The weight of trucks traveling on a particular section of i-475 have a population mean of 15.8 tons and a population standard deviation of 4.2 tons. what is the probability a state highway inspector could select a sample of 49 trucks and find the sample mean to be 14.3 tons or less

0.0062

Step-by-step explanation:

Given : The weight of trucks traveling on a particular section of I-475 have a population mean of tons and a population standard deviation of tons.

Sample size : n=49

Let x be the random variable that represents the weight of trucks .

z-score :

For x= 14.3 tons

Now, the probability a state highway inspector could select a sample of 49 trucks and find the sample mean to be 14.3 tons or less will be :-

Hence, the probability a state highway inspector could select a sample of 49 trucks and find the sample mean to be 14.3 tons or less =0.0062

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

i think asking google will you get the answer to that question