Question

A random sample of 36 people in Wollongong was found to have an average yearly income...

A random sample of 36 people in Wollongong was found to have an average yearly income of $65,000 with variance $25,000. What is the probability that the yearly salary average of all Wollongong workers is between $63,000 and $67,000? Select one:

a. 0.996

b. 0.3108

c. 0.9836

d. 0.6216

e. None of the above.

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
A random sample of 50 airline pilots had an average yearly income of $103,450 with a...
A random sample of 50 airline pilots had an average yearly income of $103,450 with a standard deviation of $10,000. 1. if we want to determine a 90% co fidence interval for the average yearly income, what is the value of t? 2. Develop a 90% confidence interval for the average yearly income of all pilots.
- In a random sample of 200 physicians, 36 were found to have an annual salary...
- In a random sample of 200 physicians, 36 were found to have an annual salary of at least $400,000. 1. Can you conclude that the ratio of a physician with an annual salary of at least $400,000 at a 1% significance level is less than 0.24? Test by hypothesis setting, rejection reverse setting, and calculation of test statistics. 2. Obtain a p value and explain how it can be used for hypothesis testing. 3. Obtain a 99% confidence interval...
6. A random sample of 80 federal government workers found that the average annual salary for...
6. A random sample of 80 federal government workers found that the average annual salary for federal government employees in Iowa was $51,340 during 2019. Assuming the population standard deviation was σ = $5000 and that we want to use a 99% confidence interval to answer the following questions. (a) What is the margin of error? (b) What is the confidence interval for the average annual salary for federal employees? Question 1 margin of error Question 2 confidence interval for...
In a random sample of 1,000 people, it is found that 6% have a liver ailment....
In a random sample of 1,000 people, it is found that 6% have a liver ailment. Of those who have a liver ailment, 6% are heavy drinkers, 50% are moderate drinkers, and 44% are nondrinkers. Of those who do not have a liver ailment, 11% are heavy drinkers, 45% are moderate drinkers, and 44% are nondrinkers. If a person is chosen at random, and he or she is a heavy drinker, what is the empirical probability of that person having...
You take a random sample of 500 people from the city of Salinas and find that...
You take a random sample of 500 people from the city of Salinas and find that their average income is $45,000 per year with a standard deviation of $10,000; also assume that income for Salinas community is normally distributed, and that you have excluded extreme data points or outliers from your sample: Approximately how many people in your sample make less than $35,000 per year? Approximately how many people in your sample make between $25,000 and $55,000?
You have a normally distributed population with 2000 people. The average height for this population is...
You have a normally distributed population with 2000 people. The average height for this population is 5.5 feet and the variance for the population is 0.25. a) The probability that a randomly selected person has a height between 5 and 6 feet b)The probability that the mean of sample is less than 5.4 feet c) You have a slightly skewed population with 2000 people, you randomly select 37 people from this population and measure each person's height. Can you use...
Market researchers selected a random sample of people from region A and a random sample of...
Market researchers selected a random sample of people from region A and a random sample of people from region B. The researchers asked the people in the samples whether they had tried a new product. The difference between the sample proportions (B minus A) of people in the regions who indicated they had tried the new product was 0.15. Under the assumption that all conditions for inference were met, a hypothesis test was conducted with the alternative hypothesis being that...
Suppose you have data regarding the yearly wages of workers before and after they obtained an...
Suppose you have data regarding the yearly wages of workers before and after they obtained an associates degree. If you wanted to use this data to test whether workers earn higher wages with an associates degree than without, which test statistic would be appropriate? Select one: a. Two-sample t-test assuming equal variances b. Two-sample t-test assuming unequal variances c. Paired two-sample t-test d. Any of the above e. Only (a) and/or (b)
In a random sample of 70 people, it was found that 44 of them were fans...
In a random sample of 70 people, it was found that 44 of them were fans of the New York Yankees. What is the margin of error for the true proportion of all individuals who are fans of the New York Yankees? A. 0.0088 B. 0.058 C. 0.063 D. 0.116 E. 0.173
6. In a sample of 300 houses, the sample average price was found to be $196,340....
6. In a sample of 300 houses, the sample average price was found to be $196,340. Assume the variance of house prices is 120,000,000. Let random variable X denote house price, and μ denote its unknown population mean, E(X) = μ. For each of the following questions, formulate the appropriate null and alternative hypotheses, perform the test, and interpret test results: a. Is the average house price below $200,000? b. Is the average house price above $200,000? c. Is the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT