Answer:
1. Variance of beta decreases as SST increases.
2. option a
Step-by-step explanation:
SST is same as total sum of squares. From the formula above, if the value of SST increases, the variance of beta decreases.
In this model, if the sample size n is increased, the the sampling variance beta is going to reduce. The variance of the distribution is population variance / the size of the sample n. so the bigger n becomes, the lower the sampling variance of beta.
PLSS HELPPPP!!!
Which expressions represent the total area of the large rectangle? Select all that apply.
Answer:
A, C, and E
Step-by-step explanation:
Suppose you're hiring a new worker for your business. You'd like someone reliable. Suppose you use administer a test to job-seekers many other employers use to determine if applicants have this trait. The test is 90% senstitive and 95% specific. If 60 unreliable people apply and 20 reliable people apply, how many positive results will you have
Answer:
You will have 21 positive results.
Step-by-step explanation:
Sensitivity of test:
Is the true positive rate, that is, the proportion of positive results that give positive tests.
Specificity of test:
True negative rate, that is, the proportion of negative results that give negative tests.
90% sensitive, 20 reliable people apply
0.9*20 = 18
95% specific, 60 unreliable people apply
1 - 0.95 = 0.05 of positive results.
0.05*60 = 3
How many positive results will you have?
18 + 3 = 21
You will have 21 positive results.
A school principal of 890 students needs to determine what percentage of students passed and did not pass a statewide examination. 300 students passed. Round to the nearest percent.
What percent did not pass the test?
Answer:
Percentage = 66%
Step-by-step explanation:
Let the number of students that pass be P.
Let the number of students that fail be F.
Given the following data;
Total number of students, T = 890 students
P = 300 students
To find the percentage that failed;
First of all, we would determine the number of students that failed using the mathematical expression given below;
Total students, T = P + F
890 = 300 + F
F = 890 - 300
F = 590
[tex] Percentage = \frac {590}{890} * 100 [/tex]
[tex] Percentage = 0.6629 * 100 [/tex]
Percentage = 66.29 ≈ 66%
Therefore, the percentage of students that failed or didn't pass is 66%.
Someone help me ASAP
Answer:
1972
Step-by-step explanation:
area of retangle plus area of triangle minus area of half circle
Given this matrix equation:
3 X 6 1 [-3 x-17
-Y X Y =
6 -2y
[Ty 2 8 4 6
-2
12
Choose the equation that you can use to solve
for x:
3-6 = -3
X-1 = x - 1
x²_x=6
--Y-y=-2y
Answer:
The correct answer is x²-x=6
Step-by-step explanation:
Answer:
c and -2 and 3
Step-by-step explanation:
Which of these fractions is another name for 1/2?
A.
4/8
B.
1/3
C.
4/6
D. 3/4
20. Find the mean, median, and mode for the following
data set:
83 98 22 89 99 98
Answer:
a. Mean = 81.5
b. Median = 93.5
c. Mode = 98
Step-by-step explanation:
Given the following data;
x = 83, 98, 22, 89, 99, 98
F(x) = 83 + 98 + 22 + 89 + 99 + 98
F(x) = 489
Number of items, n = 6
a. To find the mean;
Mean = F(x)/n
Mean = 489/6
Mean = 81.5
b. To find the median;
Median refers to the middle number of a sorted data. Thus, we would arrange the number in an ascending order and choose the middle number.
x = 22, 83, 89, 98, 98, 99
Middle numbers = 89 and 98
Median = (89 + 98)/2
Median = 187/2
Median = 93.5
c. To find the mode;
Mode is the number which appeared the most in the series.
Mode = 98
The Mean, median, and mode for the following data set are as follows:
Mean is 81.5Median is 93.5Mode is 98.What are the measures of central tendency?The measures of central tendency include the mode, the median, and the mean.
Statistically, a central tendency is a typical value for a probability distribution.
The mode's value appears most often in a set of data values. The median is the middle value of a dataset. The mean represents the average.
Data and Calculations:Data set (in ascending order)
22 + 83 + 89 + 98 + 98 + 99 = 489
Mean = 81.5 (489/6)
Median = 93.5 (89 + 98)
Mode = 98 (occurred twice more than other values)
Learn more about the mean, median, and mode at https://brainly.com/question/14532771
#SPJ1
f - 4.1 = 8.6
please help i need ur help please
Answer:
f=12.7
Step-by-step explanation:
Answer:
12.7
Step-by-step explanation:
To find f, we need to "reverse" the operation and do 8.6 + 4.1 which equals 12.7.
Double check: 12.7 - 4.1 = 8.6 which is true. Therefore, 12.7 = f.
Hope this helps! If it did, please give me brainliest! It would help me a lot! Thanks! :D
Which sets of measurements could be the side lengths of a triangle?
Select each correct answer.
A. 6 cm, 7 cm, 8 cm
B. 4 cm, 8 cm, 13 cm
C. 3 cm, 3 cm, 3 cm
D. a 7 cm, 7 cm, 10 cm
E. 5 cm, 9 cm, 14 cm
Answer:
A
Step-by-step explanation:
easy way to take a note
is that the sum of the 2 first angles much be greater than the 3rd one
so A
A rectangular prism gift box has dimensions of 2.5 inches and 7 inches in 9 inches how much wrapping paper will it take to cover the gift Boxxx round the answer to the nearest 10th
Find the formula for
B
Answer:
m²
Step-by-step explanation:
Just square m
Answer:
It is m^2
Step-by-step explanation:
How many subsets does this set have: A = {2,4,6,8,10}
A. 5
B. 8
C. 28
D. 32
Answer:
5(option a) is the correct answer
The temperature in Lancaster was 19°C. The temperature in Yardley was –21°C. How much warmer was the temperature in Lancaster than the temperature in Yardley?
Answer:
It was 40 degrees warmer in Lancaster than Yardley.
Step-by-step explanation:
Answer:
19-(-21)=40°
Step-by-step explanation:
Warmer temperature has to carry a positive sign
What is the number of b? 50b = 7,300
Answer: 146
Step-by-step explanation: Divide 7300 by 50
Answer:
b = 1460
Step-by-step explanation:
50b = 7,300
the steps are easy and simple- Divide 50 on each side
50b/50 = 7300/50
this will isolate b and give it's answer
b = 1460
Graph x > -5 on a number line.
Answer:
yes
Step-by-step explanation:
that is correct unless your asking something else?
Quadrilateral A'B'C'D'is the image of quadrilateral ABCD under a rotation of about point Q.
Determine the angle of rotation
a. -90
b. -60
c. 60
d. 90
9514 1404 393
Answer:
a. -90°
Step-by-step explanation:
Point A is straight west of Q.
Point A' is straight north of Q. This represents a rotation of 90° clockwise, or -90°. (Positive angles are counterclockwise.)
HELP PLEASE! ILL MARK BRAINLIEST!
A rental car company charges $53.75 per day to rent a car and $0.07 for every mile driven. Alexander wants to rent a car, knowing that: He plans to drive 425 miles. He has at most $320 to spend. Write and solve an inequality which can be used to determine dthe number of days Alexander can afford to rent while staying within his budget .
Answer:
5 days
Step-by-step explanation:
425x0.07=29.75
320-29.75=290.25
290.25÷53.75=5.4
Answer:
Inequality: 53.75d + 29.75 ≤ 320
Answer: d ≤ 5.4
Step-by-step explanation:
help plz me plz plz plz
Answer:
D
Step-by-step explanation:
Brainly plss it would make my day :))))
Answer:
#2
Step-by-step explanation:
Reconsider Dr. Sameer's research question about how much time Cal Poly students spend on watching television. Suppose that for the random sample of 100 Cal Poly students the mean number of hours per day spent watching TV turns out to be 3.01 hours, and the standard deviation of the number of hours per day spent watching TV turns out to be 1.97 hours.
a. Is the number 1.97 a parameter or a statistic? Assign an appropriate symbol to this number.
b. Find the standardized statistic to investigate whether the data provide evidence that the average number of hours per day Cal Poly students spend watching TV is different from 2.75 hours.
c. What is your conclusion about the hypotheses, based on the calculated value of the standardized statistic? How are you deciding?
Answer:
a. 1.97 is a statistic
b. t test is = 1.32
p value = 0.186
c. there is not enough evidence to support our claim
Step-by-step explanation:
a. 1.97 is not a parameter it is a statistic. It is the standard deviation of the sample. we represent this with the symbol s.
b. we are claiming that the mean hours that are spent watching television is different from 2.75
we form our hypothesis as:
h0; u = 2.75
h1: u not equal to 2.7
t stat = barx - u/s/√n
= 3.01-2.75/(1.97/√100)
= 0.26/(1.97/10)
= 0.26/0.197
= 1.32
we get p value
n = 100
df = 100-1 = 99
using t distribution, pvalue = 0.1899
c. the p value is higher than our alpha level here
0.189 > 0.05, so we fail to reject H0. our conclusion is that there is not enough evidence to show that μ is different from 2.75
Which three lengths can NOT be the lengths of the sides of a triangle?
A.23 m, 17 m, 14 m
B. 5m, 7m, 8m
C. 21m, 6m, 10m
D.11 m, 11 m, 12 m
Answer:
C. 21m, 6cm, 10m
Step-by-step explanation:
Please help i have a zero on this i need to get 100
Answer:
The answer is D :)
Step-by-step explanation:
write a fraction with a denominator of 9. The fraction should be less than half
Answer:
The only fraction i can think of is 2/9
Step-by-step explanation:
if 9% of the air leaks out of brian bicycle tire everyday, what percent of the air will be left after 3 days. after a week. round your percent to 2 decimal places
Answer:
3 days = 75.36%1 week = 51.68%Step-by-step explanation:
You can use the future value formula to calculate this:
Future value = Amount * (1 + rate)^ no. of periods
As there is no given amount, simply calculate using (1 + rate)^ no. of periods.
After 3 days:
= (1 + (-9%))³
= 0.753571
= 75.36%
After a week:
Week = 7 days
= ( 1 + (-9%))⁷
= 0.51676
= 51.68%
In a room at a museum, we want to tile the floor. If the floor measures 15 feet by 55 feet, what is the largest-size square tile that we can use to tile the floor without having to cut tiles?
A) 11 ft by 11 ft
B) 5 ft by 11 ft
C) 5 ft by 3 ft
D) 3 ft by 3 ft
E) 11 ft by 3 ft
F) 5 ft by 5 ft
Answer:
B. 5 foot by 11 foot
the numbers have to be divisible in both directions.
11x11 doesn't work, because at 15 feet wide one tile isn't wide enough, and 2 is too wide.
5x11 works- 3x5= 15 and 11x5=55. you'd use 15 tiles.
the rest are all smaller.
FIRST TO ANSWER RECIEVES BRAINLIEST
In the figure below, the radius of circle O is 3 centimeters.
What is the length of the arc bounded by central angle POQ?
cm
7 cm
оооо
EIN 50
За cm
3л
cm
2
Answer:
C)
Step-by-step explanation:
As it is 60 degree, and the whole circle is 360 degree, so we need to find 1/6 of the circumference of a circle, as C = 2*pi*r = 2*pi*3 = 6pi and 1/6 of it is pi.
3 x 2 1/2= ?????????????????/
Welp
Answer:15/2
Step-by-step explanation:
0.08 times what equals $1.20
Answer:
15
Step-by-step explanation:
1.20 divided by 0.08 is 15
0.08 x 15= 1.20
Amihan bought ½ kilogram of beef. Write ½ kilogram I'm decimal form
1/2 in decimal form is 0.5
When I think of a number, double it, then add
seven, I get 23. Determine the number that I
first thought of.
Answer:
8
Step-by-step explanation:
23 - 7
= 16
16 ÷ 2
= 8
u thought of 8 ;)
Answer:
number maybe 8...
Step-by-step explanation:
because if you will double 8 then you will get 16 and if you will add 16 with 7 you will get 23....
Dr. Toliver has 6 fossils.
Dr. Cook has 5 times as many fossils as Dr. Maranan.
They have 90 fossils altogether. How many fossils does Dr. Maranan have?
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(hp
Answer:
dude 30 fossils are left
Step-by-step explanation: