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Finding probability for the given values of the uniform density curve
What is the probability that the random variable has a value greater than 4?
a.0.625
b.0.450
c.0.375
d.0.500
Describe the sampling distribution of the sample mean.
Construct the 90% and 95% interval estimates for the population mean weekly sales.
These individuals are then examined and categorized as to whether they have a heart disorder. The observed frequencies are as follows:
At 5 % level of significance, does this sample prove violation of the guideline that average patient muts pay no more than $250 out-of-pocket? Is this a close decision?
To find out the estimate of between and within treatments.Samples were selected from 3 populations. The data obtained follow.
Find a 99% confidence interval for the difference in the mean number of calls between night and day.
Final scores averaged 66 for the treatment group; the SD was 21. For the control group, the figures were 59 and 20. What do you conclude?
He randomly samples 45 oil wells throughout the United States and determines the mean output to be 10.7 barrels per day with a standard deviation of 1.3 barrels. Test the researcher's claim at the .025 level of significance.
What sample size would be needed to estimate the true proportion of students at your college
A case-control study of relationship between liver cirrhosis among both non alcoholics and alcoholics. Describe whether smoking is confounder.
Using one mean t test to determine whether or not to support the claim - hypothesis test that WORKS THE SAME as the z-test
Test whether there is significant difference in the test anxiety level of the three groups using nonparametric test.
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