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Based on data from the college board assume SAT scores are normally distributed with a mean of 1518 points and a standard deviation of 325 points? If a sample of 100 students is taken taken what is the mean and standard deviation of the distribution of sample means?
suppose you have data from an experiment with 3 levels of the independent variable. explain why an anova followed by
The manufacture of the X-15 steel belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles.
the moment generating function for a random variable x is given by mxt 14 3411-t tgt1. determine formulas for the
listed are the ages in years of randomly selected race car drivers use a 0.05 significance level to test the claim that
lionel wants to play the crane machine arcade game the one with the mechanical claw to win a stuffed animal. he is good
24% of the students in the sample received and A. At the 1% signifiance level, the test hypothesis that more then 20% of the students received and A.
Using this information, calculate Blpha risk (probability of Type II error) if the true population mean really is 81.
an experiment was performed to investigate the keyboard feel on a computer crisp or mushy and the size of the keys
a fair six-sided die with numbers 123456 is rolled independently 500 times. approximate the probability that the sum is
construct a confidence interval of the population proportion at the given level of confidence. x105 n150 95
write the null and alturnative hypothesis identify which is the claim.the results of a recent study show that the
Suppose that X1, X2, . . .is a sequence of random variables with E(Xt2) 8 and E(Xt)=µ. a. If X1, X2, . . .is iid with E(Xi2) 8 and EXi=µ, where µis known, whatis the minimum mean squared error predictor of Xn+1in terms of X1, . . . , Xn?
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