Homework: HW 5.2 Score: 0 of 1 pt 5.2.19 Save 11of15(5complete) Score: 18.22%, 2

Question

Homework: HW 5.2 Score: 0 of 1 pt 5.2.19 Save 11of15(5complete) Score: 18.22%, 2.73 of 15 pt Question Help The accompanying table describes results of roadworthiness tests of cars that are 3 years old. The random variable x represents the numbers of cars that failed among six that were tested for roadworthiness. Find the mean and standard deviation for the number of cars that failed among the six cars that are tested. Click the icon to view the data. Find the mean for the number of cars that failed. -O (Round to one decimal place as needed.)

Explanation / Answer

Using definition of mean we get

Hence the mean is 1.338

x P(x) xP 0 0.357 0 1 0.257 0.257 2 0.179 0.358 3 0.109 0.327 4 0.098 0.396 5 0 0 6 0 0 Total 1 1.338

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