A professor wants to determine the best way to present an important topic to his class. He has the following three choices: he can lecture, he can lecture plus assign supplementary reading, or he can show a film and assign supplementary reading. He decides to do an experiment to evaluate the three options. He solicits 15 volunteers from his class and randomly assigns 5 students to each of the three conditions. The students were subsequently tested on the material. The following scores (percentage correct on the test) were obtained:
LECTURE Lecture + Reading Film + Reading
92 86 81
86 93 80
87 97 72
76 81 82
80 94 83

Answers

Answer 1

Answer:

lecture plus assign supplementary reading

Step-by-step explanation:

So I think how you do it is to find the mean of each. The middle one has the highest mean. Also, it has 3 As and 2 Bs, the first one only has one A and the last one does not have an A.


Related Questions

me pueden ayudar profabor ​

Answers

Answer:

que que

Step-by-step explanation:

que

Find the midpoint of the line segment with end coordinates of:
(-3, -1) and (4, -5)
Give coordinates as decimals where appropriate.​

Answers

Answer: (0.5, -3)

Explanation:

The midpoint formula is (x1+x2) divided by 2, (y1+y2) divided by 2.

It should look like this: (-3+4/2, -1+-5/2)

Help me out please I’ll give all five stars

Answers

I think it is 10 miles.

I hope this helps! :)

To start planning the rooms' floor plans, you draw them each to scale on large sheets of paper. You are going to use the scale 1 foot: 2 inches. That is, 1 foot in real life will be represented by 2 inches on your paper. How many square inches of paper do you need for the bedroom? Enter just the number in the blank below.

Answers

Answer:

(/480/) is the answer I just took the test

Step-by-step explanation:

The number of square inches of papar we need for the bedroom is 480.

How are scale drawings formed?

For a particular scale drawing, it is already specified that all the measurements' some constant scaled version will be taken. For example, let the scale be K feet to s inches.

Then it means

[tex]\rm 1\: ft : \dfrac{s}{k}\: in.[/tex]

All feet measurements will then be multiplied by s/k to get the drawing's corresponding lengths.

For this case, the scale drawing is converting

1 foot (of real world) : 2 inches (on drawing paper).

Thus, 1 sq. ft area = 2^2 = 4 sq. inch area on paper. (we squared 2, since the square whose sides are 1 ft in real world, will haves sides of 2 inches in drawing, so a side of 2 inches sq. has 4 sq. inch area.)

The area of the floor is 120 sq. ft (some parts are missing in the question statement).

So, as 1 sq. ft : 4 sq. inches on paper,

thus, 120 sq. ft : 120 × 4 = 480 sq. inches area on paper.

Thus, to draw the whole bedroom (which is based on the floor), we need at least 480 sq. inches of paper.

Learn more about scale factors here :

https://brainly.com/question/8765466

a car travels 156 miles in 3 hours and 15 minutes. how many miles does it travel per hour

Answers

Answer:

48 mph

Step-by-step explanation:

Convert 3 hours 15 minutes to hours.

15 minutes = 15/60 hour = 1/4

So 3 hours 15 mins = 3 1/4 hours = 13/4 hours

156 miles in 13/4 hours ==> speed = 156 ÷ 13/4 = 156 x 4/13 = 48

If a 5-foot tall man casts a shadow of 12 feet when standing on level ground, then the distance from the top of his head to the tip of his shadow is​

Answers

Answer:

13 feet

Step-by-step explanation:

you can use the Pythagorean Theorem to solve this problem because the man standing on the ground forms a 90 degree angle

5² + 12² = c²

25 + 144 = c²

169 = c²

c = √169 which is 13

Can someone please help me like fast??

Answers

answer:125.03
Explanation: The rounded side of the numeral expands to the width of the line causing-

Find the value of x that makes the equation true

Answers

Answer:

9

Step-by-step explanation:

12/9=1.33 repeating and 8/6=1.33 repeating

Hopes this helps:

Answer: x = 9

Have a great day.

! + 3 − 5 = 0; by completing the square

Answers

Answer:

x = 1.19258 and x = −4.19258

Step-by-step explanation:

The given equation is :

[tex]x^2+3x-5=0[/tex]

Keep x terms on the left and move  the constant to the right side  by adding it on both sides.

[tex]x^2+3x=5[/tex]

Take half of the x term and square it.

[tex](3\times \dfrac{1}{2})^2=\dfrac{9}{4}[/tex]

then add the result to both sides

[tex]x^2+3x+\dfrac{9}{4}=5+\dfrac{9}{4}\\\\(x+\dfrac{3}{2})^2=\dfrac{29}{4}\\\\(x+\dfrac{3}{2})=\sqrt{\dfrac{29}{4}}\\\\x=\dfrac{-3}{2}+\sqrt{\dfrac{29}{4}}\\\\x=\dfrac{-3}{2}-\sqrt{\dfrac{29}{4}}[/tex]

So,

x = 1.19258 and x = −4.19258

Hence, this is the required solution.

Raj has a 25m by 15m rectangular lawn. He mows a strip of uniform width and leaves
a patch of lawn that is 60% of the original area.
What is the width of the strip? (to one decimal place)

FULL WORK PLEASE

Answers

Here is the answer and explaining how i did it

Six less than the product of a number n and 1/5 is no more than 99

Answers

Answer:

(n * ⅕) - 6 ≤ 99

Step-by-step explanation:

Translating the word problem into an algebraic expression, we have;

(n * ⅕) - 6 ≤ 99

Opening the bracket, we have;

n/5 - 6 ≤ 99

Rearranging the equation, we have;

n/5 ≤ 99 + 6

n/5 ≤ 105

Multiplying both sides by 5, we have;

5 * n/5 ≤ 105 * 5

n ≤ 525

I need some help!! I will try to give brainliest!!!

Answers

Answer:

x = 35

y = 95

Step-by-step explanation:

(For y) The measure of a line is 180 degress. 180 - 95 - 50 = 35.

(For x) The measure of a triangle is 180 degress. 180 - 50 - 35 = 95.

Answer:

x = 85, y = 45

Step-by-step explanation:

solving for x:

180 - 95 = 85

solving for y:

85 + 50 = 135

180 - 135 = 45

Good luck on your schoolwork

Which value for x makes the sentence true?

Answers

Answer:

[tex] {\huge{\boxed{\underbrace{\pink{here \: is \: your \: solutio}}}}} \\ \\ {\huge{\boxed{\mathcal{\green{0.58x = 2.3316}}}}} \\ \\ {\huge{\boxed{\mathcal{\green{x = 2.3316 \div 0.58 }}}}} \\ \\ {\huge{\boxed{\mathcal{\green{x = 4.02}}}}} \\ \\ \huge\mathfrak\blue{ Hope \: it \: helps...}[/tex]

Part A: explain why x coordinates of the points where the graphs of the equations y=4^x and y=2^(x-1) intersect are the solutions of the equation 4^x=2^(x-1). Part B: Make tables to find the solution to 4^x=2^(x-1). Take the integer values of x between -4 and 4. Part C: How can you solve the equation 4^x=2^(x-1) graphically?

Answers

9514 1404 393

Explanation:

A. The given equation will have a solution when the value of x makes the left-side expression equal to the right-side expression.

The value of the left-side expression for a given value of x is the y-value of y=4^x. The value of the right-side expression for a given value of x is the y-value of y=2^(x-1). The left-side expression will be equal to the right-side expression for a given value of x when the graph of y=4^x and the graph of y=2^(x-1) have the same y-value. That is, the graphs will be of the same point for that x-value. That is what we mean when we say the curves will intersect at that point.

The x-coordinate of the point of intersection is the value that makes the expressions equal, hence it is the solution to the equation.

__

B. The tables are included in the first attachment. We have used f(x) to represent the left-side expression, and g(x) to represent the right-side expression.

__

C. As described in Part A, the graphs will cross at the solution point. Hence the equation can be solved graphically by graphing the left-side expression and the right-side expression and seeing where the graphs cross. (That is at the point (-1, 0.25) on the attached graph.)

Alternate graphical method

The solution can also be found graphically by graphing the difference of the expressions: y = 4^x -2^(x-1). This difference will be zero at the value of x that makes the two expressions equal. That is, the x-intercept of the graph of this difference will be the solution value. The second attachment shows this sort of graphical solution. (It works nicely because many graphing calculators will display the value of the x-intercept.)

Find the value of x. DO NOT POST ANY FILES.

Answers

Answer:

9

Step-by-step explanation:

12^2+x^2=(x+6)^2

144+x^2=x^2+12x+36

12x=108

x=9

The sum of 8 and Jose's savings is 50.

Answers

Answer:

8 + x = 50, so Jose's saving or x = 42

Hope this helps!

Answer:

The equation is: s + 8 = 50

The amount of Jose's savings is: 42

Step-by-step explanation:

Let s = Jose's savings.

s + 8 = 50

Subtract 8 from both sides.

s = 42

The equation is: s + 8 = 50

The amount of Jose's savings is: 42

Proper angle for a ladder is about 75° from the ground. Suppose you have a 10 foot ladder. How far from the house should you place the base of the latter? Round to the nearest hundredth

Answers

Answer:

The base of the ladder is 2.58 m.

Step-by-step explanation:

Given that,

The angle of elevation for a ladder from the ground is 75°.

The length of a ladder, H = 10 foot

We need to find the distance from the house should you place the base of the latter. Let the base of the ladder is b. Using trigonometry,

[tex]\cos\theta=\dfrac{B}{H}\\\\B=H\times \cos\theta\\\\B=10\times \cos(75)\\\\B=2.58\ m[/tex]

So, the base of the ladder is 2.58 m.

Which expressions are equivalent to - f - 502f - 3)?

Answers

Answer:

?

Step-by-step explanation:

What grade is this for?

the expression x + 16 divided by 2 is an example of an _____ please help :(

Answers

Answer:

rational number.................

hey akaspratt since I didn’t give you brainliest would you like To answer This question what’s The absolute value of -14

Answers

Answer:

14

Step-by-step explanation:

Absoloute value means the distance from 0, so the distance of -14 from 0 is 14

Answer:

absolute value:14

1. For a one-tailed test (lower tail) at 93.7% confidence, Z =

2. For a one-tailed test (upper tail), a sample size of 24 at 90% confidence, t =

3. In a one-tailed hypothesis test (lower tail=left tailed test) and where the population standard deviation is known, the test statistic is determined to be -2.5. What is the p-value for this test?

Answers

Answer:

1) Z = -1.8592

2) t = 1.7139

3) p = 0.0062

Step-by-step explanation:

1) Area: (93.7+100)/2 = 193.7/2 = 96.85

Z = invNorm(0.9685,0,1) = 1.8592, but since the test is one-tailed at the lower tail, Z is actually -1.8592

2) Area: (90+100)/2 = 190/2= 95 where df=n-1=24-1=23

t = invT(0.95,23) = 1.7139

3) Since the population standard deviation is known, our test statistic is z=-2.5, making the p-value for the test p=normalcdf(-1e99,-2.5,0,1) = 0.0062

HELP WILL GIFT 30 EXTRA POINTS IF SOLVE ANSWER ALL QUESTIONS PLEASE!!!

Answers

Answer:

Question 1: The amount of students that Yolanda kept track of doesn't add up to her sample space.

Question 2: The sample space is 237. I know this because it said in the question she was asking all of the students at their Middle School which happened to be 237. A sample space is the group that you are taking information from. They are taking information from 237 students.

What is the length of the radius of a circle whose circumference is 125.6 feet? Use 3.14 for Pi.

Answers

Answer:

Hello! answer: 20

Step-by-step explanation:

circumference is just diameter × pi so If we do circumference ÷ pi we will get our diameter so

125.6 ÷ 3.14 = 40 But remember diameter is just twice the radius so all we have to do is divide by 2 to get our radius so

40 ÷ 2 = 20 So 20 is the radius Hope this helps!

Answer:

the answer is 20 feet

Step-by-step explanation:

divide the circumference by 3.14 gives you the diameter then divide the diameter by 2 to get the radius.

Ben deposited $6,500 in a simple interest account that pays 2.8% interest annually. If Ben leaves the money in the account for 12 years, how much interest will he earn?

Answers

Answer: $2184

Step-by-step explanation:

(6800)(0.028)(12) = 2184

Can anyone give me some advices for my sis cause she is going to high school soon and I'm worried- even tho she is older then me, she is Autism and ofc I'm worried-​

Answers

Don't worry I'm sure there'll be great people that would love to be friends with her!, you can also try to call everyday after she finishes her classes^^

Step-by-step explanation:

Advice;

Talk to her, let her know of the things she could be facing, yes we can give her as much advice as needed but it won't stop her from facing other rude teenagers.If she has a temper you guys should come up w coping mechanisms to use during school when she'll be alone. It's good practice to growing up.Ask for a tour around the school, it'll help her be more aware of her surroundings when she starts to attend.If she's nervous about entering a whole different nd new place it's fine, assure her it's going to be okay it'll just be a little adjustment.

Advice for you; ( I know it wasn't asked of )

Calm down. Don't stress, I mean I know you're gonna, she's your sister but worrying about her is just gonna be a whole other problem you don't need. She's fine, she'll be fine, you don't want her to see you worry nd make her feel the same way, right?

Alright, hope this was helpful! Need a little more insight? Feel free to ask.

A restaurant owner wanted to know how often the customers in her restaurant eat out. Which sample will give her the most reliable results?


A. first 50 customers that come into the restaurant on Monday


B. every 10th customer that comes into the restaurant on a weekend


C. 50 male customers arriving at different times 2 days in a row


D. 100 customers arriving at different times, on different days during the week

Answers

Answer:

d should be correct, I hope this helps!

Step-by-step explanation:

:D

Answer:

c

Step-by-step explanation:

Solve
5.27*0.01(2.1)

Answers

Answer:

the answer is 0.11067

Step-by-step explanation:

The plane region is revolved completely about the x-axis. Find its surface area in EXACT form (in terms of pi and/or with simplified radicals as necessary). ​

Answers

Answer: The Given plane region is missing attached below is the plane region

answer : 24 π  or 75.40 sq. units

Step-by-step explanation:

Given data :

Height of plane region = 3

base of plane region  = 4

When we revolved the plane region completely we will we forming a cone hence we will calculate for the surface area of a cone

Radius of the new cone = 3

Height of the cone = 4

slant height of the cone ( l )  = [tex]\sqrt{4^2 +3^2}[/tex]  = 5

surface area of cone = πr^2 + πrl

                                   = π ( 3 )^2  + π (3 ) ( 5 )

                                   = 24 π  or 75.40 sq. units

All seniors voted for this year's prom theme. The bar graph below shows the distribution of responses of which theme each student selected. Is there a problem with the way the data are displayed in the bar graph?

Answers

Answer:

yes there is a problem

Step-by-step explanation:

The ranking should start from 0 n u can see its started from5

Answer:

(A) Yes, the vertical axis should begin at 0, not at 5.

Step-by-step explanation:

I just took the AP Stat Unit test on Edg2022 and got 100%.

When the vertical axis does not start at 0, it makes the graph look misleading.

Don't forget to press that THANKS button!

i don’t need any work for it i just need the answer

Answers

The Answer would be 864mm^2
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