The scores of students taking the ACT college entrance examination are normally distributed with a mean µ = 20.1 and a standard deviation σ = 5.8.

a)    A single student is selected at random. Determine the probability that their ACT score was between 18 and 24.

b)    Determine the probability that a simple random sample of 25 students would earn an average score of at least 22.

Posted Date: 3/13/2013 5:48:27 AM | Location : United States

Ask an Expert

Related Discussions:- A single student is selected at random, Assignment Help, Ask Question on A single student is selected at random, Get Answer, Expert's Help, A single student is selected at random Discussions

Write discussion on A single student is selected at random
Your posts are moderated

Write your message here..

Related Questions

Stat, defination of uper boundarie . defination of uper boundarie .

Rate and ratio, express 4:24 as fraction in lowest term express 4:24 as fraction in lowest term

Mathematical science, state tha different types of models used in operation... state tha different types of models used in operations research.

Substitute 6 for r in the formula a = r^2 and solve for a, Find the area of... Find the area of a circle along with a radius of 6 inches. The formula for the area of a circle is A = πr 2 . Use 3.14 for π. Substitute  6 for r in the formula A = πr 2 and solve

Complex fractions, A small airplane used 5and2over3 gallons of fuel to fly ... A small airplane used 5and2over3 gallons of fuel to fly a 2 hour trip.how many gallons were used each hour

What is the continuously compounded forward rate, At time t an investor s... At time t an investor shorts a $1 face value zero coupon bond that matures at time T = t and uses the entire proceeds to purchase a zero coupon bond that matures at time

Probability, joey asked 30 randomly selected students if they drank milk, j... joey asked 30 randomly selected students if they drank milk, juice, or bottled water with their lunch. He found that 9 drank milk, 16 drank juice, and 5 drank bottled water. If the

Fraction, One day it snowed 3 and 3/8 inches in Altoona and 3.45 inches in ... One day it snowed 3 and 3/8 inches in Altoona and 3.45 inches in Bethlehem. Which city received less snow that day.

''t'' distribution, The 't' distribution is a theoretical probability distr... The 't' distribution is a theoretical probability distribution. The 't' distribution is symmetrical, bell-shaped, and to some extent similar to the standard normal curve. It has an

How many different words can be formed out from varanasi, Determine how man... Determine how many different words can be formed out of the letters of the word VARANASI? Ans: 720 different words can be formed out of the letters of the word VARANASI.