AccountingQueen

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  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,
    Feb-1999 - Mar-2006

  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,University of California
    Feb-1999 - Mar-2006

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    LSGH LLC
    Apr-2003 - Apr-2007

Category > Statistics Posted 20 Aug 2017 My Price 8.00

equation of the least-squares regression

1. Find the mean of the following data

25.7, 23.4, 20.9, 31.7, 25.1, 22.4

Question 1 options:

 

A.    20.90
 

B.    25.23
 

C.    23.59
 

D.    24.87

2. Find the median house price for the houses sold in a certain school district, if the selling prices are listed below:

112,000 

127,000

258,000

109,000

351,000

150,000

138,000

120,000

Question 2 options:

 

A.    127,000
 

B.    138,000
 

C.    132,500
 

D.    230,000

3. The given stem-and-leaf plot represents the weights of dogs at an adoption event.  Find the first quartile.

 

Question 3 options:

 

A.    Q1=20.5

 

B.    Q1=21

 

C.    Q1=7

 

D.    Q1=6.25

4. Find population standard deviation for the following data.

20.1, 22.4, 32.1, 25.7, 23.6

Question 4 options:

 

A.    4.57
 

B.    4.08
 

C.    16.67
 

D.    3.92

5. Two classes take two different versions of a biology test.  The standard deviation for the first class was 12.13 and the standard deviation for the second class was 8.14.  What conclusion can we draw from this information?

Question 5 options:

 

A.    The scores in the first class were higher.
 

B.    The scores in the first class were more spread out.
 

C.    The version of the test given to the first class was easier.
 

D.    There are more students in the first class

6. Allison took a test and her score was converted to a z-score.  Suppose the test scores were normally distributed and Allison's z-score was 0.  Which of the following is NOT a correct interpretation of Allison's score?

Question 6 options:

 

A.    Allison's score was close to the median class score.
 

B.    Allison's score was the lowest in the class.
 

C.    Allison's score was equal to the class mean.
 

D.    Approximately half the students had scores below Allison's.

 

 

7. Find the equation of the least-squares regression line given the following values: 

 

x¯=20.5,y¯=1.7,sx=4.9,sy=0.3,r=0.75x¯=20.5,y¯=1.7,sx=4.9,sy=0.3,r=0.75

Question 7 options:

 

A.    y = 1.34 + 0.046x
 

B.    y = 0.76 + 4.463x
 

C.    y = 1.34 - 0.057x
 

D.    y = 0.76 + 0.046x

8. Which pair of variables exhibit a negative association?

Question 8 options:

 

A.    Amount of gas in the tank and the number of miles traveled
 

B.    The diameter of a watermelon and its weight
 

C.    Study time and test scores
 

D.    The age of a car and the number of miles on its odometer

9. Compute the correlation coefficient for the given data.

 

Question 9 options:

 

A.    r = 0.8944

 

B.    r = -0.7835

 

C.    r = 0.6934

 

D.    r = 0.9151

10. According the the 2013 Fuel Economy Guide, a car's highway gas mileage is related to its city gas mileage by the following formula

highway mpg = 6.785 + (1.033 * city mpg)

Find the predicted highway mileage for a car that gets 28 mpg in the city

Question 10 options:

 

A.    33.1
 

B.    34.2
 

C.    28.9
 

D.    35.7

 

 

Answers

AccountingQueen
(3)
Status NEW Posted 20 Aug 2017 07:08 AM My Price 8.00

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