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Change the number from 36 to 14 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Given the real estate market in a western state, the probability of selling one or more homes on any given day is:
A recent Harvard Business Review article titled "When to sleep on it" discusses the usefulness of deliberating a business decision. Is this study observational or experimental? Please explain
Suppose the correlation between height and weight for adults is +0.80. What proportion (or percent) of the variability in weight can be explained by the relationship with height?
Assuming weight gain is normal, find the 95% confidence interval estimate for the mean of the differences μd where d= ration A - ration B.
If the correlation between X and Y is r = .30 and SSY = 100, how much of the Y variability is predicted by the regression equation? SSregression = _____ points.
Compute the Kappa statistic and its standard error reading reproducibility of the diagnosis of dyspnea in this clinic.
A multiple regression equation with two predictor variables produces R2 = .10 and SSY = 100. What portion of the variability for the Y scores is predicted by the equation? SSregression = _____ point
How many participants need to be enrolled in each group to have a 90% chance of detecting a significant difference a two-sided test with α=0.05 if compliance is perfect?
The personnel manager for a large corporation feels that there may be a relationship between absenteeism. Determine the regression equation using number of days absent as the dependent variable.
A study of the net sales of a sample of small corporations revealed that the mean net sales is $2.1 million, the median $2.4 million, the modal sales $2.6 million and the standard deviation of the d
A random sample of 81 students shows that 39 have jobs. Do the data indicate that more than 35% of the students have jobs?
An opinion poll calls 2405 randomly chosen residential telephone numbers, then asks to speak with an adult member of the household. The interviewer asks, "How many movies have you watched in a movie
Using random numbers of 0.1562, 0.9821, 0.3409, 0.5594, and 0.7758, compute the time required for each of five simulated maintenance checks of the airplaine's landing gear.
A vending machine dispenses coffee into a twenty ounce cup.The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.02 ounce.You can allow the cup to overfi
7 studied history and neither math nor pyschology, 10 studied all three and 8 did not take any of the three subjects What is the probability that the student takes math only?
Mountain Laurel Vineyards produces three kinds of wine -Mountain Blanc, Mountain Red, and Mountain Blush. The company has 17 tons of grapes available to produce wine this season. A cask of Blanc req
Suppose the following statistics were calculated from data gathered from a randomized block experiment with k = 4 and b = 10: Can we conclude from these statistics that the block means differ? (Use &a
The Sheraton, and 8% of the rooms at the Holiday Inn. What is the probability that a person with a room having faulty plumbing was assigned accommodations at the Holiday Inn.
what does the central limit theorem tell us about the sampling distribution of sample means for samples of this size from this population?
every single class in the masters degree program has a 5% failure rate per month. Say also that when a student fails once, he or she drops from the program. There are twelve months. Given a cohort o
Set up a scatter diagram and calculate the associated correlation coefficient. Discuss how strong you think the relationship is between the amount of money spent on television advertising.
Construct a 95% confidence interval for the weekly average expenditure on fast food for adults 24 years of age and under. Assume fast food weekly expenditures are normally distributed.
Explain the theoretical basis for this view of inferential statistics. Logic is a systematic method for getting the wrong conclusion with confidence.
(a) If 24% of all seams need reworking, what is the probability that a rivet is defective?(b) How small should the probability of a defective rivet be to ensure that only 5% of all seams need rework