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By the Central Limit Theorem, the sampling distribution of (x1 - x2) is
a. approximately normal for small samples
b. approximately skewed for large samples
c. approximately normal for large samples
d. approximately a t-distrubution for large samples
a sample of nine public universities and nine private universities was taken. the total cost for the year including
in conducting a survey what do you think is even more important than the size of the sample?
question 1 in a simple random sample from a population of several hundred thats approximately normally end of exam
This problem involves calculating and interpreting the 95% confidence interval for a proportion. While you can use SPSS to determine proportions, you need to calculate the confidence interval by hand.
what is the probability that he will prefer A, as a function of a and b? 3. Under what conditions on a and b will this probability exceed 0.8?
What is the probability that the student is both a sophomore and a history major?
Assume a very large normally distributed population of scores on a test with mean 77 and standard deviation 7.
Evaluate and discuss the following hypothesis based on what you have learned about hypothesis statements. Should they be written differently, or are the sufficient the way they are stated?
consider two random variables with standard deviations equal to 1.5 and 2.1. the standard deviation of the average of
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random.
nearly every aspect of our lives is impact by waiting on lines queues including grocery stores waiting at red lights
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