Mathematics, 25.02.2020 19:54 Moo12345
The shape of the distribution of the time required to get an oil change at a 10-minute oil-change facility is unknown. However, records indicate that the mean time is 11.9 minutes, and the standard deviation is 4.8 minutes.
Complete parts (a) through (c):
(a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required?
A. The normal model cannot be used if the shape of the distribution is unknown.
B. The sample size needs to be less than or equal to 30.
C. The sample size needs to be greater than or equal to 30.
D. Any sample size could be used.
(b) What is the probability that a random sample of n 35 oil changes results in a sample mean time less than 20 minutes? (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 35 oil changes between 10 A. M. and 12 P. 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?
Answers: 3
Mathematics, 21.06.2019 17:00
At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%
Answers: 1
Mathematics, 21.06.2019 18:50
The volume of a cone is 37x3 cubic units and its height is x units. which expression represents the radius of the cone's base, in units? 1 s o 3x o 6x obx 93x2
Answers: 1
Mathematics, 21.06.2019 21:30
This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )
Answers: 3
The shape of the distribution of the time required to get an oil change at a 10-minute oil-change fa...
Social Studies, 25.08.2019 17:10
History, 25.08.2019 17:10
Geography, 25.08.2019 17:10
Social Studies, 25.08.2019 17:10
Mathematics, 25.08.2019 17:10
Chemistry, 25.08.2019 17:10
Chemistry, 25.08.2019 17:10
English, 25.08.2019 17:10
History, 25.08.2019 17:10
Health, 25.08.2019 17:10
History, 25.08.2019 17:10