Could you please walk me through the steps/formulas I am supposed to use? Thank

Question

Could you please walk me through the steps/formulas I am supposed to use? Thank you so much

As an aid to the establishment of personnel requirements, the director of a local 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 Xbar= 396 and S=100. Using the sample standard deviation as an estimate for the population standard deviation, what size sample should the director choose if she wants to estimate the mean number of admissions per 24-hour period to within 1 admission with 99% reliability?

Explanation / Answer

xbar = 396

S = 100

E = 1

Z value of 99% = 2.58

E = S*Z /sqrt(n)

n = ((100*2.58)/1)^2

n = 66564

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.