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"Testing the Difference Between Two Means."
• What two assumptions must be met when you are using the z test to test differences between two means? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2?
• Retired workers and disabled workers both receive Social Security benefits. What information would we need to test the claim that the difference in monthly benefits between the two groups is greater than $30 at the 0.05 level of significance? Write out the hypotheses and explain the testing procedure.
Utilizing jacobian method finding the probability density function. Utilizing either the CDF method or Jacobian method illustrate the probability density function of Y is given.
Children toilet train (training age normally distributed) at an average of 26 months with a standard deviation of 2 months. How lilely is child to be trained after 30 months?
What is the 95% confidence interval for the mean number of microwaves sold at a retail store in the chain last week?
Identify at least 2 variables for which you would utilize a repeated-measures ANOVA in your analysis and describe the variables and scale of measurement. Identify whether each factor is fixed or repeating.
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
Standard deviation was 16. Determine the 99% confidence interval of true mean. Suppose the variable is normally distributed.
Suppose that the average annual salary for the worker in United States is $39,000.00 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000.00.
Evaluate percentage of households in town with one or more cars; attach standard error to be evaluate. If this is no possible, describe why not.
How large a sample of one-bedroom apartments would be needed to estimate the mean within $20 with 90% confidence?
The width of a confidence interval will be:
Test the teachers hypothesis that there is a significant difference between the pre and post tests.
This sample for the proportion of the population that would favor a recount. What is the Point Estimate for the proportion of the population that would favor a recount?
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