Time spent using email per session is normally distributed with a mean = 8 minutes and...
Homework Answers
As population is normally distributed and also sample size is
>30 so as per central limit theorem distribution of sample mean
is also normal with mean=
and standard deviation is 
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Time spent using email per session is normally distributed with a
mean = 8 minutes and...
Time spent using e-mail per session is normally distributed, with mu equals μ=9 minutes and sigma...
Time spent using e-mail per session is normally distributed, with mu equals μ=9 minutes and sigma equals σ=2 minutes. Assume that the time spent per session is normally distributed. Complete parts (a) through (d). a. If you select a random sample of 25 sessions, what is the probability that the sample mean is between 8.8 and 9.2 minutes? (Round to three decimal places as needed.) b. If you select a random sample of 25 sessions, what is the probability that...
Scenario 7.5 Time spent using e-mail per session is normally distributed with H 8 minutes and...
Scenario 7.5 Time spent using e-mail per session is normally distributed with H 8 minutes and o 2 minutes. If a random sample of 25 sessions is selected, answer the questions below. Question 16 1 pts Based on the information in Scenario 7.5, what is the probability that the sample mean is between 7.8 and 8.2 minutes? (4 decimals) Question 17 1 pts Based on the information in Scenario 7.5, what is the probability that the sample mean is between...
The time spent completing problem sets per week is normally distributed with a mean of 8...
The time spent completing problem sets per week is normally distributed with a mean of 8 hours and a standard deviation of 2 hours. What is the probability that at a randomly selected week, time spent on doing problem sets: a) will take more than 9 hours? b) will take less than 9.5 hours? c) will take less than 6 hours? If random samples of 25 weeks are taken, what proportion of the sample means: d) would be more than...
According to a social media blog, time spent on a certain social networking website has a...
According to a social media blog, time spent on a certain social networking website has a mean of 24 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 7 minutes. If you select a random sample of 36 sessions, what is the probability that the sample mean is between 23.5 and 24.5 minutes?
According to a social media blog, time spent on a certain social networking website has a...
According to a social media blog, time spent on a certain social networking website has a mean of 19 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 7 minutes. Complete parts (a) through (d) below a. If you select a random sample of 36 sessions, what is the probability that the sample mean is between 18.5 and 19.5 minutes? (Round to three decimal places as...
The time spent waiting in the line is approximately normally distributed. The mean waiting time is...
The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6 minutes and the standard deviation of the waiting time is 2 minutes. Find the probability that a person will wait for more than 8 minutes. Round your answer the four decimal places.
According to a social media blog, time spent on a certain social networking website has a...
According to a social media blog, time spent on a certain social networking website has a mean of 16 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 5 minutes. If you select a random sample of 144 sessions, what is the probability that the sample mean is between 15.5 and 16.5 minutes?
The time spent to arrive to the university is normally distributed with mean 10 minutes and...
The time spent to arrive to the university is normally distributed with mean 10 minutes and standard deviation 3. If classes start at 9:00 am, what time should students leave home so they will be late only 9% of the time? 10 minutes before 8 am b. 25 minutes before 8 am c.14 minutes before 8 am d. None Five motors (numbered 1 through 5) are available for use, two motors are defective. Motor 1 and 2 me from supplier...
According to a social media blog, time spent on a certain social networking website has a...
According to a social media blog, time spent on a certain social networking website has a mean of 22 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 55 minutes. Complete parts (a) through (d) below. a. If you select a random sample of 16 sessions, what is the probability that the sample mean is between 21.5 and 22.5 minutes?
The time spent waiting in the line is approximately normally distributed. The mean waiting time is...
The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6 minutes and the standard deviation of the waiting time is 2 minutes. Find the probability that a person will wait for more than 9 minutes. Round your answer to four decimal places.
Scenario 7.5 Time spent using e-mail per session is normally distributed with H 8 minutes and o 2 minutes. If a random sample of 25 sessions is selected, answer the questions below. Question 16 1 pts Based on the information in Scenario 7.5, what is the probability that the sample mean is between 7.8 and 8.2 minutes? (4 decimals) Question 17 1 pts Based on the information in Scenario 7.5, what is the probability that the sample mean is between...
According to a social media blog, time spent on a certain social networking website has a mean of 19 minutes per visit. Assume that time spent on the social networking site per visit is normally distributed and that the standard deviation is 7 minutes. Complete parts (a) through (d) below a. If you select a random sample of 36 sessions, what is the probability that the sample mean is between 18.5 and 19.5 minutes? (Round to three decimal places as...
The time spent to arrive to the university is normally distributed with mean 10 minutes and standard deviation 3. If classes start at 9:00 am, what time should students leave home so they will be late only 9% of the time? 10 minutes before 8 am b. 25 minutes before 8 am c.14 minutes before 8 am d. None Five motors (numbered 1 through 5) are available for use, two motors are defective. Motor 1 and 2 me from supplier...
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