To construct a confidence interval using the given confidence level, do whicheve

Question

To construct a confidence interval using the given confidence level, do whichever of the following is appropriate. (a) Find the critical value za/2. (b) find the critical value tu/2. or (c) state that neither the normal nor the t distribution applies 95%, n = 300, = 130; population appears to be skewed Click here to view a table of critical t-values Click here to view page 1 of the standard normal table. Click here to view page 2 of the standard normal table Choose the correct answer belovw A·4/2 = 1.968 B. Za/2-2575 O C. za/2 1.96 D. tu/2=2.592 0 E. Neither the normal nor the t distribution applies. ceececeet

Explanation / Answer

Solution:- (C) zalpha/2 = 1.96

We will use z-score for calculating the 95% confidence interval, beacuse sample size is larger than 30 and the population standard deviation is known.

zalpha/2 = 1.96

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