Mathematics, 22.04.2021 04:10 kikipie8504
Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures for cellular phone services per consumer unit increased from $242 in 2001 to $619 in 2007. Let the standard deviation of annual cellular expenditure be $64 in 2001 and $204 in 2007. [You may find it useful to reference the z table.]
a. What is the probability that the average annual expenditure of 109 cellular customers in 2001 exceeded $234? (Round "z" value to 2 decimal places, and final answer to 4 decimal places.)
b. What is the probability that the average annual expenditure of 109 cellular customers in 2007 exceeded $596? (Round "z" value to 2 decimal places, and final answer to 4 decimal places.)
Answers: 3
Mathematics, 21.06.2019 13:10
Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50
Answers: 3
Mathematics, 21.06.2019 18:00
The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.
Answers: 1
Mathematics, 21.06.2019 20:00
Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?
Answers: 3
Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures...
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