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Sketch the distribution of bob's results, and show graphically ( with numbers added ) how likely he is to finish at least second? How likely is it that an American winds the Gold Medal?
The time between arrivals of large comets on earth is exponentially distributed with a mean of one year. What is the shorterst period of time during which you have at least 90% probability of seeing a
We want to conduct a hypothesis test to see if the true proportion of high school students in Ohio who tried marijuana is now less than 45%. Use alpha = .01. What is the standard error for this test
Does the data provide compelling evidence for concluding that true average power for the Head raquet exceeds that for the Prince power by more than 20 ? Test the appropriate hypotheses using the P-v
To decide whether two different types of tennis raquet have the same true average power, different raquets have been tested. These are the results
A survey of 200 ninth-graders found that 31.5% had used cigarettes in the past week, and a survey of 250 high-school seniors found that 35.2% had used cigarettes in the past week. Is there significa
Let X denote the amount of space occupied by an article placed in a 1-ft^3 packing container. The pdf of the continuous random variable X is
Small Sample Mean Problem. The maker of Mini-Oats Cereal uses an automated packaging machine to pack its 24 ounce box of cereal. At the end of every shift 16 boxes are selected at random and tested
At the end of every shift 16 boxes are selected at random and tested to see if the equipment needs to be readjusted. After one shift, a sample of 16 boxes yielded the following data. mean = 24.33 s
Does the data provide compelling evidence for concluding that true average power for the Head raquet exceeds that for the Prince power by more than 20 ? Test the appropriate hypotheses using the P-
What has requirements about the shape of population? the answer has 15 letters total.
In a Probability class, 45% of the students pass the class, 20% of the students fail the class, and 35% of the students drop the class. Of those passing the class, 80% enjoy the class. What is the
The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other cit
Calculate the odds ratio (X) for the risk between gender and all-cause mortality, when age and race are controlled using the table of data below. Record your answer with two decimal places.
Select the most appropriate test statistic and run the appropriate test at a 5% level of significance. Calculate the appropriate test statistic (step 4 of the hypothesis testing). Round to 3
What are some other difference between test for independent groups and t test for matched groups? Do they both use the same set of assumptions? Why do we even need two different tests to analysis th
What is variable that affects others but is not being studied?
There are examples of deceptive statistics everywhere - visual data presentations (charts/graphs)-from magazines to newspaper articles. Locate a particularly outrageous chart/graph and interview peo
Develop the null and alternative hypotheses to determine whether the schedule adjustment reduced the average lateness time of 12 minutes.
Write the null for this: the average hemoglobin at admission less than 12.5. Is the mean enrollment hemoglobin for males different than the mean enrollment hemoglobin for females? (Null and Alterna
The best predicted pulse rate of a woman i=who is 69 in tall is ____ beats per minute.
At \alpha = 5%, is there a significant difference in proportion? Compute the p-value and round to 4 significant decimal places.
Assume that P1 is the Percentage of Lipitor users that developed infection. Test the hypotheses and compute the p-value rounded to 4 decimal places.
Based on the current sample, the standard deviation is equal to $21. Find a 90% confidence interval for the population mean level of spending per hour.
The coach takes a random sample of 43 players and finds the average number of free throws shot per practice was 225 with a standard deviation of 35. Construct a 99% confidence interval for the avera