Question
In: Statistics and Probability
QUESTION 19 Jean guesses that 35% of customers at a local grocery store will choose the...
QUESTION 19
- Jean guesses that 35% of customers at a local grocery store will choose the self check-out lane over the full service cashier lane. Throughout one day, she gathers data by observing 228 customers in the store. She finds that 74 of them choose the self check-out lane.
Was her guess reasonable? Assume 95% confidence. (Hint: You may use either a confidence interval or hypothesis test to help you answer this question.)
|
A. |
Yes, her guess was reasonable. |
|
|
B. |
No, her guess was not reasonable. |
QUESTION 20
- Donte predicts that a certain team will score about 102 points per game during the current season. He gathers data from 32 randomly selected games and finds a sample mean of 96.4 points with a standard deviation of 10.8 points.
Was his guess reasonable? Assume 95% confidence. (Hint: You may use either a confidence interval or hypothesis test to help you answer this question.)
|
A. |
Yes, his guess was reasonable. |
|
|
B. |
No, his guess was not reasonable. |
QUESTION 21
- A teacher predicts that 33% of RCSJ students plan to take at least one course this summer. Surveying his 128 students from RCSJ, he finds that 50 of them plan to take at least one summer course.
Was his guess reasonable? Assume 95% confidence. (Hint: You may use either a confidence interval or hypothesis test to help you answer this question.)
|
A. |
Yes, his guess was reasonable. |
|
|
B. |
No, his guess was not reasonable. |
Solutions
orchestra answered 1 year agoRelated Solutions
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