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The SAT scores (out of a maximum possible score of 1600) for a random sample of 10 students who took this test recently are:
1355 765 890 1089 986 1128 1157 1065 1224 567
Test the hypothesis that the median SAT score is 1000 against the alternative that it is greater using α = 0.05. Use both the sign test and the Wilcoxon signed rank test. Explain if the conclusions are different.
question 1 8 marks the australian divorce rate has been steadily increasing over the years until late 1990s. however
Let et~ WN(0,2). State for each of the following model whether it is stationary and whether it is invertible. Explain your answer. a) Zt= 1+ 0.5Zt-1 + et, t=1,2.3.... b) Zt= et - 1.5et-1 + 0.5et-2, t=1,2,3,
The sample mean of the annual salaries of a group of 100 accountants who work at a large accounting firm is $130,000 with a sample standard deviation of $20,000.If a member of this group is randomly chosen, what can we say about the probability tha..
Fawns Fawns among1 or 5 months old in Mesa Verde National Park have a body weight that is approximately normally distributed with mean
What are the predictor and response variables? Make a scatterplot of the data and find r to see if a linear pattern seems to exist. If it appears to have a linear relationship, find the regression line. Dont forget to state what r is, and interpret..
Prepare a frequency distribution of ungrouped data including cumulative frequency (tally) for the table of approvedCalculate the mean, mode and median of the table of approved
Are the following workers more likely to experience short-term or long-term unemployment? Explain.
assume that there are 400 undergraduates in the college of business. 35 students are taking a data mining class and 300
a brewerys filling machine is adjusted to fill bottles with a mean of 31.2 oz. of ale and a variance of 0.003.
You were hired to do the development work for the local high school. The school has asked you to create a program to store quiz grades for the students of a class.
While 60 of the children's books are nonfiction. If a book is selected at random, find the probability of selecting the following not a children's nonfiction.
a glass factory produces windshields for large commercial trucks. assume that the process that produces the windshields
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