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A company that sells an online course aimed at helping high-school students improve their SAT scores has claimed that SAT scores will improve by more than 90 points on average if students successfully complete the course. To test this, a national school counseling organization plans to select a random sample of n = 100 students who have previously taken the SAT test. These students will take the company's course and then retake the SAT test. Assuming that the population standard deviation for improvement in test scores is thought to be 30 points and the level of significance for the hypothesis test is 0.05, find the critical value in terms of improvement in SAT points, which would be needed prior to finding a beta.
assume you are building a system aircraft etc. for a customer but using the best technology available. you cannot
q1 a researcher claims that the standard deviation of the ages of cats is smaller than that for dogs. a random
A college's data about incoming freshmen indicates that the mean of their high school GPA was 3.4, with a standard deviation of 0.35. Let X=the GPA of an incoming freshman. The students are randomly assigned to writing groups of size 49.
What is the marginal revenue equation? Find the output to the nearest thousand cameras that will produce the maximum revenue. What is the maximum revenue?
Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.
a social researcher believes the color red causes mens attraction to women to increase as well as womens attraction to
Compose a 350 to 700-word summary report of your findings to the researcher and owner of the restaurant in which you Identify evidence, if any, of the researcher's claim. Perform a one- or two-tail test on the data provided,
Determine whether the following equations have a solution or not? Justify your answer. What type of solution do you get for quadratic equations where D
10. 3.52 8.87 3.99 3.61 2.33 3.21 0.25 4.94use the sample data to construct a 95 confidence interval estimate of the
a spinner is divided into 4 equal spaces. a player bets 2.00 on a given space. if the spinner lands on that space he is
We can compare two sample means to determine if the samples were obtained from normal populations with the same mean using the "t" distribution.
Illustrate the maximum number of reservations that it could accept for a flight with a capacity of 160, if it needs the probability of accommodating all reservation holders to be at least 95%.
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