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A physician employed by a large corporation believes that due to an increase in sedentary life in the past decade, middle-age men have become fatter. In 1995, the corporation measured the percentage of fat in their employees. For the middle-age men, the scores were normally distributed, with a mean of 22%. To test her hypothesis, the physician measures the fat percentage in a random sample of 12 middle-age men currently employed by the corporation. The fat percentages found were as follows: 24, 40, 29, 32, 33, 25, 15, 22, 18, 25, 16, 27. On the basis of these data, can we conclude that middle-age men employed by the corporation have become fatter? Assume a directional H1 is legitimate and use ?= 0.05 (1 tail) in making your decision.
in order to be effective reflective highway signs must be picked up by the automobiles headlights. to do so at long
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is
If 9 measurements are randomly selected from this population, what is the probability that the sample mean will exceed 104?
the owner of brittens egg farm wants to estimate the mean number of eggs laid per chicken. a sample of 19 chickens
Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance.
A Hot Fudge Sundae has on average 12 ounces of ice cream. If I were to set up a hypothesis test to test the ability of a new employee making the hot fudge sundae with an average of 12 ounces of ice cream
FIN10002: Financial Statistics - you need to produce a report by generating responses to six tasks presented below. For some of these sections, you will need to use Excel to generate statistical output (statistical analyses and graphs).
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop. (b) Check the normality assumption. (c) Try the Very Quick Rule.
Using the data below., develop a multiple regression model to predict score (rating) based on restaurant type (0 = Italian and 1 = Seafood/Steakhouse) and price of a meal in dollars
Roll a die and record the count of spots on the up-face: P(1) = 1/3, P(2) = 0, P(3) = 1/6, P(4) = 1/3, P(5) = 1/6, P(6) = 0.
The NBA teams with the 13 worst records at the end of the season participate in a lottery to determine the order in which they will draft new players for the next season. How many different arrangements exist for the drafting order for these 13 te..
suppose we draw 13 cards out of a deck of 52. what is the expected value of the number of aces we
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