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Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.
You might find the probabilities using the Table or software of your choice. Please explain how you obtained your results.
Interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed: what is the chance? Why is your sample not an SRS?
People arrive at a restaurant at a rate of five per minute and wait to receive their order for an average of 5 mins. Customers eat in with a probability of 0.5 and carry out with a probability of 0.5.
The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year.
You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using..
The test question is: Should a merit raise be given? What is your conclusion? State the null and alternative hypotheses in symbolic form. State the null and alternative hypotheses in word form.
If we assume all the possible random samples of 250 students at this university, 95 percent of the samples should have means among what two numbers.
What is the probability of selecting a sample of n=9 scores with a mean less than M=34? What is the probability of selecting a sample of n=36 scores with a mean less than M=34?
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
The mileage per day is distributed normally. Find the probablitly that a truck drives at least 133 miles in a day. Round your answer to 4 decimal places.
The following confidence interval is obtained for a population proportion, p:(0.458, 0.490). Use these confidence interval limits to find the point estimate, p-hat.
Average salary of $27,839 with a standard deviation of $7,400. At the 0.01 significance level, do teachers with Master Degrees have higher salaries?
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