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For a normal random variable with mean 19,500 and standard deviation 400, find a point of the distribution such that the probability that the random variable will exceed this value is 0.02.
Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level
waiters at finegolds restaurant and lounge earn most of their income from tips. each waiter is required to tip-out a
Is there sufficient evidence to support the claim that the diet is effective? Explain. What is the mean weight loss? Is it large enough to make the diet practical for someone wanting to lose weight?
here is data on the age in months that 20 children said their first words of
Forecast this time series for the first 4 months of the next year using the most appropriate method. Defend your choice of forecasting method.
Thus, for instance, in 36 of the couples the wife earned more and the husband earned less than $50,000. If one of the couples is randomly chosen, what is the probability that the husband earns less than $50,000;
An engineer is studying bearing failures for two different materials in aircraft gas turbine engines. The following data are failure times (in millions of cycles) for samples of the two material types.
What are the implications of forecast errors?
a random sample of medical files is used to estimate the proportion p of all people who have blood type b.a if you have
Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-sharing mini-frame computer facility. What are the values of alpha and beta?
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data.
What are the null and alternative hypotheses for this test? Use ANOVA and the 0.05 level of significance in testing the null hypothesis identified in part (a).
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