9. Goaty\'s (a fast food chain owned by Caprine Manufacturing) wishes to investi
ID: 3315635 • Letter: 9
Question
9. Goaty's (a fast food chain owned by Caprine Manufacturing) wishes to investigate the impact of goatweed on employee performance. After obtaining a sample of 200 random workers, they randomly select 100 of them to receive a small pouch of goatweed (one quarter ounce) with their next paycheck. The other 100 receive a small pouch of poison ivy instead. Then all 200 employees performance reviews (satisfactory/unsatisfactory) for the next month are observed to see if there are any discrepancies a. Would you classify this as an observational study or da controlled experiment? b. Describe the population(s) in this study c. Describe the variable(s) in this study. Don't forget to state what type of variable. d. What parameter(s) would it be appropriate to use to summarize the variable(s)? e. Are these samples dependent or independent? f. Suppose the researcher in charge of this study thinks that goatweed is bad for goats and expects it to harm their job performance. How would you write hypotheses describing this claim? Make surg to state both a null and an alternative. g. Of the goats that received the poison ivy. 83 had a satisfactory rating: meanwhile, 58 of the goats that received the goatweed received a satisfactory rating. Use this inf ormation to compute a P-Value for the study. h. At the 0.10 significance level, what would you conclude from the data?Explanation / Answer
a. This is a controlled experiment.
b. All the employees together comprise the population.
c. There are two categorical variables mentioned:
1) number of workers who received goatweed
2) number of workers who received poison ivy
d. Frequency or count of each variable under each category(Satisfactory/Unsatisfactory) is the appropriate parameter to be used to summarize the variables.
e. The samples in this case are dependent as the frequency of one variable increases/decreases with the decrease/increase in frequency of the other one.
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