2. The width of white board markers manufactured by a company is approximately normally distributed with a mean of 12 mm (millimetres) and a standard deviation of 4 mm. If a random sample of size 16 white board markers is selected, what is a) the distribution of the mean? b) the probability that the sample mean is less than 15.6 mm? the probability that the sample mean is between 12.8 mm and 13.2 mm? c)
2. The width of white board markers manufactured by a company is approximately normally distributed with a mean of 12 mm (millimetres) and a standard deviation of 4 mm. If a random sample of size 16 white board markers is selected, what is a) the distribution of the mean? b) the probability that the sample mean is less than 15.6 mm? the probability that the sample mean is between 12.8 mm and 13.2 mm? c)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Please help with number 2a,b,c
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175%
with a mean of 12.4 minutes and a standard deviation of 2.1 minutes.
a) What proportion of patients completes the medical history form in 10 minutes or less?
b) What proportion of patients takes 20 minutes or more to complete the medical history form?
c) What is the 90th percentile of the time to complete the medical history form?
The width of white board markers manufactured by a company is approximately normally
distributed with a mean of 12 mm (millimetres) and a standard deviation of 4 mm. If a random
sample of size 16 white board markers is selected, what is
a) the distribution of the mean?
2.
b) the probability that the sample mean is less than 15.6 mm?
c) the probability that the sample mean is between 12.8 mm and 13.2 mm?
3. Of the population of customers ofa store, a proportion of 0.4 are not satisfied with the service
offered by the store. In a random sample of 400 customers, what is the probability that between
156 and 240 customers will be satisfied with the service offered by the store?
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