Test: Test 5 - Chapter 7 Time Remaining: 01:23:47 Submit Te This Question: 1 pt

Question

Test: Test 5 - Chapter 7 Time Remaining: 01:23:47 Submit Te This Question: 1 pt 8 of 13 (0 complete) This Test: 13 pts possi To construct a contidence 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 t/2, or (c) state that neither the normal nor the t distribution applies 90%; n 3000 is unknown, population appears to be skewed k here to Click here to view.page 2 of the standard normal table Choose the correct answer below O A. ta/2 1.650 O c. za/2-2.575 O E. Nether the normal nor the I distribution applies OType here to 3 4 5

Explanation / Answer

Correct answr: option (A) 1.65

In excel,

=TINV(0.1,300)

Given population SD is not known so we use t distribution

If the population SD is known then we must use Z distribution

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