A university president believes that over the past few years, the mean age of students attending his university has decreased. To test this hypothesis, a study is conducted in which the age of 150 students who have been randomly sampled from the student body is measured. The mean age is 21.5 years. A complete census taken at the university a few years prior to the study showed a mean age of 23.5 years, with a standard deviation of 8.5. Test using a 1% level of significance.


What is the null hypothesis?

Answers

Answer 1

Answer:

quisiera ayudarte pero no hablo inglés:(


Related Questions

What is the distance between (2. 6) and (7, 6)​

Answers

Answer:

5

Step-by-step explanation:

Hey There!

So first off the y values are the same so to find the distance between the two points all we have to do is subtract the largest x value from the smallest x value

7-2=5

Therefore the distance between the two points is 5

Answer: 5

Step-by-step explanation:

D = √(x₂ - x₁)² + (y₂ - y₁)²

x₁ =2 y₁ =6 x₂ =7 y₂ =6

D =√(7-2)² +(6-6)²

D=√(5)² +(0)²

D =√25

D=5

PLEASE HELP!! Urgent! :((

Answers

Answer:

the angle is 245°

Step-by-step explanation:

that is a pentagon, (a shape with 5 sides)

we know 4 of the angles in the pentagon

the sum of those 4 angles is

58°+100°+112°+25°=295°

to find a shapes total amount of °, the equation is (n-2)x180°

(5-2)x180°

=540°

540°-295°=245°

x=245°

PLS HELP: SEVENTH GRADE MATH

Answers

Answer:x=15

Step-by-step explanation:3x15=45

45+45=90

x=15
45 divided by 3 equals 15

First, rewrite 1/9 and 2/15 so that they have a common denominator. Then use to order 1/9 and 2/15.​

Answers

Answer: 1/9= 5/45 or 2/15= 6/45

Step-by-step explanation:

1/9 *5/5 = 5/45

1*5 =5 (numerator)

9*5=45 (denominator)

-----------------------------------------------------------------------------------

2/15 *3/3 = 6/45

2*3= 6 (numerator)

15*3= 45 (denominator)

Simplify the expression.

7.5(–5.9)


–44.25


14.25


–11.21


44.25

Answers

Answer:

[tex] - 44.25[/tex]

Step-by-step explanation:

All i did was put it in a calculator

Answer:

hi the answer is :

-44.25

Find the area and the circumference of a circle with radius 2yd. Use the value 3.14 for pie and do not round your answer. Be sure to include the correct units in your answer

Answers

Answer:

circumference:  12.56 yd

area:  3.14(2 yd)² = 12.56 yd²

Step-by-step explanation:

The circumference formula is C = 2πr (pi, not pie), where r is the radius.

When r = 2 yd and π ≈ 3.14, the circumference is:

C = 2(3.14)(2 yd) = 12.56 yd

Evaluate: 542 × 31



A
2,168

B
2,258

C
16,802

D
17,642

Answers

Answer:

C. 16,802

Step-by-step explanation:

h h h h h h h h h h

Segment MP is a diameter of circle O.


Circle O is shown. Line segment M P is a diameter. Line segment N O is a radius. Angle N O P is 150 degrees.


Which equation can be used to find mArc M N?

mArc M N – 150 = 360

Answers

Answer:

[tex]arc\ MN + 150 = 180[/tex]

Step-by-step explanation:

Given

[tex]\angle NOP = 150^\circ[/tex]

See attachment for circle O

Required

Find [tex]arc\ MN[/tex]

The sum of angles in a semi-circle is 180 degrees.

So:

[tex]arc\ MN + \angle NOP = 180[/tex]

This gives:

[tex]arc\ MN + 150 = 180[/tex]

Hence, the equation is: [tex]arc\ MN + 150 = 180[/tex]

Answer:

A

Step-by-step explanation:

just took exam and got 100%

How are the ateas of the squares related? HELP

Answers

Answer:

c

Step-by-step explanation:

i did this b4

Can somone please help me and explain very much appreciated and this is 7th grade math btw

Answers

Answer:

4 8.95h + 10 < 115

Step-by-step explanation:

Answer: 4) 8.95h + 10 < 115

Step-by-step explanation:

We know the inequality will be equal to less than 115 since it states that the order was less than $115.

The equation would look like: some amount of shin guards times 8.95 each + $10 shipping = less than $115

8.95h + 10 < 115

(h in the given equation is the amount of shin guards)

Help me please ????????

Answers

Answer:

300

Step-by-step explanation:

YOU CAN TAKE WHATEVER THE ANSWER AND L x W x H to get that right answer

Answer:

1700 cm squared :)

Step-by-step explanation:

Which of the following statement(s) describes the rate of change of f over the interval 1.5 SXS 3? Select all that apply.

A. The rate of change is 1/2

B. The rate of change is 2

C. The rate of change is constant

D. The rate of change is increasing

Answers

The answer is going to be C

please help if you can <3

Answers

Answer:

1) x = 71

2) x = 117

5)

m<1: 35

m<2: 77

m<3: 52

m<4: 77

m<5: 65

m<6: 25

Step-by-step explanation:

1)

x + 41 + 68 = 180

x + 109 = 180

x = 71

2)

x + 47 + 16 = 180

x + 63 = 180

x = 117

3)

<2 + 103 = 180

<2 = 77

<1 + 68 + 77 = 180

<1 + 145 = 180

<1 = 35

<4 + 103 = 180

<4 = 77

<5 + 41 + 77 = 180

<5 + 115 = 180

<5 = 65

<6 + 65 = 90

<6 = 25

<3 + 103 + 25 = 180

<3 + 128 = 180

<3 = 52

THE TABLE BELOW LISTS THE NAMES OF
FOUR PEOPLE ON A TRAIN. USE THE CLUES
AT THE RIGHT TO DETERMINE EACH
PERSON'S AGE. DRAG THE CORRECT AGES TO
THE TABLE, NOT ALL CHOICES WILL BE USED.
CLUE I
The sum of Fred and Amanda's age is
109
CLUE 2
Fred's age is 1 Nore than three times
Amanda's age
NAME
AGE
Fred
Amanda
CLUE 3
Catherine is two years older than Blake
Blake
Catherine
כוח3ל
Blake's age is 16 less than two times
Catherine's age
12
27
0
61
14
16
82
87
DRAG
THESE

Answers

Fred's age is 82.

Amanda's age is 27.

Catherine's age is 14.

Blake's age is 12.

The equation that represents Fred's age is: 1 + 3x =

Where x is Amanda's age

Fred and Amanda's age : 109 = 1 + 3x + x

4x + 1 = 109

4x = 109 - 1

4x = 108

x = 108 / 4

x = 27

Fred's age = 1 + (3 x 27) = 82

The equation that represents Blake's age is: b =  2c - 16

Where: b = Blake's age

c = Catherine's age = 2 + b

b = 2(2 + b) - 16

b = 4 + 2b - 16

16 - 4 = 2b - b

12 = b

Catherine's age = 12 + 2 = 14

To learn more about addition, please check: https://brainly.com/question/349488

#SPJ1

how do you work out standard form in maths

Answers

Answer:

ok

Step-by-step explanation:

is that you write down 1 and 10 then you write x10 to the power of a number

can anybody tell me what to do

Answers

Answer:

8n=8×5=40

..............

The total length of a road trip was 19.6 hours. If highway signs are posted every 0.7 hours, including one at the end of the road trip, how many highway signs will there be on the road trip.

Answers

Answer:

28

we can do it by dividing the journey time by in how after how many time the sign is place so 19.6/0.7=28

Hope you like it please make me the brainiest.

Thank You

-Parshv

help me solve for x

Answers

Answer:

50.6

Step-by-step explanation:

Write an equation to find the total number of hours h the instructor exercises in any number of weeks w

Answers

have a pic of the problem?

Marie donated 36% of her comic books to a
school. If she donated 135 comic books, how
many did she own before her donation?

Answers

Answer: 375

Step-by-step explanation:

Let x equal the number of comic books before her donation.

x × 0.36 = 135

135/0.36 = 375

-6e+2=-10 What does E=

Answers

-6e+2=-10
-10 -2=-12
-6e=-12
-12/-6
E=2

For your vacation, you pack 3 shirts,
2 pairs of pants, and 2 pairs of
shoes. How many combinations of
unique outfits can you make?

Answers

Answer:

12

Step-by-step explanation:

3 shirts x 2 pants x 2 pair shoes= 12 outfits

There are 8 shirts in your closet, 4 blue shirts and 4 green shirts. You randomly select one to wear on Monday and then a DIFFERENT one on Tuesday. What is the probability you will wear blue on both days?

Question 8 options:

A. 5/14

B. 1/4

C. 1/2

D. 3/14

Answers

Answer:

1/4

Step-by-step explanation:

1/4 ‏‏‎ ‎ ‏‏‎ ‎ ‏‏‎ ‎ ‏‏‎ ‎​

у
What is the relation between the variables in the equation x?
10 ?
a. x varies directly with the square of y
b. y squared varies inversely with x
c. y varies directly with x squared
d. y varies inversely with x squared

Answers

Answer:

We need an equation to complete this question. please post another question, including an equation

A cylinder has a volume of 36 cubic inches. What is the volume of a cone if it has the same radius and height as the cylinder?

Answers

Answer:

12 cubic inches

Step-by-step explanation:

volume of a cylinder= pi*r2*height

but we are given 36 as cylinder volume.

Therefore , 36 = pi*r2* height

r2*height = 36/pi, let call this equation 1

volume of a cone = pi*r2*height/3;

but from equation 1, r2*height =36/pi, substituting this value in volume of cone.

volume of cone= pi*(36/pi)/3 = 12 cubic inches

Use the interactive to describe the conic given by the equation 3x2 – 9xy + 8y2 + x + y – 27 = 0.

Ellipse with foci in the first and third quadrants.
Ellipse with foci in the second and fourth quadrants.
Hyperbola with foci in the first and third quadrants.
Hyperbola with foci in the second and fourth quadrants.

Answers

Answer:

A) Ellipse with foci in the first and third quadrants.

Step-by-step explanation:

please help me plzzz​

Answers

Answer:

400, im positive

Step-by-step explanation:

im sure !!

400 I think no I’m sure

The product of a binomial and a trinomial is x3+3x2-x+2x2+6x-2 Which expression is equivalent to this
product after it has been fully simplified?

Answers

The answer is the first one.
Explanation:
X^3 stays the same because there are no other cubed numbers in the problem
Next you combine the x^2s
The x^2s are +3x^2 and +2x^2
Since they are both positive, you add them: 3x^2 + 2x^2 = 5x^2
Next you do the x values
-x and +6x, also known as 6x - x = 5x
Lastly, you just add in the -2 and get:
X^3 + 5x^2 + 5x - 2

1. Circle or highlight the letter that correctly identifies the following exponential equation into its equivalent logarithmic form.
am = p


A. logp(a) = m B. loga(p) = m C. loga(m) = p D. Not Shown

Answers

9514 1404 393

Answer:

  B. loga(p) = m

Step-by-step explanation:

Equivalent forms are ...

  [tex]a^m=p\quad\longleftrightarrow\quad\log_a(p)=m[/tex]

_____

Additional comment

It helps me to remember that a logarithm is an exponent. The base of the exponent is the base of the logarithm.

Pls help I’ll give brainliest

Answers

Answer:

B)  7 gallons

Step-by-step explanation:

car begins with 12 gallons and, at a rate of 29 mpg, would allow the car to travel for 348 miles

car only traveled 140 miles so 208 miles more can be driven

208÷29 is approx 7 gallons

Other Questions
What does stanza 7 reveal? Help plis.............. What would happen if earth had no atmosphere Describe white blood cells you see at 10X? Write the number of the clock next to the matching sentence The area of Mrs. Rushs rectangular room is 3x2+31x+36. Find the length, width and perimeter. please help will mark brainliest! (random answers will be reported) Which facts or evidence from "Changing Views of Earth" support the claim that humans learn more when they look higher? Select the two correct answers. A. The graph shows that there are new spheres higher in the atmosphere. B. There are many layers to the atmosphere, and every layer is different than the one before it. C. If someone wants to learn more, he or she should heighten his or her senses. D. Many human-made objects go up into the sky such as kites and balloons.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelllllllllllllllllllllllllllllllpppppppppppppppppppppppppppppppp plz\\ The price of a new car is $42,500. If the sales tax rate is 6.5%, then how much sales tax is being charged determine the type of symmetry Write a program that takes a list of integers as input. The input begins with an integer indicating the number of integers that follow. You can safely assume that the number of integers entered is always less than or equal to 10. The program then determines whether these integers are sorted in the ascending order (i.e., from the smallest to the largest). If these integers are sorted in the ascending order, the program will output Sorted; otherwise, it will output Unsorted Find the absolute value of... |7|-7 or 7? how could I summerize the nervous system? Which statement is not true about the absolute value of -6 I need helppppppppppppppppppppppppppppppppppppppp Angel got 4 problems wrong on a test of 50 questions. What percent of the questions did he get CORRECT Display the IP address of the default gateway of this device. The chart below shows the division of services provided by local and state governments.Why are these different services provided by different levels of government?a. Local government services require more training.b. Local government services are less efficient.c. Local government services affect people in a smaller area.d. Local government services are more expensive. Pleaseeeee answer I will mark brainliest for best answer ^>^ The man with whom she had lunch yesterday is her boss