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Define Confidence Interval Estimation
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using results, explain the effect of an outlier or extreme value on the confidence interval.
Of the adults in Jefferson County, 10 percent have had CPR training. For a randomly selected group of students from this county, how large will the group have to be in order for the probability that have as a minimum one group member has had CPR t..
By using the 0.10 level of significance, is there evidence that the population mean is above the $300?
Which of the following would produce a new confidence interval with smaller width based on these same data and produce a new confidence interval
Based on chi-square table, what is the most correct statement which can be made about the p-value for the test?
You know that all sociology majors study 2.5 hours per day with a standard deviation of 1.
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
One characteristic of billiard balls is their elasticity - the bounce they get when striking one another. A manufacturer of billiard balls is testing three additives to the basic plastic.
The summation sign is usually represented by:
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
We desire to test at 0.05 level of significance whether modification increases the life of battery. What is our decision rule? Reject null hypothesis if calculated t is less than 1.96.
What sample size and acceptable level would result in a probability of .05 that a good batch will be rejected and a probability of .10 that a bad batch will be accepted?
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
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