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An independent sample t-test for gender (IV) and pretest scores (DV)
Were there significant gender differences? How do you know? Interpret the results statistically and in words.
Data Set Homework 2 (*note 1 = males, 2 = females)
Gender Pretest Posttest
1.00 50.00 80.00
1.00 50.00 70.00
1.00 80.00 70.00
1.00 80.00 50.00
1.00 70.00 50.00
1.00 60.00 60.00
1.00 60.00 80.00
1.00 90.00 80.00
1.00 90.00 90.00
1.00 80.00 90.00
1.00 70.00 70.00
1.00 70.00 80.00
2.00 50.00 70.00
2.00 40.00 50.00
2.00 40.00 80.00
2.00 70.00 80.00
2.00 50.00 80.00
2.00 50.00 90.00
2.00 60.00 90.00
2.00 70.00 90.00
2.00 30.00 70.00
2.00 50.00 60.00
2.00 60.00 80.00
2.00 60.00 70.00
a. suppose x has a poisson distribution with parameter ?11.44. find the following.i. the mean of x.ii. the standard
Under proposed plan, how long, on average, will patient stay in ER? On average, how long will Potential Admit stay in ER?
In a random sample of 16 mountain climbers who are going to attempt Mt. McKinley, what is the probability of each of the following? No more than 12 reach the summit.
If independent samples of size n1 = 125 and n2 =100 are drawn with replacement, what is the probability that the difference between x¯1 and x¯2 will be greater than 1.84 but less than 2.627
1 an 8-card hand is dealt from a standard deck of 52 playing cards. what is the probability thata you are dealt at most
suppose that the amounts that students at a college spend on textbooks this semester have a normal curve with mean ? mu
you are picking a bouquet of 20 flowers for your mother at random from a garden with 25 coneflowers 35 daisies and 42
According to a recent survey, the probability that a passengerfiles a complaint with the Department of Transportation about aparticular U.S. airline is .000014. Suppose 100,000 passengers whoflew with this particular airline are randomly contacted..
Is the gender distribution for theater goers significantly different from the distribution for the general college? Test at the .05 level of significance.
Suppose that 100 people are given lipid lowering drugs and that the drug appears to be effective in about 20 of them. Effective is defined as lowering their cholesterol values by 10 points in one month.
Is this a proper probability density function? How do you know? Find the mean, variance, and standard deviation of x, showing your work.
Construct a 95% confidence interval for the population mean.
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