The chart shows the waiting times for customers while having winteinstalled on their cars.Time (min) Frequency30-351035-401640-452145-501750-551955-60860-65Q6. a) (A) Use the midpoints of the intervals as the measurements,estimate the mean of the wait times.2. Q6. b) (A) What is the standard deviation of wait time?Your answerQ6. c) (A) One autoshop has a policy that if a customer is waiting for morethan a z-score of 1.37, they will receive a free Starbucks gift card. What isthe minimum wait time to receive this gift card?

We have to find the mean and standard deviation for data given with the frequency.

The chart shows the waiting times for customers while having winte installed on their cars. Time (min) Frequency 30-35 10 35-40 16 40-45 21 45-50 17 50-55 19 55-60 8 60-65 Q6. a) (A) Use the midpoints of the intervals as the measurements, estimate the mean of the wait times. 2.

The chart shows the waiting times for customers while having winte installed on their cars. Time (min) Frequency 30-35 10 35-40 16 40-45 21 45-50 17 50-55 19 55-60 8 60-65 Q6. a) (A) Use the midpoints of the intervals as the measurements, estimate the mean of the wait times. 2.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

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The chart shows the waiting times for customers while having winte
installed on their cars.
Time (min) Frequency
30-35
10
35-40
16
40-45
21
45-50
17
50-55
19
55-60
8
60-65
Q6. a) (A) Use the midpoints of the intervals as the measurements,
estimate the mean of the wait times.
2.

Q6. b) (A) What is the standard deviation of wait time?
Your answer
Q6. c) (A) One autoshop has a policy that if a customer is waiting for more
than a z-score of 1.37, they will receive a free Starbucks gift card. What is
the minimum wait time to receive this gift card?

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