1. A pharmaceutical company conducted a study to evaluate theeffectiveness and s
ID: 2915019 • Letter: 1
Question
1. A pharmaceutical company conducted a study to evaluate theeffectiveness and safety of a new inhaled form of insulin for thetreatment of diabetes. A group of 650 diabetics was given the drugtwice a day, while another group of 650 diabetics was given aninhaled placebo twice a day. Insulin levels were checkedperiodically; and the participants were asked to report any adverseside effects (nose bleeds, respiratory infections, nausea, etc.).(14 points)
a. What is the population?
b. What is the sample?
c. Is the study observational or experimental? Explain.
d. What are the independent and dependent variables?
e. For each of the variables identified in part d, what level ofmeasurement was used to obtain data from these variables?
f. Classify the variables identified in part d as either attributeor numerical.
g. What parameter(s) best characterize the effectiveness and safetyof the drug?
Explanation / Answer
a. What is the population? ALL DIABETICS
b. What is the sample? THE 1300 DIABETICS IN THE STUDY
c. Is the study observational or experimental? Explain. EXPERIMENT:RANDOM ASSIGNMENT TO GROUPS
d. What are the independent and dependent variables? INDEPENDENT:DRUG TYPE (ACTUAL DRUG OR PLACEBO); DEPENDENT: INSULIN LEVEL ANDSIDE EFFECTS
e. For each of the variables identified in part d, what level ofmeasurement was used to obtain data from these variables?
DRUG TYPE: NOMINAL; INSULIN LEVEL: CONTINUOUS; SIDE EFFECTS:NOMINAL
f. Classify the variables identified in part d as eitherattribute or numerical.
ATTRIBUTE, NUMERICAL, ATTIRBUTE
g. What parameter(s) best characterize the effectiveness andsafety of the drug?
AVERAGE CHANGE IN INSULIN LEVEL, PROPORTION OF PARTICIPANTS WITHEACH SIDE EFFECT
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