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For the 20 test scores shown, find the percentile rank for a score of 86.
75 63 92 74 86 50 77 82 98 65 71 89 75 66 87 59 70 83 91 73
75th percentile 30th percentile 80th percentile 70th percentile???
a pollster took a random sample of 100 students from a large university and computed a 95 confidence interval to
a game has a spinner that is equally likely to land on any 1 of 4 colors red blue yellow or green. determine the
A biologist had mice and rats run through a maze and recorded the number that finished the maze successfully and the number that did not. This table lists the results of the study.
in a study in which k 3 n 21 mean of x1 45.3 mean of x2 16.9 and mean of x3 8.2 you compute the following sums of
Calculate and interpret the appropriate statistical test to determine the relationship between the following two variables. Use the five-step model of hypothesis testing to draw conclusions at the .05 level of significance
a popular flashlight that uses two d-size batteries was selected and several of the same models were purchased to test
Linear Optimization.
Suppose you compute a simple linear regression on a single sample. Then you find additional data and recompute the regression on the larger sample and that the result is an increase in the regression slope.
the average number of acres burned by forest and range fires in a large new mexico county is 4300 acres per year with a
Compute the probability of selecting a credit card customer at random and finding the customer charged between $70 and $83 last month.
1.a scientist examined the effect of temperature and catalyst on the yield of a reaction. he ran the experiment at both
about 30 of adults say that reading is a favorite leisure activity. let success be the outcome that reading is a
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