Statistics homework quiz due in 1hr quick response only

 

3. Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places.

98% confidence; the sample size is 800, of which 40% are successes 

Select one:

 

4. 50 people are selected randomly from a certain population and it is found that 12 people in the sample are over 6 feet tall. What is the point estimate of the proportion of people in the population who are over 6 feet tall?

Select one:

 

5. Thirty randomly selected students took the calculus final. If the sample mean was 95 and the standard deviation was 6.6, construct a 99% confidence interval for the mean score of all students.

Select one:

 

6. Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.028; confidence level: 99%;  and  unknown

Select one:

 

7. Find the appropriate critical value for the following:

 99% confidence level ; n = 17; σ is unknown; population appears to be normally distributed.

Select one:

 

8. Find the critical value χ2R corresponding to a sample size of 19 and a confidence level of 99 percent if the test it two-tailed.

Select one:

 

9. Find the critical value χ 2L corresponding to a sample size of 19 and a confidence level of 99 percent if the test is two-tailed.

Select one:

 

10. To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19 randomly selected dowels and finds the standard deviation of the sample to be s = 0.16. Find the 95% confidence interval for the population standard deviation σ.

"Get 15% discount on your first 3 orders with us"
Use the following coupon
"FIRST15"

Order Now