Question

The heights of a random sample of 50 college students showed a mean of 174.5 centimeters...

The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. Construct a 98% confidence interval for:

a) the mean height

b) the standard deviation of heights of all college students. State assumptions.

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 heights of a random sample of 50 college students showed a mean of 174.5 centimeters...
The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. Construct a 98% confidence interval for: a) the mean height b) the standard deviation of heights of all college students. State assumptions.
The heights of 1000 students are approximately normally distributed with a mean of 174.5 centimeters and...
The heights of 1000 students are approximately normally distributed with a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. Suppose 200 random samples of size 25 are drawn from this population and the means recorded to the nearest tenth of a centimeter. Determine (a) the mean and standard deviation of the sampling distribution of X¯; (b) the number of sample means that fall between 171 and 177 cm.
The heights of 500,000 students are approximately normally distributed with a mean of 174.5 centimeters and...
The heights of 500,000 students are approximately normally distributed with a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. If 200 random samples of size 25 each are drawn from this population and the means are recorded to the nearest tenth of a centimeter, 1.Determine how many sample means that falls between 172.45 and 175.85 centimeters inclusive; 2.Determine how many sample means falls below 171.95 centimeters.
A random sample of 20 purchases showed the amounts in the table​ (in $). The mean...
A random sample of 20 purchases showed the amounts in the table​ (in $). The mean is ​$49.64 and the standard deviation is ​$23.80. ​a) Construct a 98​% confidence interval for the mean purchases of all​ customers, assuming that the assumptions and conditions for the confidence interval have been met. ​b) How large is the margin of​ error? ​c) How would the confidence interval change if you had assumed that the standard deviation was known to be ​$24​?
A student researcher compares the heights of American students and non-American students from the student body...
A student researcher compares the heights of American students and non-American students from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 12 American students had a mean height of 70.7 inches with a standard deviation of 2.41 inches. A random sample of 17 non-American students had a mean height of 62.7 inches with a standard deviation of 3.07 inches. Determine the 98% confidence interval for the true...
A student researcher compares the heights of American students and non-American students from the student body...
A student researcher compares the heights of American students and non-American students from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 18 American students had a mean height of 70.5 inches with a standard deviation of 2.26 inches. A random sample of 12 non-American students had a mean height of 65.8 inches with a standard deviation of 2.44 inches. Determine the 98% confidence interval for the true...
A student researcher compares the heights of American students and non-American students from the student body...
A student researcher compares the heights of American students and non-American students from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 12 American students had a mean height of 67.9 inches with a standard deviation of 2.08 inches. A random sample of 18 non-American students had a mean height of 64 inches with a standard deviation of 1.62 inches. Determine the 99 % confidence interval for the...
A random sample of 20 purchases showed the amounts in the table (in $). The mean...
A random sample of 20 purchases showed the amounts in the table (in $). The mean is $49.88 and the standard deviation is $20.86. a) Construct a 80% confidence interval for the mean purchases of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of error? c) How would the confidence interval change if you had assumed that the standard deviation was known to be $21?
1. Assume the students below are a random sample from the population of all college students...
1. Assume the students below are a random sample from the population of all college students 160 173 163 178 180 164 170 172 163 163 189 152 161 162 179 162 165 168 155 169 173 175 163 165 170 a. Construct a 99% confidence interval for the population mean college student height? Explain how you’ve got the numbers. b. Construct a 98% confidence interval for the population proportion of female college students. Explain how you’ve got the numbers....
A random sample of 20 students at a university showed an average age of 20.9 years...
A random sample of 20 students at a university showed an average age of 20.9 years and a sample standard deviation of 2.5 years. The 98% confidence interval for the true average age of all students in the university is? Enter in the upper limit of your confidence interval.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT