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Worldwide it is understood that IQ scores follow a normal distribution. It is assumed that the middle 95% of the population has an IQ between 70 and 130 with a mean of 100. Use this information to d
Worldwide it is understood that IQ scores follow a normal distribution. It is assumed that the middle 95% of the population has an IQ between 70 and 130 with a mean of 100. Use this information to
The average height of a female in the United States is 63.7 inches with a standard deviation of 2.7 inches. Assume that the population is normally distributed and an American female is randomly sele
1. In the United States the average weight of an adult male is 172 pounds with a standard deviation of 29 pounds. Assuming that the population follows a normal distribution, use the empirical rule t
A toll bridge charges $1.00 for a passenger car and $2.50 for other vehicles. Experience suggests that 60% of vehicles crossing the bridge are passenger cars. If 25 vehicles cross the bridge in an h
Write about the use of hypothesis testing in the context of your life or business. Provide a real-world case example of how and when hypothesis tests are used. Identify the following:
Assume the readings on thermometers are normally distributed with a mean of 0 degrees Celsius and a standard deviation of 1.00 degrees Celsius. Find the probability that a randomly selected thermome
Consider the experiment of drawing two cards from a shuffled deck and then getting them back, where "success" is now defined as drawing a king and a queen. If this experiment is repeated 100 times,
Suppose an urn contains 7 red balls, 7 green balls, and 7 blue balls, where the balls of each color are labeled with the numbers 1 through 7. If 5 balls are drawn at random, find the probability of
A new no-frills airline runs a commuter shuttle service using a refurbished World War II bomber. The two-propeller plane will fly only if both of its engines function. Suppose that P(port engine fa
Consider the experiment of drawing two cards from a shuffled deck and then putting them back. What is the probability that no more than 3 applications of this experiment will yield a heart and a dia
For each of the following questions, explain whether a confidence interval for a mean response or a prediction interval for a new observation is appropriate:
Find the expected value of the promotion per customer for the department store. If the store has 720 customers on the promotional Saturday, what is the expected revenue for the day?
Die A is numbered 1,2,3,4,5 and 6. Die B is numbered 2,2,4,4,6 and 6. A fair coin flipped. If it is heads, die A is rolled, otherwise die B is rolled. Given the die roll was even, find the probabilt
If one person gets an outcome didi erent from those of the other two, then he is the odd man out. If there is no odd man out, the players flip again and continue to do so until they get an odd man o
Are many women being denied the opportunity to join this branch of the military because they are too short or too tall? No, because the percentage of women who meet the height requirement is fairly sm
If np>5 and nq>or equal to 5, estimate P(more than 7) with n=11 and p=0.6 by using the normal distribution as an approximation to the binomial distribution; if np,5 or nq<5, then state that
Suppose two dice are rolled repeatedly and the sum T of the two numbers is to be observed for each roll. What is the probability that the value T = 11 will be observed before the value T = 7 is obse
A committee of 3 people is to be selected randomly from one of two classes.class a has 5 men and 5 women. Class b has 4 men and 6 women. A fair coin is tossed to determine which class is chosen to s
The employees of Cartwright Manufacturing are awarded efficiency ratings. The distribution of the ratings approximates a normal distribution. The mean is 412, the standard deviation 65. What is the
Now suppose the true standard deviation of annual apple consumption weights is unknown. If 70% of all weights were less than 22 pounds, what would the standard deviation of annual apple weights be?
Assume that the significance level is a=0.05. Use the given information to find the P-value and the critical value(s).
When circuit boards used in the manufacture of compact disc players are tested, the long-run percentage of defectives is 5%. Let X = the number of defective boards in a random sample of size n = 20,
What is the chance the student majors in engineering? Given that the selected student major in engineering, what is the chance that the student is a female? What is the chance the selected student is