In a recent survey of high school students, it was found that the average amount of money spent on entertainment each week was normally distributed with a mean of $52.30. suppose you are told that there is an 80% probability that a randomly-selected student spends somewhere between $49.74 and $54.86. what is the standard deviation of the amount of money spent by high school students monthly?

Std dev = 0.50

Step-by-step explanation:

Given that in a recent survey of high school students, it was found that the average amount of money spent on entertainment each week was normally distributed with a mean of $52.30.

Also given that

For 49.74 we have x-mean =

For 54.86 we have x-mean =

Hence we have

he standard deviation of the amount of money spent by high school students monthly=0.50

what are the things "represented below"?

step-by-step explanation:

nobody can if you dont give the choices

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)