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A) Compute a 95% confidence interval for the population mean, based on the sample 32, 38, 31, 34, 35, 32, and 36.
B) Change the last number in that set from 36 to 14 and recalculate the confidence interval.
C) Using the results, describe the effect of an outlier or extreme value on the confidence interval.
You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
Can the binomial distribution be used to model the number of rare events that occur over a given time period?
Based on these data, determine the 95 percent confidence interval estimate for true population mean?
What is the probability of randomly selecting a male from this group?
Examine the two standard deviations. What do these indicate about the range of benefits enjoyed by the two groups?
Which distribution should be used to create 80% confidence interval?
Two events are mutually exclusive: If their intersection is 1, If they have no sample points in common.
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
Compute test statistic for sample data that you would use to test whether sample mean varies from population mean of 10 pounds at a 5 percent level of significance in two-tailed test.
You are estimating the install hours for an electronics upgrade based on the number of components affected. The upgrade for which you are estimating affects 25 components. Given the following equation, select the correct response from each pair.
Do these data suggest a statistically significance difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance and computed value of 2.37.
Illustrate what amount of sales would be required to be a super savings club member. Elucidate amount of sales would be required to be a gold club status.
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