Problem 4 The scores of individual students on the American College Testing (ACT)
composite college entrance examination have a normal distribution with mean
18.6 and standard deviation 5.9.
4a. What is the probability that a single student randomly is chosen from all those
taking the test, scores 21 or higher? Round your percentage to 2 decimals.
Your answer
4b. What is the probability that the mean score of an SRS of 40 students chosen
from all those taking the test is 21 or higher? Round your percentage to 2
decimals.
Your answer

(co 3) the soup produced by a company has a salt level that is normally distributed with a mean of 5.4 grams and a standard deviation of 0.3 grams. the company takes readings of every 10th bar off the production line. the reading points are 5.8, 5.9, 4.9, 6.5, 5.0, 4.9, 6.2, 5.1, 5.7, 6.1. is the process in control or out of control and why? it is out of control as two of these data points are more than 2 standard deviations from the mean it is in control as the data points more than 2 standard deviations from the mean are far apart it is out of control as one of these data points is more than 3 standard deviations from the mean it is in control as the values jump above and below the mean

What graph represents an even function

How much is $1200 worth at the end of1 year,if the interest rate is 5.5% is compounded quarterly.