Past experience indicates that the variance in the time it takes for a "fast lube" operation to actually complete the lube and oil change for customers is 9.00 minutes. The manager wishes to estimate the mean time with 99% confidence and a margin of error of + 0.50 minutes. Given this, what must the sample size be? (Hint: Convert Variance to Standard Deviation) A) 239 B) 366 C) 500 D) 414

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
icon
Related questions
Question
Past experience indicates that the variance in the time it takes for a "fast lube" operation to actually complete the
lube and oil change for customers is 9.00 minutes. The manager wishes to estimate the mean time with 99%
confidence and a margin of error of + 0.50 minutes. Given this, what must the sample size be? (Hint: Convert
Variance to Standard Deviation)
A) 239
B) 366
C) 500
D) 414
Transcribed Image Text:Past experience indicates that the variance in the time it takes for a "fast lube" operation to actually complete the lube and oil change for customers is 9.00 minutes. The manager wishes to estimate the mean time with 99% confidence and a margin of error of + 0.50 minutes. Given this, what must the sample size be? (Hint: Convert Variance to Standard Deviation) A) 239 B) 366 C) 500 D) 414
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill