Question

Construct a 90% confidence interval to estimate the population mean when x? = 133 and s = 26 for the sample sizes below. a) n = 30 b) n = 60 c) n = 80 a) The 90% confidence interval for the population mean when n = 30 is from a lower limit of to an upper limit of . (Round to two decimal places as needed.)

          Construct a 90% confidence interval to estimate the population mean when x? = 133 and s = 26 for the sample sizes below.
a) n = 30 b) n = 60 c) n = 80

a) The 90% confidence interval for the population mean when n = 30 is from a lower limit of to an upper limit of .
(Round to two decimal places as needed.)

Construct a 90% confidence interval to estimate the population mean when x? = 133 and s = 26 for the sample sizes below.
a) n = 30 b) n = 60 c) n = 80

a) The 90% confidence interval for the population mean when n = 30 is from a lower limit of to an upper limit of .
(Round to two decimal places as needed.)

Added by Antonia W.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Qudsiya Anis

08/09/2022

Step 1

Given: - Sample mean (X) = 133 - Standard deviation (σ) = 26 - Sample size (n) = 30 - Degrees of freedom = n - 1 = 30 - 1 = 29 - Critical t-value for 90% confidence level and 29 degrees of freedom = 1.699 Calculate the confidence interval: \[ \text{Lower Limit} Show more…

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Construct a 90% confidence interval to estimate the population mean when x̄ = 133 and s = 26 for the sample sizes below: a) n = 30 b) n = 60 c) n = 80 a) The 90% confidence interval for the population mean when n = 30 is from a lower limit of to an upper limit of (Round to two decimal places as needed.)