QUESTION 20 The weight of a Branflakes box of cereal has a mean of 500 grams and a standard deviation of 6 grams. If 36 boxes are randomly selected, then the distribution of the mean weight of these boxes is O Exactly normal with mean 500 grams and standard deviation 1 gram O Approximately normal with mean 500 grams and standard deviation 1 gram O Approximately normal with mean 500 grams and standard deviation 6 grams O Can't be determined without more information

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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QUESTION 20
The weight of a Branflakes box of cereal has a mean of 500 grams and a standard deviation of 6 grams. If 36 boxes are randomly selected, then the distribution of the mean weight of
these boxes is
O Exactly normal with mean 500 grams and standard deviation 1 gram
O Approximately normal with mean 500 grams and standard deviation 1 gram
O Approximately normal with mean 500 grams and standard deviation 6 grams
O Can't be determined without more information
QUESTION 21
The mean customer waiting time in a checkout line at Lulu Hypermarket is 26 seconds with a standard deviation of 6 seconds. Find the probability that the mean customer waiting time
in a checkout line for a random sample of 64 Lulu customers is between 25.5 and 27.5 seconds? Round your answer to 4 decimal digits.
QUESTION 22
The mean time for an oil change at ADNOC stations is 11.5 minutes with a standard deviation of 3 minutes. What is the probability that a random sample of 16 oil changes results in a
sample mean time of less than 10 minutes?
O 0.0343
O Probability can't be computed from the given information.
O 0.0228
O 0.3085
Transcribed Image Text:QUESTION 20 The weight of a Branflakes box of cereal has a mean of 500 grams and a standard deviation of 6 grams. If 36 boxes are randomly selected, then the distribution of the mean weight of these boxes is O Exactly normal with mean 500 grams and standard deviation 1 gram O Approximately normal with mean 500 grams and standard deviation 1 gram O Approximately normal with mean 500 grams and standard deviation 6 grams O Can't be determined without more information QUESTION 21 The mean customer waiting time in a checkout line at Lulu Hypermarket is 26 seconds with a standard deviation of 6 seconds. Find the probability that the mean customer waiting time in a checkout line for a random sample of 64 Lulu customers is between 25.5 and 27.5 seconds? Round your answer to 4 decimal digits. QUESTION 22 The mean time for an oil change at ADNOC stations is 11.5 minutes with a standard deviation of 3 minutes. What is the probability that a random sample of 16 oil changes results in a sample mean time of less than 10 minutes? O 0.0343 O Probability can't be computed from the given information. O 0.0228 O 0.3085
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