Statistics for Health Care Professionals
Problems Answer the following problems. Be sure to use the excel template
provided to incorporate your answers and provide detail of the work to substantiate
your answers. Note you MUST show the work involved in getting answers to get
credit. Listing answers with no work shown will result in a zero grade.
1. A research center estimates that no more than 40% of US adults eat
breakfast every day. In a random sample of 250 adults 41.6% say they eat
breakfast every day. Conduct a hypothesis test at alpha = .01 to determine if
thereis enough evidence to reject the researches claim. (20 pts)
2. The attached excel spreadsheet (Problem 2 tab) contains data of the amount
of medical supplies that customers spend in a given month at a medical supply
store. Assume this data represents a sample. Recent history has shown that a
customer spends on average more than $95at this store in a given month.
a. Conduct a one sided hypothesis test at a level of significance of .10 to
determine if the sample meets this criteria. (35 Pts)
b. What is the 90% confidence Interval for sample data
c. Is there a significance difference if a T or Z distribution is used for the
evaluation? Explain?
3. Studies from the FDA shows that a particular strain of bacteriainfection
will no longer be contagious if exposure is ordained beyond 36 hours as the
bacteria dies within the 36 hours. A study was conducted on 121 samples of the
bacteria infection. The samples revealed that the bacteria died on average of36.8
hours with a standard deviation of 7.25 hours (25 pts)
a. Test if the 121 sample meets the 36 hour requirement at the = .05 level
of significance
b. What is the 95% confidence interval values for this study sample
4. General Hospital has been selected to test the effectiveness of a drug to
treat bi-polar disorder. Recent studies have shown that the drug is effective to
83% of patients who were administered the drug. You are the director of research
at the hospital and you have been asked by the CDC to conduct a test of your
patients by administering the drug to selected patients and determining
effectiveness based on a plan provided by the CDC (20 pts)
a. Will the study that you conduct be an observation or an experiment
Explain?
b. Do you need to use a placebo effect for this study
c. Assume you select 137 patients for the study who were administered the drug
to treat bi-polar disorder. The drug was effective on 106 out of the 137 patients.
To conclude the study you are to conduct a hypothesis test at a level of
significance of .05. Does the study meet the criteria of recent studies (83%)?
