Question

Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=218, x=33.1 hg, s=7.2 hg. The confidence level is 95%.

Name: assume that we want to construct a confidence interval do one of the following as appropriate a find the critical value t2 b find the critical value z2 or c state that neither the normal dis 86573
Uploaded: 2022-08-07T22:58:18-08:00
Duration: 3 min 33 s
Channel: T. L.
Description: assume that we want to construct a confidence interval do one of the following as appropriate a find the critical value t2 b find the critical value z2 or c state that neither the normal dis 86573

          Assume that we want to construct a confidence interval. Do one
of the following, as appropriate: (a) find the critical value
tα/2, (b) find the critical value zα/2, or (c) state that
neither the normal distribution nor the t distribution applies.
Here are summary statistics for randomly selected weights of
newborn girls: n=218, x=33.1 hg, s=7.2 hg. The confidence level
is 95%.

Added by Christina M.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert T. L.

08/07/2022

Step 1

Since the sample size is large (n > 30), we can use the normal distribution. However, since the population standard deviation is unknown and we are using the sample standard deviation, we should use the t-distribution. Second, we need to find the critical value Show more…

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Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=218, x=33.1 hg, s=7.2 hg. The confidence level is 95%.