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Let us show idea of sampling distribution in case of very small sample from very small population. Population is the scores of 10 students on exam:
Student 0 1 2 3 4 5 6 7 8 9Score 82 62 80 58 72 73 65 66 74 62
Parameter of interest is mean score in this population. Sample is an SRS of size n = 4 drawn from population.
a. Determine the mean of 10 scores in the population.
Suppose we have a set of body temperatures with a mean of 98.6 degrees, and a sample standard deviation of 0.5 degrees. Assuming a normal distribution of body temperatures in the larger population, between what two values should 95% of all tempera..
For what value of t will the null hypothesis not be rejected?
Below are revenue and profit (both in $ billions) for nine large entertainment companies.
Construct a 95 percent confidence interval for the true mean.
When we carry out a chi-square test of independence, the expected frequencies are based upon the Null hypothesis - true or false.
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
What happens to the confidence interval and the power of the test at a particular point of interest. As one increases the sample size of a test, all else remaining the same.
The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days).
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
A supervisor has noticed that sales for all departments world wide has been averaging $12,000 a month for a number of years. For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Manage..
Chocolate bars produced by a certain machine are labeled with 16.0 oz. The distribution of the actual weights of these chocolate bars is Normal with a mean of 16.1 oz and a standard deviation of 0.1 oz. A chocolate bar is considered underweight if..
A coin is flipped e times and heads (h) or tails (t) are recorded:
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