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Consider the test of the claims that the two samples described below come from two populations whose means are equal vs. the alternative that the population means are different. Assume that the samples are independent simple random samples and that both populations are approximately normal with equal variances. Use a significance level of α=0.05
You are given some information about a sample of data. It is known that the sample variance for this set of data is 10. You are also told that the sum of the squared deviations from the sample mean is 510 (see below). What is the size of this samp..
Find the critical value at the .01 level. Decide if the null hypothesis is to be rejected or not. Make a summary table for your ANOVA test.
one environmental group did a study of recycling habits in a california community. it found that 71 of the aluminum
Since the introduction in the UK of the Equal Pay Act in 1970, there has been considerable interest in monitoring the difference between women and men's pay. Official statistics, via the Office of National Statistics (ONS), play an important role ..
Using a nondirectional hypothesis test and a level of significance of your choice, what conclusion would be reached? For the significance level used in part (a), construct the appropriate confidence interval and verify the conclusion reached in par..
the four year graduation rate at the university college of engineering is 60. class of 2015 unm-coe has 250 students.
which of the following would cause a change in a feasible region?removing a redundant constraintincreasing an objective
The data is posted on Blackboard. Download the data lfs4.dta on your personal computer. This data is from the Labour Force Survey 2003. In STATA, add enough memory to open the data set (Set memory 300) and open the data file. Refer to the Record L..
there are 4000 mangoes in a shipment. it is found that it has a mean weight of 15 ounces with a standard deviation of
Explain why the chi-square goodness-of-fit test is not an appropriate way to find out.- What might you do instead of weighing the nuts in order to use a test?
The correlation between IQ and the verbal SAT score among the seniors at GWB High School is .90; it is significant. The mean IQ is 100 with a standard deviation of 10.
Draw a picture of the sampling distribution of the sample mean GPA for a random sample of 100 students.- Find the probability that the sample mean will be 3.15 or greater.
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