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1. We ask if the attitudes toward fuel cost of 100 owners are hybrid electric cars (X=76) are different from those on a national survey of owners of non-hybrid cars (µ=65,σx=24). Higher scores indicate a more positive attitude. A) Is this a one or two tailed test? B) In words what is the H0 and Ha? C) Perform the z-test. D) What do you conclude about the attitudes here? E) Report your results in the correct format.
2. We measure the self esteem scores of a sample of statistics students, reasoning that this course may lower their self esteem relative to that of the typical college student (µ=55 and σx=11.35) We obtain these scores:
44 55 39 17 27 38 36 24 36
A) Summarize your sample data. B) Is this a one tailed or two tailed test? Why? C) What are the H0 and Ha? D) Compute zobt E) With α = .05 what is zcrit? F) What should we conclude about the relationship here?
a) Find the 95% confidence interval for the population mean based on the 37 patients who remain after you drop the outlier. b) Compare your interval in (a) with your interval from Exercise 18.32. What is the most important effect of removing the ou..
What is the difference between the critical-value method and the p-value method of hypothesis testing? Include in your post how the question's topic pertains to your health discipline.
A sample of 500 respondents in a large metropolitan area was selected to study consumer behavior. Among the questions asked was "do you enjoy shopping for clothing?" Of 240 males, 136 answered yes.
A researcher estimates an AR(1) model with an intercept and finds that the OLS estimate of Beta1 is 0.95, with a standard error of 0.002.
What does the coefficient of determination tell you about the variation attendance and the variation in the number of exhibitors?
Suppose you have the experiment of flipping a coin three times.
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
In a perfectly symmmetrical distribution: a) the range equals the interquartile range b) the interquartile range equals the mean c) the median equals the mean d) the variance equals the standard deviation
Assuming that the process is operating correctly according to specifications, what is the probability that a sample will indicate that an adjustment is needed?
Their resting heart rates were measured. A partial ANOVA table is given.
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
Machine which fills quart milk cartons is set up to average 32.2 oz per carton, with standard deviation of 1.2 oz. Determine probability that filled carton will contain less than 32 oz of milk?
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