A survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone. Determine a point estimate for p, the population proportion of non-fatal accidents that involved the use of a cell phone.

represent the number of non-fatal accidents involved the use of a cell phone

represent the sample size

And we want to find a  point estimate for p, the population proportion of non-fatal accidents that involved the use of a cell phone and we can use the following formula:

And replacing we got:

Step-by-step explanation:

For this problem we have the following info given:

represent the number of non-fatal accidents involved the use of a cell phone

represent the sample size

And we want to find a  point estimate for p, the population proportion of non-fatal accidents that involved the use of a cell phone and we can use the following formula:

And replacing we got:

b. 24 mm

step-by-step explanation:

use the pythagorean theorem.

a^2 + b^2 = c^2

a^2 + 7^2 = 25^2

a^2 + 49 = 625

a^2 = 576

a = 24

answer: b. 24 mm

d. is the correct answer

step-by-step explanation: