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Applying the rule 68-95-99.7 rule. When designing the placement of a CD player in a new model car, engineers must consider the forward grip reach of the driver. Women have forward grip reaches that are normally distributed with a mean of 27.0 inches and a standard deviation of 1.3 inches. Use the 68-95-99.7 rule to find the indicated quantity.
a. Find the percentage of women with forward grip reaches between 24.4 inches and 29.6 inches.
b. Find the percentage of women with forward grip reaches less than 30.9 inches.
c. Find the percentage of women with forward grip reaches between 27.0 inches and 28.3 inches.
The estimated age-adjusted percent of persons 18 years of age and over who smoke cigarettes are shown below for females and males for selected years.
Create the 99% confidence interval on difference of average ages for viewers of the two TV programs. How can you interpret interval?
a coin is flipped until heads occur twice. define two random variables x and y to be the trial numbers at which the
When comparing the mean annual incomes for executives with a High School education or less and Undergraduate Degree, the 95% confidence interval shows an interval of 11.7 to 42.7 for the difference. This result indicates that
Draw the pmf of the Poisson distribution that results when the parameter α is equal to the following:
She believes that the number of customers served on weekdays follows a normal distribution. Construct an 99% confidence interval of the average number of customers served on weekdays.
to get a c in history nandan must average 74 on four tests. scores on the first three tests were 69 74 and 65. what is
The true population regression function, it isn"t. Before leaving this section we should ask and answer the following question. What"s so special about polynomials?
To reduce operating costs, First UP Bank wants to make sure that the loan department in its branches manage the number of courier packages sent out to appraisers etc.
A simple random sample of 50 speeds (in mph) is obtained from cars traveling on a section of I-10 through Tallahassee. The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the ..
Give examples of how quadratic equations can be used to solve everyday problems.
1.a researcher was interested in determining whether incentives affect the response rate in surveys. a simple random
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