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Two rainstorms occurred in one week in a certain area. The first storm lasted 20 hours, and the second storm lasted 40 hours, for a total 1400 mL of rain. What was the rate of rainfall for each of the two storms if the sum of the two rates was 45mL per hour?
The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.
Develop a probability distribution for the number of travelers who plan their trips within two weeks of departure.
The standard deviation of 6. What is the probability that a class of 50 has an average midterm mark that is less than 75?
The NAEP test was also given to a sample of 1077 women of ages 21 to 25 years. Their mean quantitative score was 275. Take it as known that the standard deviation of all individual scores is = 60.
If a proposal evaluator randomly selected two proposals, what is the probability that both of them met the specified?
The Weithoff company has a contract to produce 10000 garden hoses for a customer. Weithoff has 4 different machines that can produce this kind of hose.
Random samples of populations (in thousands) of U.S. cities in three sections of the country are listed. Is there evidence to conclude a difference in means at the 0.001 level of significance?
Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us?
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
Find/discover an example of statistics in the news to discuss the following statement that represents one of the objectives of statistics analysis: "Statistics helps us make decisions based on data analysis.
The McBurger restaurant chain claims that the waiting time of customers for service is normally distributed with a mean of 3 minutes and a standard deviation of 1 minute.
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