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A researcher wanted to compare food ratings at restaurants located in the city with those located in the suburbs. She randomly selected 50 urban and 50 suburban restaurants, collected data on food ratings at each of those restaurants, and conducted a 2-sample t-test. A p-value of .141 resulted. State the null and alternate hypotheses, state whether the null hypothesis should be rejected or not rejected and your reason for that conclusion, state the meaning of that conclusion specifically in terms of the problem being studied.
Show that {Xt} is a white noise sequence.This provides an example of a dependent white noise sequence. Prove that Xt and Xt+1 are not dependent.
A survey indicates that male employees were more likely than females to relocate without being promoted. What information would you want to know before you accepted the results of this survey?
1.) A doctor claims that the standard deviation of systolic blood pressure is 12 mmHg. A random sample of 24 patients found a standard deviation of 14mmHg. Assume the variable is normally distributed. At a=0.01, what are the critical chi square..
We assume that we have selected two independent random samples from populations having proportions p 1 and p 2 and that p-hat 1 = 800/1000 and p-hat 2 = 950/1000
the life of a semiconductor laser at a constant power is normally distributed with a mean of 7000 hours and a standard
List all outcomes corresponding to the five smallest possible values of Y, and state which Y value is associated with each one.
Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
Among its various routes, a transit agency operates a trolley line. The line has a total of 18 trolley cars. Some of these cars are unavailable because they are being maintained or repaired.
Use these data and multiple regression to develop a model that attempts to predict all commodities by the other four variables.
1. you will throw a fair coin 6 times and will win on heads and lose on tails. denoting a win as a 1 and a loss as a 0
question if cassie goes to the skate park hanna and amy will go. if hanna or amy go the skate park marc will go. if
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