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Ten asthmatics were asked to compare the effect of salbutamol and fenoterol sprays in relieving their asthma attacks. Assume that salbutamol and fenoterol are equal in terms of effectiveness and side effects in all people, so that the preferences expressed are simply the reflection of a 50-50 random choice.
a. With this assumption, what is the probability that
i) zero people prefer fenoterol to salbutamol?
ii) one prefers fenoterol?
iii) two prefer fenoterol?
iv) three prefer fenoterol?
v) four prefer fenoterol?
vi) five prefer fenoterol?
The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees.
Find out sample standard deviation (s) of scores Gordon Golfer made on his last four rounds (determine to the nearest one tenth, or .1).
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
Fix-It Copiers advertises mean time of 100 minutes for office calls with standard deviation of 25 minutes. What percentages of calls are completed?
Based on your answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
Test whether there is difference in the proportion of viewers using Chi square test.
For the first test, assume the data are from an independent-measures study using two separate samples.
Write a sample result section, discussing your data screening activity (this section should be in APA format).
Let independent variable x represent years since 1950. Determine quadratic regression model for per capita cigarette consumption.
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
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