A random sample of 91 observations produced a mean xequals25.7 and a standard deviation sequals2.6. a....

A random sample of 91 observations produced a mean xequals25.7 and a standard deviation sequals2.6.

a. Find a 95% confidence interval for mu. b. Find a 90% confidence interval for mu. c. Find a 99% confidence interval for mu.

Solutions

Expert Solution

----------------------------------------------------------

----------------------------------------

orchestra answered 1 year ago

Next > < Previous

Related Solutions

A random sample of 91 observations produced a mean x̄ = 25.6 and a standard deviation...

A random sample of 91 observations produced a mean x̄ = 25.6 and a standard deviation s = 2.6. a. find a 95% confidence interval for μ. b. find a 90% confidence interval for μ. c. find a 99% confidence interval for μ.

A random sample of 91 observations produced a mean x=26.2 and a standard deviation s=2.6 a....

A random sample of 91 observations produced a mean x=26.2 and a standard deviation s=2.6 a. Find a 95% confidence interval for μ. b. Find a 90% confidence interval for μ. c. Find a 99% confidence interval for μ.

1. A random sample of 81 observations produced a mean value of 89 and standard deviation...

1. A random sample of 81 observations produced a mean value of 89 and standard deviation of 5.5. The 95% confidence interval for the population mean μ is between? a) 88.302 and 89.698 b) 87.302 and 90.698 c) 85.802 and 91.198 d) 87.995 and 90.005 e) 87.802 and 90.198

A random sample of 92 observations produced a mean xequals=25.9 and a standard deviation s=2.6 a....

A random sample of 92 observations produced a mean xequals=25.9 and a standard deviation s=2.6 a. Find a 95% confidence interval forμ. b. Find a 90% confidence interval for μ c. Find a 99% confidence interval for μ. (Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)

A random sample of 88 observations produced a mean x=25.8 and a standard deviation s=2.6. a....

A random sample of 88 observations produced a mean x=25.8 and a standard deviation s=2.6. a. Find a 95% confidence interval for mu. b. Find a 90% confidence interval for mu. c. Find a 99% confidence interval for mu.

A random sample of n=100 observations produced a mean of x̅=33 with a standard deviation of s=5.

A random sample of n=100 observations produced a mean of x̅=33 with a standard deviation of s=5. (a) Find a 95% confidence interval for μ Lower-bound: Upper-bound: (b) Find a 99% confidence interval for μ Lower-bound: Upper-bound:

A random sample of n=100 observations produced a mean of x̅=28 with a standard deviation of s=6.

Note: Each bound should be rounded to three decimal places. A random sample of n=100 observations produced a mean of x̅=28 with a standard deviation of s=6. (a) Find a 90% confidence interval for ?Lower-bound: Upper-bound: (b) Find a 99% confidence interval for ?Lower-bound: Upper-bound: (c) Find a 95% confidence interval for ?Lower-bound: Upper-bound:

A random sample of n=100 observations produced a mean of x̅=25 with a standard deviation of s=4.

A random sample of n=100 observations produced a mean of x̅=25 with a standard deviation of s=4. (a) Find a 90% confidence interval for μ, z for 90 percentile : 1.28 (b) Find a 95% confidence interval for μ, z for 95 percentile : 1.75 (c) Find a 99% confidence interval for μ, z for 99 percentile : 2.33

(4.1) A random sample of 89 observations produced a mean x = 26.1 and a standard...

(4.1) A random sample of 89 observations produced a mean x = 26.1 and a standard deviation s = 2.4 a. Find a? 95% confidence interval for ?. b. Find a? 90% confidence interval for ?. c. Find a? 99% confidence interval for ?. a. The? 95% confidence interval is (----,----) ?(Use integers or decimals for any numbers in the expression. Round to two decimal places as? needed.) b. The? 90% confidence interval is ----,------. (Use integers or decimals for...

A random sample of 105 observations produced a sample mean of 33. Find the critical and...

A random sample of 105 observations produced a sample mean of 33. Find the critical and observed values of z for the following test of hypothesis using α=0.025. The population standard deviation is known to be 9 and the population distribution is normal. H0: μ=28 versus H1: μ>28. Round your answers to two decimal places. zcritical = zobserved =

Subjects