The marketing director of a large department store in Metro Manila wants to estimate the average number of customers who enter the store every five minutes. She randomly selects five-minute intervals and counts the number of arrivals at the store. She obtains the figures: 31,37,42,49,52,54,65,68. Find the mean of this sample. [S [Select] Find the standard deviation of this sample. [Select] Give the t-value for a 95% confidence coefficient, assuming a normal distribution. [Select] Give a 95% confidence interval for the number of arrivals. [Select] Suppose the computed 95% confidence interval is (39, 60), which of the below interpretation is correct. [Select]
The marketing director of a large department store in Metro Manila wants to estimate the average number of customers who enter the store every five minutes. She randomly selects five-minute intervals and counts the number of arrivals at the store. She obtains the figures: 31,37,42,49,52,54,65,68. Find the mean of this sample. [S [Select] Find the standard deviation of this sample. [Select] Give the t-value for a 95% confidence coefficient, assuming a normal distribution. [Select] Give a 95% confidence interval for the number of arrivals. [Select] Suppose the computed 95% confidence interval is (39, 60), which of the below interpretation is correct. [Select]
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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![The marketing director of a large department store in Metro Manila wants to estimate the average number of
customers who enter the store every five minutes. She randomly selects five-minute intervals and counts the
number of arrivals at the store. She obtains the figures: 31,37,42,49,52,54,65,68.
Find the mean of this sample. [Select]
Find the standard deviation of this sample. [Select ]
Give the t-value for a 95% confidence coefficient, assuming a normal distribution.
[Select]
Give a 95% confidence interval for the number of arrivals. [Select]
Suppose the computed 95% confidence interval is (39, 60), which of the below interpretation is correct.
[Select]
>](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2651dd9b-437e-4615-9355-1fbc5f9e4722%2Fbbeb9411-120a-4e69-b909-4996d0ca46fe%2F97urq7m_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The marketing director of a large department store in Metro Manila wants to estimate the average number of
customers who enter the store every five minutes. She randomly selects five-minute intervals and counts the
number of arrivals at the store. She obtains the figures: 31,37,42,49,52,54,65,68.
Find the mean of this sample. [Select]
Find the standard deviation of this sample. [Select ]
Give the t-value for a 95% confidence coefficient, assuming a normal distribution.
[Select]
Give a 95% confidence interval for the number of arrivals. [Select]
Suppose the computed 95% confidence interval is (39, 60), which of the below interpretation is correct.
[Select]
>
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