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Find the critical value, t0, to test the claim that the mean1>mean 2. Two samples are randomly selected and come from populations that are normal. The sample statistics are given below. Assume that standard deviation 2/1 is not equal standard deviation 2/2. Use alpha
=0.01.
N1=18 n2=13
x1=790 X2=775
s1=40 s2=25.
A. 2.179
B. 2.681
C. 3.055
d. 1.699
Calculate a 90% confidence interval for the percentage of homes in the US that had guns at the time of survey.
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The probability of obtaining a random sample mean, which is lower than the population mean, is:
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What is the probability that separates the bottom 25 percent from the rest of the distribution.
Estimate the probability the store will gross over $850 a) At least 3 out of 5 business days.
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