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Restaurateur Danny Valentine is evaluating two, sites, Raymondville and Rosenber, for his next restaurant. Denny suspects that Raymondville residents (population 1) dine out more often (number of times per month) than Rosenberg residents (population 2).
Denny commissions a market survey to test his hypothesis. The market researcher used a random sample of 64 families from each suburb and recorded the number of times each population dines out.
The market researcher finds that the sample difference in the mean number of dine out times is 3.54 population1 - population 2. The calculated two-tail p-value =.03. Assuming alpha=.02
Should the hypothesis null hypothesis be rejected or accepted, or the alternate hypothesis?
Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y:
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
Use the Standing data set to develop a point estimate of the number of minutes during an NFL game that players are standing around between plays. Round your answer to two decimal places. What is the sample standard deviation? Round your answer to ..
A geologist has collected 10 specimens of basaltic rock and 10 specimens of granite. The geologist instructs a laboratory assistant to randomly select 15 of the specimens for analysis.
Test whether the weight reducers on average will lose less than 10 pounds using P-value approach.
Median can be a more suitable measure of central tendency than mean if distribution of data is extremely skewed.
A business has 5 telephone lines. The first rings every minute on the average, the second every ½ minute, the third every 2 minutes, the fourth every 5 minutes,
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
At the 0.05 level of significance, test whether the mean baseline body mass index for the population of middle aged men who develop diabetes is equal to 24.0 kg/m 2 , the mean for the population of men who do not. What is the p-value of the test?
There is uneasiness that the users of paper coupons are different from the users of e-coupons (coupons disseminated by means of the Internet).
Write the example of statistics in news to explain the following statement which represents one of the objectives of statistics analysis: "Statistics assists us make decisions.
You take a random sample around town and calculate a p-value for your hypothesis test of 0.0913. What is the appropriate conclusion? Conclude at the 5% level of significance.
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