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Many women take oral contraceptives to prevent pregnancy. Under ideal conditions,1% of women taking the pill become pregnant with in one year. In typical use, however, 5% become pregnant.
A study of the effectiveness of oral contraceptives interviews a random sample of 20 women who are taking the pill.
Based on the information about typical use, what is the probability that at least 25 of these women become pregnant in the next year? Is the Normal approximation permissible?
Compute the 95% confidence interval for the population proportion of registered voters who favor the slow growth initiative.
Identify the independent and dependent variables, and Construct a nominal, ordinal, and interval level measure for each independent and dependent variable.
Identify at least 2 variables for which you would utilize a repeated-measures ANOVA in your analysis. Describe the variables and their scale of measurement.
A man is in the process of buying a new car. He has a choice of 3 engine makes, 7 body styles and 10 colors. How many different cars does he have to choose from?
From past experience, an automobile insurance company knows that a given automobile will suffer a total loss with probability .02, a 50% loss with probability .08, or a 25% loss with probability .15 during a year.
SmartPeople is an organization that only admits people with IQ's in the top 98 percentile. What IQ score would a person need to be a member of SmartPeople?
According to recent surverys, 53% of households have personal computers. if a random sample of 175 households is selected, what is the probability that more then 75 but fewer than 110 have a personal computer?
This sample group has errors with a standard deviation of 54.7ft. At the 5% level of significance, test that the new population has errors with a standard deviation equal to 43.7ft.
The chi-square goodness of fit test can be used when we:
How do you classify statistical findings in order of power: nominal, ordinal, interval, and ratio? Give example by making up values.
Using the sample information given in the above exercise, the p value for testing Ho versus Ha can be calculated to be 0.0057
A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces.
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