Provide an appropriate response. 8) Suppose you have obtained a 95% confidence i

Question

Provide an appropriate response.
8) Suppose you have obtained a 95% confidence interval for.Which of the following statements
is/are true regarding the relationship between precision andconfidence level? Assume that the
sample size is fixed.
A. Increasing the confidence level to 99% will result in a narrowerinterval.
B. Decreasing the confidence level to 90% will result in greaterprecision.
C. Decreasing the precision will result in a higher confidencelevel.
D. Increasing the precision will result in a higher confidencelevel.
A) A and D B) B and C C) B and D D) A and C
9) Suppose that you wish to obtain a confidence interval for apopulation mean. Under the conditions
described below, should you use the z-interval procedure, thet-interval procedure, or neither?
- The population standard deviation is unknown.
- The population is normally distributed.
- The sample size is small.
A) t-interval procedure B) Neither C) z-interval procedure

Explanation / Answer

A is false B is true C is true D is false b and d are true

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