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For the following population of N=10 scores 14,6,8,3,13,8,9,12,1,6
a) sketch a histogram showing the population distribution
b) locate value of the population mean in your sketch and make an estimate of the standard deviation.
c) compute sum of square (SS), variance, and standard deviation for the sample.
Utilizing the .05 level, do the results support the psychologists' theory. Elucidate your answer to somebody whom has never had a course in statistics.
Use the normal-theory method to test for significant differences in 12-month mortality between the two groups.
Find out the probability that the return for common stocks will be more than 0%.
If we select one box of cereal at random from this population, what is the probability that it will weigh less than 915 grams?
He measures the heights of 25 men from this century and finds the mean and standard deviation for his sample.
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
A simple random sample is to be drawn from a population of 1200. To have 90% confidence that the sampling error in estimating p is no more than 0.03
Do these data provide sufficient evidence to reject the claim made by Creative Good? Two sample F-test for the ratio of population variances
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.
Compute the mean, standard deviation, median, and standard error for each group.
Find the standard deviation and variance from the (population) data below. Describe your results.
Suppose you were to cut up the directory and pull out one listing at random to contact.
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