Question

Annual income: The mean annual income for people in a certain city (in thousands of dollars)...

Annual income: The mean annual income for people in a certain city (in thousands of dollars) is 43, with a standard deviation of 23. A pollster draws a sample of 91 people to interview.

(a) What is the probability that the sample mean income is less than 40? Round the answer to at least four decimal places. The probability that the sample mean income is less than 40 is . Part 2 of 5

(b) What is the probability that the sample mean income is between 41 and 44? Round the answer to at least four decimal places. The probability that the sample mean income is between 41 and 44 is . Part 3 of 5

(c) Find the 70th percentile of the sample mean. Round the answer to at least one decimal place. The 70th percentile of the sample mean is . Part 4 of 5

(d) Would it be unusual for the sample mean to be less than 38? Round the answer to at least four decimal places. It ▼(Choose one) unusual because the probability of the sample mean being less than 38 is .

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
the mean annual income for people in a certain city is 46 (thousands of dollars), with...
the mean annual income for people in a certain city is 46 (thousands of dollars), with a standard deviation of 42. A pollster draws a sample of 60 people to interview. What is the probability that the sample mean income is less than 42 (thousands of dollars)?
The Internal Revenue Service reports that the mean federal income tax paid in the year 2010...
The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $5000. The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law. A) What is the probability that the sample mean tax is less than $7900? Round the answer to at least four decimal places. B) What is the probability that the sample mean tax is between...
27) The mean salary of people living in a certain city is $37,500 with a standard...
27) The mean salary of people living in a certain city is $37,500 with a standard deviation of $1,614. A sample of 49 people is selected at random from those living in the city. Find the probability that the mean income of the sample is less than $38,000. Round your answer to 4 decimal places. Please explain each step in detail.
27) The mean salary of people living in a certain city is $37,500 with a standard...
27) The mean salary of people living in a certain city is $37,500 with a standard deviation of $1,614. A sample of 49 people is selected at random from those living in the city. Find the probability that the mean income of the sample is less than $38,000. Round your answer to 4 decimal places. Please show all steps and explain in detail. Thank you!
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S....
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2013 was 2.24. Assume the standard deviation is1.1 . A sample of 80 households is drawn. Use the Cumulative Normal Distribution Table if needed. A. What is the probability that the sample mean number of TV sets is greater than 2? Round your answer to four decimal places. B. What is the probability that the sample mean number of TV sets is...
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S....
TV sets: According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2013 was 2.24. Assume the standard deviation is 1.3. A sample of 90 households is drawn. A) What is the probability that the sample mean number of TV sets is greater than 2? Round your answer to four decimal places. B) What is the probability that the sample mean number of TV sets is between 2.5and 3? Round your answer to four...
1) The mean per capita income is 21,053 dollars per annum with a standard deviation of...
1) The mean per capita income is 21,053 dollars per annum with a standard deviation of 805 dollars per annum. What is the probability that the sample mean would be less than  20876 dollars if a sample of 71 persons is randomly selected? Round your answer to four decimal places. 2) Assume the random variable X has a binomial distribution with the given probability of obtaining a success. Find the following probability, given the number of trials and the probability of...
The mean per capita income is 17,145dollars per annum with a standard deviation of 505 dollars...
The mean per capita income is 17,145dollars per annum with a standard deviation of 505 dollars per annum. What is the probability that the sample mean would differ from the true mean by greater than 40 dollars if a sample of 466 persons is randomly selected? Round your answer to four decimal places.
Among all the state income tax forms filed in a particular state, the mean income tax...
Among all the state income tax forms filed in a particular state, the mean income tax paid was μ=$1950 and the standard deviation was σX=$490 . As part of a study of the impact of a new tax law, a sample of 100 income tax returns is examined. What is the probability that the sample mean of these 100 returns is greater than $2050? Would this be unusual? Round your probability to four decimal places.
For a sample of nequals64​, find the probability of a sample mean being less than 24.6...
For a sample of nequals64​, find the probability of a sample mean being less than 24.6 if m=25 and sigma=1.15. view page 1 of the standard normal table. For a sample of n=64​, the probability of a sample mean being less than 24.6 if mu = 25 and sigma =1.15 is nothing. ​(Round to four decimal places as​ needed.) Would the given sample mean be considered​ unusual? The sample mean ▼ would not /would be considered unusual because it has...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT