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Question 1. One sample has n = 5 scores and the second has n = 10 scores. If the pooled variance for the two samples is 30, what is the value of the estimated standard error for the sample mean difference?
Question 2. Two samples, each with n = 9 scores, produce an independent-measures t statistic of t = 2.00. If the effect size is measures using r^2, what is the value of r^2?
suppose 10 players are selected at random out of eighteen possible people where 15 are women and 3 are men with each
The following data are from two separate samples. Does it appear that these two samples came from the same population or from two different populations?
A large internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days.
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
Suppose that = $7600, is there adequate evidence to conclude that mean annual wage of people from this county is signicantly dierent than state mean?
inter arrival time of busses of route 49u of milwaukee bus system follows an exponential distribution. the probability
A researcher believes that if she uses a different text the students will score differently on the standardized test but she doesn't know what the difference is. The test had a mean of 110 and a σ of 12.
If you play California Super Lotto, you pick five numbers from 1 to 47 and one mega number from 1 to 27. If you buy one ticket ($1.00), what is the probability of winning the Jackpot
to evaluate a particular metlar scale an item whose weight is known to be 16.01 ounces is weighted five times by the
If three of these computers are placed in parallel aboard the proposed space station, what is the system reliability for the first 6 months of operation?
Calculate the correlation coefficient, coefficient of determination. Check whether there is a relation between correlation coefficient and coefficient of determination.
assume that a simple random sample has been selected from a normally distributed population and test the given claim.
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