= 9.3
= 1.1
n = 70
SE = /
= 1.1/ = 0.1315
To find P(< 9.1):
Z = ( - )/SE
=(9.1 - 9.3)/0.1315 = - 1.5212
Table of Area Under Standard Normal Curve gives area = 0.4357
So
P(<9.1) = 0.5 - 0.4357 = 0.0643
So,
Answer is:
0.0643
Solve the problem. Suppose that replacement times for washing machines are normally distributed with a mean...
Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation of 1.1 years. Find the replacement time that separates the top 3% from the bottom 97% . Round your answer to 3 decimal places.
Suppose that replacement times for washing machines are normally distributed with a mean of 11 years and a standard deviation of 19 years Find the replacement time that separates the top 18 from the botom 82% Round to the neareste Click to view.nage the love of the O A 12 years OB 127 years O C. 113 years OD 9 years
Replacement times for televisions are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years. Find the probability that a randomly selected television will need a replacement time less than 6 years.
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
11. (18 points on the replacement times for washing machines woman 3 years and standard deviation of 1.1 year. Find the probability that to domly selected we are a replacement Round your answer to decimal places. Show how you get your answer. 12.12 points The way of here in one come and standard deviation of what is the protect at a randomly died wachers or 15 per week? Round your answer to decimal places Show how you get your answer....
Question 9 (1 point) Suppose that replacement times for washing machine parts are normally distributed with a mean of 12.3 years and a standard deviation of 2.1 years. Find the oth percentile. Round to 1 decimal place. 9.4 years 14.1 years 12.7 years 15.2 years
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 15.4 years and a standard deviation of 1.4 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 12.6 years? P(X < 12.6 years) If the company wants to provide a warranty so that only 3.2% of the quartz time pieces will be replaced before the warranty expires, what is the time...
Company XYZ know that replacement times for the DVD players it produces are normally distributed with a mean of 6.7 years and a standard deviation of 1.6 years. Find the probability that a randomly selected DVD player will have a replacement time less than 2.2 years? P(X < 2.2 years) = Enter your answer accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. If the company wants to provide a...
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 11 years and a standard deviation of 1.8 years. a) Find the probability that a randomly selected quartz time piece will have a replacement time less than 7.58 years? b) If the company wants to provide a warranty so that only 0.8% of the quartz time pieces will be replaced before the warranty expires, what is the time length of...
Suppose the weights of Farmer Carl's potatoes are normally distributed with a mean of 9 ounces and a standard deviation of 1.1 ounces. Round your answers to 4 decimal places. If one potato is randomly selected, find the probability that it weighs less than 10 ounces.