Consider the follow data on moviegoer spending on snacks

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Q5. Consider the follow data on moviegoer spending on snacks:

 

Dollars Spent

(Y)

Age

(X)

8.50

30

10.00

50

3.00

24

5.25

12

20.75

33

 

 

Calculate b0, the intercept of an OLS regression line, using dollars spent as the dependent variable (Y) and age as the independent variable (X). Round your answer to 4 decimal places.

 

Q6.Consider the following regression equation:

 

WAGE = -37.25 + 3.85*EDUCATION

 

where WAGE is the hourly wage in dollars, and EDUCATION is the number of years of education. What wage do you predict for a person with 16 years of education? 

 

Enter your answer as a number without the dollar sign; for example, if you thought the answer was $1, then your answer would be entered as 1 in the box below

 

Q7.The typical number of red lights drivers must stop at during their morning commute in Greensboro, NC has the probability distribution shown below.

X

0

1

2

3

4

5

Total

P(X)

0.15

0.15

0.20

0.25

0.20

0.05

1.0

 

Calculate the expected value of X.


 

Q8.Consider the follow data on moviegoer spending on snacks:

 

Dollars Spent

(Y)

Age

(X)

8.50

30

10.00

50

3.00

24

5.25

12

20.75

33

 

 

Calculate b1, the slope of an OLS regression line, using dollars spent as the dependent variable (Y) and age as the independent variable (X). Round your answer to 4 decimal places.

 

Q9.The time it takes to give a customer a shampoo and a haircut at a barber shop is normally distributed with mean 22 minutes and standard deviation 3 minutes. Customers are scheduled every 30 minutes. What is the probability that a customer will take longer than the allotted time (i.e. the probability the visit takes longer than 30 minutes)?  Round your answer to 4 decimal places.

 

Q10.Let's assume we know that the time it takes to prepare for bed is normally distributed with a mean of 38 minutes and with a known standard deviation of 6 minutes. Next, suppose you have a sample of 100 people.   Find the 90 percent confidence interval for μ assuming the sample is from a normal distribution.

 

Q11.At Old Town, the probability that a UNCG student orders an alcoholic beverage after taking a final exam is .90.  With a sample of 5 UNCG students at Old Town, what is the expected number (i.e. average number) who will order an alcoholic beverage?

 

 

 

 

    • 9 years ago
    Consider the follow data on moviegoer spending on snacks
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