Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to/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=212, x= 31.6 hg, s= 6.3 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2= (Round to two decimal places as needed.) O B. a/2 = (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to/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=212, x= 31.6 hg, s= 6.3 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2= (Round to two decimal places as needed.) O B. a/2 = (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![**Constructing a Confidence Interval for Newborn Weights**
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value \( t_{\alpha / 2} \), (b) find the critical value \( z_{\alpha / 2} \), or (c) state that neither the normal distribution nor the t-distribution applies.
Here are summary statistics for randomly selected weights of newborn girls:
- Sample size (\( n \)): 212
- Sample mean (\( \bar{x} \)): 31.6 hg
- Sample standard deviation (\( s \)): 6.3 hg
- The confidence level is 95%.
-----
## Instructions:
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
- **A.** \( t_{\alpha / 2} = \) \[ \_\_\_\_\_\_ \]
- (Round to two decimal places as needed.)
- **B.** \( z_{\alpha / 2} = \) \[ \_\_\_\_\_\_ \]
- (Round to two decimal places as needed.)
- **C.** Neither the normal distribution nor the t-distribution applies.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa19999fe-5ff0-4da5-8e70-0a6e9b11cafb%2F6917ef5c-381c-4858-842f-6914f092d8a8%2Fqqompus_processed.png&w=3840&q=75)
Transcribed Image Text:**Constructing a Confidence Interval for Newborn Weights**
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value \( t_{\alpha / 2} \), (b) find the critical value \( z_{\alpha / 2} \), or (c) state that neither the normal distribution nor the t-distribution applies.
Here are summary statistics for randomly selected weights of newborn girls:
- Sample size (\( n \)): 212
- Sample mean (\( \bar{x} \)): 31.6 hg
- Sample standard deviation (\( s \)): 6.3 hg
- The confidence level is 95%.
-----
## Instructions:
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
- **A.** \( t_{\alpha / 2} = \) \[ \_\_\_\_\_\_ \]
- (Round to two decimal places as needed.)
- **B.** \( z_{\alpha / 2} = \) \[ \_\_\_\_\_\_ \]
- (Round to two decimal places as needed.)
- **C.** Neither the normal distribution nor the t-distribution applies.
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