Question Heip Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t12, (b) find the critical value z, 12, 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= 249, x = 29.9 hg, s=7.9 hg. The confidence level is 99%. 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. z,12= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.

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**Constructing a Confidence Interval**

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: \( n = 249, \overline{x} = 29.9 \, \text{hg} \), \( s = 7.9 \, \text{hg} \). The confidence level is 99%.

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.

Click to select and enter your answer(s) and then click Check Answer.

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*Note: The question includes a computer interface with options to input values and check the answers. No graphs or diagrams are present in the given text.*
Transcribed Image Text:**Constructing a Confidence Interval** 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: \( n = 249, \overline{x} = 29.9 \, \text{hg} \), \( s = 7.9 \, \text{hg} \). The confidence level is 99%. 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. Click to select and enter your answer(s) and then click Check Answer. [Check Answer] [Clear All] All parts showing [Progress Bar] *Note: The question includes a computer interface with options to input values and check the answers. No graphs or diagrams are present in the given text.*
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