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2. In an article (Nanci Hellmich, " 'Supermarket Guru' Has a Simple Mantra," USA Today, June 19, 2002, 70) it was claimed that the typical supermarket trip takes a mean of 22 minutes. Suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. The mean shopping time for the sample of 50 shoppers was 25 minutes with a standard deviation of 8 minutes. Using the 0.05 level of significance, is there evidence that the mean shopping time at the local supermarket is different from the claimed value of 22 minutes? Use a one-sample hypothesis test.
Although the packet claims a germination rate of 92%, only 171 or 200 test seeds sprout. Is this evidence that the seeds have lost viability during a year in storage?
Determine the minimum sample size required in order for you to be confident that your evaluate is within of? Use value for population standard deviation of scores on this subsection.
As sample size increases, the standard error of M _______________ .
question 1the subsequent set of data is the mark for 30 students in a final exam.a use spss commands analyze -gt
What is the relationship between descriptive statistics and Affirmative Action ? Can using probability in market trending decisions lead to a bad decision? Explain?
In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have VCRs. The p-value associated with the test statistic in this problem is approximately equal to?
The 2009 National Assessment of Educational Progress (NAEP) gave a mathematics test to a random sample of eighth-graders in Texas. The mean score was 287 out of 500. To give a confidence interval for the mean score of all Texas eighth-graders, you..
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportion of children are overweight?
A statistics professor would like to determine whether students in the class showed improved performance on the final exam as compared to the midterm examination.
The following table describes the estimated green power sales by renewable energy in 2008: Develop a bar chart, pie chart, and Pareto Chart.
Base on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
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