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Explain whether the width of a confidence interval would increase, decrease, or remain the same as a result of each of the following changes:
a. Increase the sample size from 1000 to 2000.
b. Decrease the sample size from 1000 to 500.
c. Increase the population size from 10 million to 20 million.
Hypothesis test for one population mean - What is the alternative hypothesis and What is the null hypothesis?
Design a randomized groups experiment to test the hypothesis that children who watch an hour-long violent television show subsequently play in a more aggressive fashion than children who watch a nonviolent TV show or who watch no show whatsoever.
the number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a
What type of damage could occur if you grabbed a door frame with your left arm stepped with your right leg the leg shoots out from under you and you bounce down hitting the edge.
conduct a test of hypothesis to determine whether the mean payroll of the teams was different from 80 million. .05 is
The Republican party is interested in studying the number of Republicans that might vote in a particular Congressional district. Assume that the number of voters is binomially distributed by party affiliation (either Republican or not Republican).
Tourism is one consideration for CoffeeTime's future. A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small cafe during their visit. Laura claims that 10% of tourists will include a visit to a cafe.
Under the assumption that the food expert is correct, what would be the probability of a "taste-off" in which 110 or more of the subjects preferred soft drink A?
What are the null and alternative hypothesis for the following statement and why?
for a hypothesis comparing two population means what is the critical value for a one-tailed hypothesis test using a 5
consider the following. enter your answers to four decimal places.a find the level of confidence assigned to an
Let s classify the eruptions as long or short, depending upon whether or not they last at least 3 minutes. Describe what you see in the comparative boxplots.
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