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In a statistics class of 15 students there are 6 smokers. The smokers have pulse rates of: 68, 80, 98, 100, 88, 92. The nonsmokers have pulse rates: 84, 60, 63, 86, 78, 68, 91, 63, 72. Do a relevant test to determine if there is any di erence between the pulse rates of smokers and nonsmokers. Compute the p-value of the test. Can you draw any conclusions?
Then turn up cards from the top until the first ace appears. What is the expected value of the number of cards required to produce the first ace?
A recent study at a local college claimed that the proportion of students who commute more than fifteen miles to school is no more than 25%.
Is there evidence to suggest that the training course helps out sales people?
Sketch a graph and shade the area of interest. SCores on a standardized exam are normally distributed with u = 60 and o = 5.
Assuming the nurses surveyed were a simple random sample from the population of all nurses in the United States, find the appropriate null hypothesis for these data
To find out the alternate hypotheses also critical value. A truck dealer claims where a new model will give trouble free service for at least 15,000 miles.
Thirty-five percent of the Democrats and 70% of the Republicans favor the bill. The bill needs a simple majority to pass. Using a probability tree, determine the probability that the bill will pass.
The number customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of 200. The supermarket is open 16 hours per day.
At the .05 significance level, can we conclude that the guideline is still reasonable?
Develop the estimated regression line. Jensen expects to use the machine 30 hours per week, develop a 95% prediction interval for the company's annual maintenance expense.
At the end of the training program, the attitude of each trainee was measured on a 100-pt. scale (the lower the score, the poorer the attitude). How many treatments are in this experiment?
Five hundred draws are made at random with replacement from a box of numbered tickets; 276 are positive. someone tells you that 50% of the tickets in the box show positive numbers.
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