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Brendan and Carlos began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Brendan took a test in Social Studies and earned a 80.9, and Carlos took a test in Science and earned a 63.4. Use the fact that all the students' test grades in the Social Studies class had a mean of 75.3 and a standard deviation of 10.1, and all the students' test grades in Science had a mean of 60.8 and a standard deviation of 9.9 to answer the following questions.
a) Calculate the z-score for Brendan's test grade.
z= _______________
b) Calculate the z-score for Carlos's test grade.
z= ___________
c) Which person did relatively better?
-Brendan
-Carlos
-They did equally well.
Does the above experiment suggest that the proportion of boys who grow out of asthma in their teenage years is 0.10 or more than that of girls?
The class mean was 105 and the standard deviation 15. On the third exam, the mean was 45 and the standard deviation 3. Ableson got 51. Which test should be dropped?
Internet and Nobel Laureates Find the best predicted Nobel Laureate rate for Japan, which has 79.1 Internet users per 100 people. How does it compare
the distribution of the sat scores in math for an incoming class of business students has mean of 580 and standard
an urn contains 9 colored balls 4 orange and 5 blue. two balls are selected at random without replacement and you are
Body mass is a simple index of weight for height that is commonly used to classify overweight and obesity in adults.
1. assume your marginal tax rate combined federal state and local is 34.1 percent. how many extra dollars must you earn
For each of the studies described, explain whether the study was an observational study or a randomized experiment.
The Office of Federal Housing Enterprise Oversight (www.ofheo.gov) collects data on various aspects of housing costs around the United States.
Seniors as to how much they spent on textbooks in that term. The bookstore believes that the two groups spend the same amount. What is the test value?
Echinacea is an herb that may help to prevent colds and flu. Explain how researchers could conduct a double-blind, double-dummy experiment to compare.
Assume the alpha level is 0.05. What is our hypothesis? Compute the test statistic using the formula. What is the p-value?
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