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A researcher wanted to compare food ratings at restaurants located in the city with those located in the suburbs. She randomly selected 50 urban and 50 suburban restaurants, collected data on food ratings at each of those restaurants, and conducted a 2-sample t-test. A p-value of .141 resulted. State the null and alternate hypotheses, state whether the null hypothesis should be rejected or not rejected and your reason for that conclusion, state the meaning of that conclusion specifically in terms of the problem being studied.
Supposing a linear relationship, use the least squares method to find the regression coefficients b 0 and b 1 .
Calculate the missing values in the following. The F ratio is = 5.00 between treatments SS DF Ms If withing treatments has a SS of 96, what is the degree of fredom and MS.
calculate the mean deviation form 1 arithmetic mean 2 median 3 mode in respect of the marks obtained by nine students
Consider that 10 observations were selected from a normal population whose variance is 64. Observations are: 58, 62, 45, 50, 59, 65, 39, 40, 41 and 52.
The gambler is paid later as follows, depending on the number of winners he picked. What is his expected gain? Remember, a loss is a negative gain, and that the bookie keeps the gambler's $20.
q1 a researcher suggests that male nurses earn more money than female nurses. a survey of 16 male and 20 female
A simple random sample of 50 speeds (in mph) is obtained from cars traveling on a section of I-10 through Tallahassee. The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the ..
Find out the test statistic P-value, and critical value, and state the final conclusion. The mean IQ score of statistic professors is less than 120. Sample data: n = 46. Suppose that = 17, and the significance level is = 0.05.
The length of pregnancies are normally distributed with a mean of 268 days and standard deviation of 15 days. How many days do 80 percent of women last until in their birthing process?
A job placement director claims that the average starting salary for nurses is 24,000.A sample of 10 nurses' salaries has a mean of 23, 450 and a standard deviation of 400. Is there enough evidence to reject the director's claim at 0.05 level of s..
a standardized third grade reading test called the we can read test has a mean of 50 with a standard deviation of 10. a
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
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