The mean number of words per minute (wpm) read by sixth graders is 89 with a variance of 625. if 96 sixth graders are randomly selected, what is the probability that the sample mean would be greater than 93.02 wpm? round your answer to four decimal places.

The z-score of the information given is:
z=(x-μ)/σ
where
μ-mean
σ- standard deviation

from the information given:
x=93.02
μ=89
σ=√625=25
hence
z=(93.02-89)/25
z=0.1608
thus
P(X≥x)=1-0.5636=0.4364=43.64%

You essentially earn 5.5 - 1.15  = $4.35 per hour because of the taxes and benefits. So in this case, your coefficient for your x is how much you earn per hour, or 4.35. You spend 3.75 × 5 = $18.75 per week on food. This subtracts from the total amount of money you earn per week. Let's say y is the amount of money you earn per week. The equation would be y = 4.35x - 18.75.
a. y = 4.35x - 18.75
b. The slope represents the amount of money you earn per hour after taxes and benefits. The y-intercept represents how much money you lose after a five day week from buying lunches.