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A researcher wants to know if there was a difference between urban and rural jurisdictions in the hiring of female police officers last year. In urban jurisdictions (N = 77), the mean number of females hired was 9.65 (s = 4.17). Police departments in nonurban areas (N = 84) hired an average of 6.80 females (s = 4.16). Using an alpha of .05, test the null hypothesis that there is no difference between the means.
What is the null hypothesis? What is the research hypothesis? What are the degrees of freedom? What is the critical value? Do you reject or fail to reject the null hypothesis? What does this mean?
The Warren County Telephone Company claims in its annual report that "the typical customer spends $70 per month on local and long-distance service.
Plot CEO salaries against the net profit of their respective companies, do you expect to find a linear correlation between the two?
Use the commutative and associative properties of multiplication and exponential notation to rewrite the product.
Listed below are weights in grams from a sample of these bats. Construct a 95% confidence interval estimate of their mean weight.
For the events A and B, if (A∩B)' =S (where S, of course, is the sample space), then the events CANNOT be mutually exclusive.??b. In a confidence interval for the difference between n matched pairs of observations, the t-distribution to use is with 2..
What is the difference between the critical-value method and the p-value method of hypothesis testing? Include in your post how the question's topic pertains to your health discipline.
The percentages of cones sales for chocolate, strawberry, and vanilla, are 75%, 60%, and 40%, respectively. For a randomly selected sale, define the following events:
The grade point averages for 10 randomly selected high school students are listed below. Assume the grade point averages are normally distributed.
The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks?
what statement should be made about the null and alternative hypothesis based on sample data and significance level?
a. What is the probability of a type I error? b. Give the formula for the test statistic.
using alpha gt 0.05 a confidence interval for a population proportion is determined to be 0.15 to 0.35. if the
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