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The heights of adult men in America are normally distributed, with a mean of 69.8 Inches and a standard deviation of 2.62 Inches. The heights of adult women in America are also normally distributed, but with a mean of 64.3 Inches and a standard deviation of 2.56 Inches.
a) If a man is 6 feet 3 inches tall, what is his z-score (to two decimal places)?
z=
b) If a woman is 5 feet 11 inches tall, what Is her z-score (to two decimal places)?
researchers found a correlation coefficient of r .50 on personality measures for identical twins. a reporter
The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies.
a real number x is drawn at random from the interval 01. a rectangle is formed with sides x and 1-x. denote the area by
In determining automobile mileage ratings, it was found that the mpg in the city (x) for a certain model is normally distributed, with a mean of 24 mpg and a standard deviation of 1.0 mpg. Find the following:
In which of the following three samples will the margin of error be the smallest? Explain. Assume that each sample is a random sample.
The average diameter of 100 sand dollars that make up a collection is 3.50 centimeters with a standard deviation of 0.80 centimeters.
Upon reviewing the accounting records from the restaurant, you discover that it grosses roughly $3000 per day on 6 out of 10 days. Determine the estimated probability that the restaurant will gross over $3000:
If the difference between two means is not statistically significant, how certain are you that the independent variable really does not affect the dependent variable?
Could such a low average be considered just bad luck or should he be sent back to the minor leagues? Comment on the assumption of Bernoulli trials in this situation.
What structures in the small intestine increase the internal surface area? What advantage is gained by this increase in surface area?
a lottery commission offers four different lottery games to play three-number four-number five-number and five-number
1. Which variables are the participant variables? (They act as independent variables in this study.)
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