The daily protein intake of children aged 11-15 in a rural community follows a normal distribution with a mean of 27 grams and a standard deviation of 7 grams. What percent of these children get less...

The daily protein intake of children aged 11-15 in a rural community follows a normal distribution with a mean of 27 grams and a standard deviation of 7 grams. What percent of these children get less...

The cost of 5 gallons of ice cream has a variance of 49 with a mean of 31 dollars during the summer. What is the probability that the sample mean would differ from the true mean by more than...

Suppose that insurance companies did a survey. They randomly surveyed 430 drivers and found that 330 claimed they always buckle up. We are interested in the population proportion of drivers who claim...

A livestock company reports that the mean weight of a group of young steers is 1086 pounds with a standard deviation of 55 pounds. Based on the model N(1086,55) for the weights of steers, what percent...

A computer is programmed to produce at random a single digit from the list 0,1,2,3,4,5,6,7,8,9. The program runs twenty times. Let Y be the number of zeros that occur. a) State the distribution...

Question 7 (1 point) Suppose a car dealership offers a low interest rate and a longer payoff period to customers or a high interest rate and a shorter payoff period to customers, and most...

6. A psychology professor of a large class became curious as to whether the students who turned in tests first scored differently from the overall mean on the test. The overall mean score on the test...

6. A psychology professor of a large class became curious as to whether the students who turned in tests first scored differently from the overall mean on the test. The overall mean score on the test...

According to a recent study, 9.3% of high school dropouts are 16- to 17-year-olds. In addition, 6.4% of high school dropouts are white 16- to 17-year-olds. What is the probability that a randomly...

The heights of a certain type of tree can be assumed to follow a normal distribution. How comes on cannot say, the heights follow a normal distribution? Why should we make the assumption?

Statistics

multiple choice

Fifteen third-grade students participated in a memory experiment. Five students had a story read to them by a teacher, five read the story themselves, and five saw a video of the story. Each student...

if a batter has a season batting average of 280, what is the probability that he will get 3 hits in at-bats in the first game of the playoffs?

The equation used to predict college GPA (range 0-4.0) is Modifying Above y with caret equals 0.16 plus 0.51 x 1 plus 0.002 x 2, where x1 is high school GPA (range 0-4.0) and x2 is college board score...

A SRS of 100 flights of airline 1 showed that 80 were on time. A SRS of 100 flights of airline 2 showed that 64 were on time. Find a 95% confidence interval for p1-p2

The National Association of Realtors estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold in 2004 is obtained what is the probability...

In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total...

Use the P-value method for testing hypotheses. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. The...

At one point the average price of regular unleaded gasoline was $ 3.61 3.61 per gallon. Assume that the standard deviation price per gallon is $ 0.05 0.05 per gallon and use Chebyshev's...

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