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If the test statistic for a small sample difference of means test is t* = 2.045, we could reject the Null Hypothesis at alpha = .05 for a two-tailed test with degrees of freedom equal to 16
a manufacturer of sports drinks has randomly sampled 198 men and 202 women. each sampled participant was asked to taste
the life in hours of a 75-watt light bulb is known to be normally distributed with s25 hours. a random sample of 20
You are told that twenty-five percent of the player names in the hat are quarterbacks and that forty percent of the players in the hat have Porsches in their garage at home. What is the likelihood that you will get to go to lunch with a quarterbac..
A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%? A previous study indicates that ..
there is a row of n chairs each containing a student. let an be the number of ways to reassign seats so that each
question the heights of all people who are members of a university sports club are measured. there are 1000 people in
you find a die on the street. it feels a little heavier than normal but you dont really think anything of it until you
a researcher conducts an independent-measures study examining how the brain chemical serotonin is related to
The population standard deviation can be assumed known as .24. What is the 95% confidence interval estimate of the mean undergraduate GPA for students admitted to the top graduate business schools.
suppose that a player is a 75 shooter in the first throw and a 80 shooter in the second if the first one is scored but
Assume 41% of all American adults have some college education. American adult is randomly selected. Determine the probability that adult owns stock or has some college education?
a student believes that no more than 25 i.e. 25 of the students who finish a statistics course get an a. a random
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