Score: 0/7 0/8 answered
Question 2
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B0/1 pt
The average number of miles (in t...
Mathematics, 28.10.2020 20:40 savannah19dw
Score: 0/7 0/8 answered
Question 2
<
B0/1 pt
The average number of miles (in thousands) that a car's tire will function before needing
replacement is 71 and the standard deviation is 20. Suppose that 15 randomly selected tires are
tested. Round all answers to 4 decimal places where possible and assume a normal distribution.
a. What is the distribution of X? X - NG
b. What is the distribution of x? - NO
c. If a randomly selected individual tire is tested, find the probability that the number of miles (in
thousands) before it will need replacement is between 64.1 and 70.
d. For the 15 tires tested, find the probability that the average miles (in thousands) before need
of replacement is between 64.1 and 70.
e. For part d), is the assumption that the distribution is normal necessary? No Yes
Answers: 3
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Explain why the factor 1.5 is broke. into two numbers in the model.
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Neal buys a board game. he pays for the board game and pays $1.54 in sales tax. the sales tax rate is 5.5%. what is the original price of the board game, before tax
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Arrange the steps to solve this system of linear equations in the correct sequence. x + y = -2 2x β 3y = -9 tiles subtract 3x + 3y = -6 (obtained in step 1) from 2x β 3y = -9 (given) to solve for x. substitute the value of x in the first equation (x + y = -2) to get y = 1. the solution for the system of equations is (-3, 1). x = -15 the solution for the system of equations is (-15, 13). add 3x + 3y = -6 (obtained in step 1) to 2x β 3y = -9 (given), and solve for x. x = -3 substitute the value of x in the first equation (x + y = -2) to get y = 13. multiply the first equation by 3: 3(x + y) = 3(-2) 3x + 3y = -6.
Answers: 1
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