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In random samples of 25 from each of two normal populations, we found the following statistics:
X/mean=524 S1=129X/mean=469 S2=141
a. Estimate the difference between the two populations means with 95% confidence.b. Repeat part a, increasing the standard deviations to S1=255 and S2=260.c. Describe what happens when the sample standard deviations get larger.d. Repeat part a with sample of size 100.e. Discuss the effects of increasing the sample size.
Provide at least 1 example of how a real company has used each of the following multivariate techniques: factor analysis, multi-dimensional scaling, and cluster analysis.
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Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.
For a random sample of 50 batteries, what is the probability that the sample mean will be less than 27.5 hours?
Determine the relationship between pretest scores and final exam scores after controlling for cumulative GPA. Compute SPSS test would you run?
One sample has a variance of s2=6 and a second sample has a variance of s2=8. If the two samples are the same size (n1=n2), then what is the pooled variance for the two samples?
A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. Find the probability of a type II error, β, given that the true value of the population proportion is 0.72. The sample size is 50 and the significan..
Find a 90% confidence interval for the mean decibel level µ for this type of transit vehicle.
A recent study of the Greater Los Angeles Taxi Driver Association demonstrated that the average or media tariff that they charge from Hermosa Beach to the International Airport of Los Angeles is $18.00
Determine equation in point-intercept form for line that goes through points (8,-1) and (4,3).
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