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A study is done to determine which of two soft drinks has more sugar. There are 13 cans of Beverage A in a sample and six cans of Beverage B. The mean amount of sugar in Beverage A is 36 grams with a standard deviation of 0.6 grams. The mean amount of sugar in Beverage B is 38 grams with a standard deviation of 0.8 grams. The researchers believe that Beverage B has more sugar than Beverage A, on average. Both populations have normal distributions.
a. Are standard deviations known or unknown?
b. What is the random variable?
c. Is this a one-tailed or two-tailed test?
Portfolio B's yearly return is normally distributed with a mean of 0.04 and a standard deviation of 0.06. Based on this information, what is the probability that over the next year, the return on portfolio A is lower than the return on portfolio B?
A manager of a large department store with three floors reports that the time a customer on the second floor must wait for an elevator has a uniform distribution ranging from 0 to 16 minutes. It takes the elevator 1 minute to go from floor to floo..
Is it reasonable to assume that whether someone drives a red pickup truck, smokes cigarettes, and has blond hair are all independent traits? Explain.
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the lenght of time x to complete a standard achievement test is approximately normally distributed with a mean of 58
According to ABI Research Company, more than 75% of the people who go to WAWA purchase candy. A random sample of 400 people showed that 312 people purchased candy. Can you conclude at the .01 significance level the claim of more than 75% of WAWA's..
a sample of n 9 has a mean of m 72 with ss 162. use the sample to make a point estimate of u and to construct the 90
Develop dummy variables that will account for the player's position. Develop an estimated regression equation to show how rating is related to position, weight, and time to run 40 yards
Interpret the Regression equation results including the intercept, slope and the Coefficient of Determination. Test to determine if there is a significant negative relationship between the independent and dependent variable
Make a decision regarding the null hypothesis. Is there a significant correlation between a runner's finishing place and the amount the runner trained?
Standard deviation of $47.11. Use the normal distribution to estimate the percent of homes selling for more than $280.00.
when a bus service reduces fares a particular trip from new york city to albany new york is very popular. a small bus
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