as an aid in the establishment of personnel requirements, the director of a hosp

Question

as an aid in 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 24 hour period. the director randomly selects 64 different 24 hour periods and determina la the number of admissions for each. for this sample x= 17.8 and s2= 25. which of the following assumptions is necessary in order for a confidence interval to be valid?
A) the population sampled from has an approximate t distribution B). The mean of the sample equals the mean of the population C) the population sampled from has an approximate normal distribution D) none of these assumptions are necessary as an aid in 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 24 hour period. the director randomly selects 64 different 24 hour periods and determina la the number of admissions for each. for this sample x= 17.8 and s2= 25. which of the following assumptions is necessary in order for a confidence interval to be valid?
A) the population sampled from has an approximate t distribution B). The mean of the sample equals the mean of the population C) the population sampled from has an approximate normal distribution D) none of these assumptions are necessary as an aid in 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 24 hour period. the director randomly selects 64 different 24 hour periods and determina la the number of admissions for each. for this sample x= 17.8 and s2= 25. which of the following assumptions is necessary in order for a confidence interval to be valid?
A) the population sampled from has an approximate t distribution B). The mean of the sample equals the mean of the population C) the population sampled from has an approximate normal distribution D) none of these assumptions are necessary

Explanation / Answer

The selection of each 24 hours constitute a sample. It is given that 64 different 24 hours are selected at random and so, the number of samples is 64. Since the size of each sample is not mentioned, so, it is not sure that the population sampled appoximately follows t distribution.

The assumption B is not true, because mean of the sample mean is the population mean.

Since, the concept of confidence interval is based on normal curve, so the assumption C is necessary..

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