... a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required? O A. The sample size needs to be greater than or equal to 30. O B. The normal model cannot be used if the shape of the distribution is skewed right. O C. The sample size needs to be less than or equal to 30. O D. Any sample size could be used. b) What is the probability that random sample of n= 40 oil changes results in a sample mean time less than 15 minutes? The probability is approximately. Round to four decimal places as needed.) c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saturday, the oil-change facility will perform 40 oil changes between 10 A.M. and 12 .M. Treating this as a random sample, there would be a 10% chance of the mean oil-change time being at or below what value? This will be the goal established by the manager. There is a 10% chance of being at or below mean oil-change time of minutes.
... a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required? O A. The sample size needs to be greater than or equal to 30. O B. The normal model cannot be used if the shape of the distribution is skewed right. O C. The sample size needs to be less than or equal to 30. O D. Any sample size could be used. b) What is the probability that random sample of n= 40 oil changes results in a sample mean time less than 15 minutes? The probability is approximately. Round to four decimal places as needed.) c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saturday, the oil-change facility will perform 40 oil changes between 10 A.M. and 12 .M. Treating this as a random sample, there would be a 10% chance of the mean oil-change time being at or below what value? This will be the goal established by the manager. There is a 10% chance of being at or below mean oil-change time of minutes.
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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