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In a homicide case 4 different witnesses picked the same man from a line up. the line up contained 5 men. if the identifications were made by ramdom guesses, find the probability thatall witnesses would pick the same person.
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
The cheetahs' coach believes that the Rockets' times are normally distributed as well. Construct a 95% confidence interval the Coach to compare the two teams' sprint units.
Obtain a test statistic and p-value. Interpret the results. (c) Is normality assured? (d) Is the difference large enough to be important?
The proportion of adults in the sample, as her estimate of p, the proportion of adults in the pond population. Find using the normal approximation with the continuity correction.
Jose scores 842 on the SAT. Assuming that both tests measure the same thing, what score on the ACT is equivalent to Jose's SAT score?
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
Assume that both samples are independant simple random samples from populations having normal distributions.
Let X1,... x30 be independent Poisson random variables having mean 1. (a) Use Chebyshev's inequality to find a lower bound on the probability.
Assuming that the heights are recorded to the nearest half-centimeter, how many of these students would you expect to have heights.
You want to prove that a population mean is not 7. Data is ratio and a large sample size will be used (n = 225). When the sample is done the sample mean is computed to be 7.2 and the sample standard deviation is 1.5.
Sample without replacement when testing batches of products. When sampling without replacement, should you use the multiplication rule for independent or dependent events.
We measure the self esteem scores of a sample of statistics students, reasoning that this course may lower their self esteem relative to that of the typical college student (µ=55 and σ x =11.35) We obtain these scores:
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