T-critical value and standard error of the sample mean

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Reference no: EM1321190

1. The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.

What is the 95 percent confidence interval?

a. 46 to 50
b. 46.08 to 53.92
c. 46.80 to 53.29
d. 48 to 52

2. As the confidence level 1 - α increases, the width of the confidence interval.

a. increases

b. decreases

c. remains the same

d. None of the above

Reference no: EM1321190

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