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Scores of an iq test have a bell shaped distribution with a mean of 100 and a standard deviation of 16. Use the empirical rule to determine the following.
What percentage of people has an IQ score between 84 and 116? What percentage of people has an IQ less than 68 or greater than 132? What percentage of people has an IQ score greater than 116?
A personnel manager for a large corporation feels that there may be a relationship between absenteeism and age and would like to use the age of a worker to develop a model to predict the number of days absent during a calendar year.
Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? Let p1 refer to the urban population.
suppose the time it takes a data collection operator to fill out an electronic form for a database is uniformly between
suppose that 10 of all steel shafts produced by a process are nonconforming but can be reworked rather than having to
Develop a joint probability table for these data and use the table to answer the remaining questions. What do the marginal probabilities tell you about the age of the US population?
the life expectancy of point-of-sale pos terminals is normally distributed with a mean of 4 years and a standard
How would you describe a distribution? How are descriptions presented graphically and what are normal data and skewed data? How does this distinction play a part in statistical analysis?
What is the mean and standard deviation of the sampling distribution when we take all samples of size25?
Calculate the mean, median, and standard deviation for ounces in the bottles and construct a 95% Confidence Interval for the ounces in the bottles.
the inside diameter of a randomly selected piston ring is a random variable with mean value 12 cm and standard
a. Determine if the problem is either a test of hypothesis, a confidence interval or something else and specify the 'key words' found in the problem that demonstrate your choice.
What is the probability of winning a low, even, red, black, odd, or high bet in the game of American roulette? What is the probability of winning a bet placed on any one particular number, e.g., 33? Notice that under American roulette, there are s..
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