Question

3. The term confidence level refers to:

a. the absolute number of interval estimates that can be expected to contain the actual value of the parameter being estimated when the same procedure of interval construction is used again and again

b. the percentage of interval estimates that can be expected to contain the actual value of the parameter being estimated when the same procedure of interval construction is used again and again

c. the range of values among which an unknown population parameter can presumably be found

d. the sum of an estimator's squared bias plus its variance, which indicates the degree to which it is consistent, efficient, and unbiased

e. both (b) and (c)

4. Find the p-value for the following large-sample z tests.

(a) a right-tailed test with observed z = 1.16

(b) a two-tailed test with observed z = −2.77

(c) a left-tailed test with observed z = −1.85

Answer 1

3. Term confidence interval refers to:

The percentage of interval estimates that can be expected to contain the actual value of the parameter being estimated when the same procedure of interval construction is used again and again.

And

The range of values among which an unknown population parameter can presumably be found.

Hence,

Option E is correct.

4. a) p - Value = P(z > 1.16) = 0.1230

b) p - Value = 2*P(z < -2.77) = 2*0.0028 = 0.0056

c) p - Value = P(z < -1.85) = 0.0322