Consider the follow data on moviegoer spending on snacks
tutor4helpyouQ5. 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?
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