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SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points and are approximately normally distributed. A person who scores (a perfect) 800 on the SAT I has approximately what percentile rank within the population?
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
Jane chooses every 20th person in the campus phone book to call for her interview study. Justin identifies important subgroups in the campus population
Do you believe that the government should or should not be allowed to prohibit teachers from expressing their religious beliefs in public schools classrooms?
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be
How close is the calculated value to your experimental value?
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
Define, describe and provide an example of the Komologrov-Smirnov distribution. Use MS-Excel (if possible) to solve this problem, also Show all your work in obtaining the answer.
Use a .05 significance level to test claims that quarters manufactured with the new equipment have weights with a standard deviation less than .061
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog. a) What is the sampling distribution of the proportion p^ in the sample who jog?
In the biology class the mean score was 79 with standard deviation 5.
What purpose does a multiple regression analysis serve? Give an example of how it might be used in marketing research.
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