For the situation in question 21 (the question i just asked), suppose it was known that the standard deviation of the population of salaries was...

For the situation in question 21 (the question i just asked), suppose it was known that the standard deviation of the population of salaries was $2500.

The standard error of the sample mean equals

Select one:

a. $259b. $790.57c. $2500d. None of the above.

Which of the following statements regarding confidence intervals is false?

Select one:

a. For a 95% confidence interval, using the Z distribution, the Z multiplier is 1.96.b. For a fixed sample size (n) as the confidence level of a confidence interval is increased the width of the confidence interval also increases.c. For a fixed confidence level, as the sample size increases the width of the interval increases.d. The Student’s t distribution should be used when the population standard deviation is unknown