All patients admitted to a particular hospital can be released on the same day or kept overnight for observation. In a sample of 2550 patients, 1020 were kept overnight for observation a) What is the point estimate ?̂ for the proportion of all patients kept overnight for observation? b) Construct a 99% confidence interval for the proportion of all patients kept overnight for observation.
Question 1
All patients admitted to a particular hospital can be released on the same day or kept overnight for observation. In a sample of 2550 patients, 1020 were kept overnight for observation
a) What is the point estimate ?̂ for the proportion of all patients kept overnight for observation?
b) Construct a 99% confidence interval for the proportion of all patients kept overnight for observation.
Question 2
Grace Floral Shop claims that their average daily earnings is $497. An auditor wants to determine whether this claim is true. The auditor randomly selected a sample of 100 days and found that the sample mean earnings was $495 with a sample standard deviation of 9.75.
a) Calculate the 97% confidence interval for the population mean daily earning.
Assist the auditor in conducting a hypothesis test, at the 3% level of significance, to determine whether the claim about their average daily earnings was overstated.
b) State the null and the alternative hypothesis for this test.
c) Using the p-value approach, state the decision rule for this test.
d) Calculate the value of the test statistic for this test.
e) Calculate the p-value for this test?
f) State the conclusion of this test. Give reason for your answer.
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