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In a high school graduating class of 100 students, 54 studied mathematics, 69 studied history, and 35 studied both mathematics and history. If one of these students is selected at random, find the probability that (i) the student took mathematics or history; (ii) the student does not take either of these subjects; (iii) the student takes history but not mathematics.
A loaf of bread is normally distributed with a mean of 22 oz and a standard deviation of 0.5 oz. What is the probability that a loaf is more than 22.25 oz?
Smaller the p-value in test of hypothesis, the more important the results are.
Create a 90% confidence interval for proportion of all kernels that would not pop.
Customers with Internet access, (b) between 97% and 99% of the customers with Internet access, and (c) fewer than 97% of the customers with Internet access?
A standard deviation of mg/dL. What is Mrs. Brown's cholesterol level? Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the most recent election.
Using the .01 level, what should the researcher conclude? Solve this problem explicitly using all five steps of hypothesis testing, and illustrate your answer with a sketch showing the comparison distribution, the cutoff (or cutoffs), and the scor..
Normal adult Mean Temperature is 98.2 and standard deviant is 0.62 with normal distribution. If 16 people are randomly selected determine the probability that their mean body temp is below 98.5 degrees.
What is the average time a car waits to begin the wash job? What is the average number of cars in the car wash system? What is the average time required to wash a car?
Using the .02 level of significance, conduct a five-step hypothesis testing procedure to determine if the new processes significantly reduced the wait time.
Tourism is one consideration for a company's future. A survey of 1,233 visitors to China last year revealed that 110 people visited a Starbucks during their visit.
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
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