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Even more on determining hypotheses
In each of the following situations, state an appropriate null hypothesis H0 and alternative hypothesis Ha. Be sure to identify the parameters that you use to state the hypotheses. (We have not yet learned how to test these hypotheses.)
(a) A sociologist asks a large sample of high school students which academic subject they like best. She suspects that a higher percent of males than of females will name marketing as their favorite subject.
(b) An education researcher randomly divides sixth-grade students into two groups for physical education class. He teaches both groups basketball skills, using the same methods of instruction in both classes. He encourages Group A with compliments and other positive behavior but acts cool and neutral toward Group B. He hopes to show that positive teacher attitudes result in a higher mean score on a test of basketball skills than do neutral attitudes.
(c) An education researcher believes that among college students there is a negative correlation between credit card debt and self-esteem. To test this, she gathers credit card debt information and self-esteem data from a sample of students at your college.
A sample of 144 cans of coffee showed an average weight of 16 ounces. The standard deviation of the population is known to be 1.4 ounces.
The following paper seeks to provide basic knowledge in some specific areas of statistical data analysis. While there are no hard and fast distinctions for analyzing statistical data, ensuring that you have a methodical approach is vital to an acc..
a machine has 9 identical components that function independently. the probability that a component will fail is 0.2.
A) Predict the final score if the person obtains a third exam score of 68. B) Calculate the standard error of the estimate.
there are 1000 students in the senior class at a certain high school. the high school offers two advanced placement
what is an example of a variable for which we would use a x2
If the city manager knows the average salary nationally is $38,300, which test of significance should be used? Why?
CCI is unable to adjust the mean of the filling process. However, it is able to adjust the standard deviation of the filling process. What would the standard deviation need to be so that no more than 2% of all filled bags weigh more than 52 kilogra..
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
study the following minitab output from a regression analysis to predict y from x.a. what is the equation of the
Students given exam with 300 multiple questions, distribution was normal and mean 195 with a standard deviation of 30. What were the scores of the students who are within one standard deviation of the mean?
The table below lists deaths in Georgia in 2004, the estimated population of Georgia in 1994 and the U.S. population according to the 2000 census. Calculations should be done by hand, but feel free to use software to check your work.
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