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Exercise 11.02 (Self-Test) Algorithmic eBook Video A sample of 20 items provides a sample standard deviation of 6. a. Compute the 90% confidence interval estimate of the population variance (to 2 decimals). Use Table 11.1. b. Compute the 95% confidence interval estimate of the population variance (to 2 decimals). Use Table 11.1. < < c. Compute the 95%confidence interval estimate of the population standard deviation (to 1 decimal). Use Table 11.1. sos 0 Icon Key Exercise 11.02 (Self-Test) Algorithmic

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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

A simple random sample of 400 individuals provides 100 Yes responses.
 
a. What is the point estimate of the proportion of the population that would provide Yes responses (to 2 decimals)?
 
b. What is your estimate of the standard error of the proportion (to 4 decimals)?
 
c. Compute the 95% confidence interval for the population proportion (to 4 decimals).

A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is 15 .

a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place.
( ,  )

b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.
( ,  )

c. What is the effect of a larger sample size on the interval estimate?

Larger sample provides a  margin of error.
 

Consider the following hypothesis test:

H0: µ = 20
Ha: µ < 20
A sample of 50 provided a sample mean of 19.4. The population standard deviation is 2.
a. Compute the value of the test statistic (to 2 decimals).

b. What is the p-value (to 3 decimals)?

c. Using a = .05, can it be concluded that the population mean is less than 20?

d. Using a = .05, what is the critical value for the test statistic?

e. State the rejection rule: Reject H0 if z is the critical value.
f. Using a = .05, can it be concluded that the population mean is less than 20

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