To find the average over 5 times, we have to divide the total by 5. Therefore, 260/5 = 52 = the average change in your account balance each trips. 260 = amount of money you withdraw, 5 = number of trips made by the ATM. We need to divide due to that if something is spread out equally 5 times, what you get in one time clearly won't be all of it

8 0

3 years ago

The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a mean of 60,000 miles and

klasskru [66]

Answer: C) 0.8664.

Step-by-step explanation:

Given, The tread life of tires mounted on light-duty trucks follows the normal probability distribution with $\mu=60,000\text{ miles}\ \&\ \ \sigma=4,000\text{ miles}$ .

Let $\overline{x}$ be the sample mean tire life of any 4 tires.

Now , the probability that the mean tire life of these four tires is between 57,000 and 63,000 miles will be :-

$P(57000$

For Very likely , the probability should lie between 0.95 and 1.

Hence, the correct answer is C) 0.8664.

4 0

3 years ago