The ____ a confidence level and a significance level should be _______. sum of:

Question

The ____ a confidence level and a significance level should be _______. sum of: zero The difference between; zero sum of one difference between; one product of one. Approximately 68% of observations in a normal distribution fall within an interval between ___ above and below the mean one (1) standard deviation two (2) standard deviations three (3) standard deviations one (1) inter-quartile two (2) inter-quartiles As a new Human Resources (HR) director, you found from a random sample of 16 people who left your firm that they had an average stay of 5 years at your firm with a population standard deviation of 2 years. If you are to construct a 95% confidence interval for an average job length for your employees, it is best for you to use ____ and _____ years a Z value; a standard deviation of 2 a t value; a standard deviation of 2 Z value; a standard error of 0.125 at value; a standard error of 0.125 Z value; a standard error of 0.5 As a new Human Resources (HR) director, you found from a random sample of 25 people who left your firm that they had an average stay of 5 years at your firm with a sample standard deviation of 3.3 years. If you are to construct a 95% confidence interval for an average job length for your employees, it is best for you to ____ use and ______years a Z value; a standard deviation of 3.3 a t value: a standard deviation of 3.3 a Z value; a standard error of 0.66 a t value; a standard error of 0.66 a Z value; a standard error of 0.132

Explanation / Answer

(6) The ----------------- of a confidence level and significance level should be---------

ANs:sum of;one (option C is correct)

(7) Approximately 68% of observations in a normal distrubution fall within an interval between ----------------- above and below the mean

Ans:one standard deviation (option a is correct)

(8) As a new human resources director you found from a random sample of 16 people who left your firm that they had an average stay of 5 years at your firm with a population standard deviation of 2 years .if you are to construct a 95% confidence interval for an average job length for your employees,it is best for to use ------ and ----- year

Ans:a Z value;a standard deviation 2(option a is correct)

(9) As a new human resources director you found from a random sample of 25 people who left your firm that they had an average stay of 5 years at your firm with a sample standard deviation of 3.3 years .if you are to construct a 95% confidence interval for an average job length for your employees,it is best for to use ------ and ----- year

Ans:a t value;a standard deviation 3.3(option b is correct)

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