1. A probability experiment was conducted. Which of the following cannot be considered and outcome of the experiment? a. ( rac{1}{3} ) b. 0.80 c. 0 d. 22 2. The data below represents the number of miles run during one week for a sample of 20 runners. Find the mean of the distribution. The grouped mean formula is given below" Note: the formula for group mean is ( X=rac{Sigma f x_{m}}{n} ) where ( f ) is frequency, ( x_{m} ) is the midpoint of ( x ) and ( mathrm{n} ) is total frequency 3. An instructor grades exams, ( 20 % ); term paper, ( 30 % ); final exam, ( 50 % ). A student had grades of 83 , 72 and 90 , respectively, for exams, term paper, and final exam. Find the student's final average. Use the weighted mean. 4. For the numbers below, select a number at random and find the probability that: a. The number is even b. The sum of the number's digit is even c. The number is greater than 50 5. A couple has three children. Find the probability that: a. All are boys or girls b. Exactly two are boys or girls
1.A probability experiment was conducted.Which of the following cannot be considered and outcome of the experiment?
b.0.80
d.22
2. The data below represents the number of miles run during one week for a sample of 20 runners. Find the mean of the distribution. The grouped mean formula is given below
Class 5.5-10.5 10.5-15.5 15.5-20.5 20.5-25.5 25.5-30.5 30.5-35.5 35.5-40.5
Frequency 1 2 3 5 4 3 2
Midpoint
fx
n is total frequency
3, An instructor grades exams,20%;term paper,30%final exam,50%.A student had grades of 83, 72 and 90,respectively,for exams,term paper,and final exam.Find the student's final average. Use the weighted mean.
4.For the numbers below,select a number at random and find the probability that: a.The number is even b.The sum of the number's digit is even c.The number is greater than 50
5.A couple has three children.Find the probability that: a.All are boys or girls b. Exactiy two are boys or girls