The shape of the distribution of the sime required to get an of through (c) ta 15-minute of-change facility is skewed ri

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The shape of the distribution of the sime required to get an of through (c) ta 15-minute of-change facility is skewed right However, records indicate that the mean time is 16.4 minutes, and the standard deviation is 36 minutes Complete parts (a) (a) To compute probabilites regarding the sample mean using the normal model, what sie sample would be required? OA Any sample size could be used OB. The sample size needs to be less than or equal to 30. OC. The normal model cannot be used if the shape of the distribution is skewed right OD. The sample size needs to be greater than or equal to 30. (b) What is the probability that a random sample of n 35 oll 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 ob-change facility wit perform 35 of changes between 10 AM and 12 PM. Treating this as a random sample, there would be a 10% chance of the mean of-change sime being at or below what value? This will be the goal established by the manag minutes There is a 10% chance of being at or below a man of-change time of (Round to one decimal place as needed)
The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is skewed ri through (c).
ht. However, records indicate that the mean time is 16.4 minutes, and the standard deviation is 3.6 minutes. Complete parts (a) ed? minutes? turday, the oil-change facility will perform 35 oil changes between 10 AM and 12 PM. Treating this as a random sample, there hed by the manager. & 87 7 U 8 8 1 ( 9 O ) 0 P Time Remaining: 01:24:11 { [ } ] Next delete
(a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required? OA. Any sample size could be used. B. The sample size needs to be less than or equal to 30. C. The normal model cannot be used if the shape of the distribution is skewed right. D. The sample size needs to be greater than or equal to 30. (b) What is the probability that a random sample of n = 35 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- 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 man minutes. There is a 10% chance of being at or below a mean oil-change time of (Round to one decimal place as needed.)
n 15 minutes? Saturday, the oil-change facility will perform 35 oil changes between 10 A.M. and 12 P.M. Treating this as a random sample, ther blished by the manager.