As an aid to the establishment of personnel requirements,the director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period.The director randomly selects 64 different 24-hour periods and determines the number of admissions for each.For this sample, = 396 and S = 100.Which of the following assumptions is necessary in order for a confidence interval to be valid?
A)The population sampled from has an approximate normal distribution.
B)The population sampled from has an approximate t distribution.
C)The mean of the sample equals the mean of the population.
D)None of these assumptions are necessary.

Question

As an aid to the establishment of personnel requirements,the director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period.The director randomly selects 64 different 24-hour periods and determines the number of admissions for each.For this sample,  = 396 and S = 100.Which of the following assumptions is necessary in order for a confidence interval to be valid?
A)The population sampled from has an approximate normal distribution. 
B)The population sampled from has an approximate t distribution. 
C)The mean of the sample equals the mean of the population. 
D)None of these assumptions are necessary.

Quizplus · Accepted Answer

The Answer of As an aid to the establishment of personnel requirements,the director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period.The director randomly selects 64 different 24-hour periods and determines the number of admissions for each.For this sample,  = 396 and S = 100.Which of the following assumptions is necessary in order for a confidence interval to be valid?
A)The population sampled from has an approximate normal distribution. 
B)The population sampled from has an approximate t distribution. 
C)The mean of the sample equals the mean of the population. 
D)None of these assumptions are necessary.

As an Aid to the Establishment of Personnel Requirements,the Director