A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local hospital. a. Provide a 95% confidence interval for all the patients who are referred to the health centre by the hospital. b.What sample size would be required to estimate the proportion of all hospital referrals to the health centre with a margin of error of 0.04 or less at 95% confidence?
problem 1
A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local
hospital.
a. Provide a 95% confidence interval for all the patients who are referred to the health centre by
the hospital.
b.What sample size would be required to estimate the proportion of all hospital referrals to the
health centre with a margin of error of 0.04 or less at 95% confidence?
problem 2
The data in the table below presents the hourly quantity of production for three lines of production
processes over the first 4 days in XYZ Company. Answer the questions based on the Excel Output given
below.
Day Process 1 Process 2 Process 3
1 33 33 28
2 30 35 36
3 28 30 30
4 29 38 34
a.State the null and alternative hypothesis for single factor ANOVA.
b. State the decision rule (α = 0.05).
c. Calculate the test statistic.
d. Make a decision.
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