Math Answers

EXPERIMENT

1. Number of rings before the phone is

answered

2. Teacher ask the students to finish the

test after an hour

3. Number of complaints per day

4. Height of the tallest building in Lucena

City

5. Number of Mobile phones in a

household

Number X or the

Random Variable X

1.

2.

3.

4.

5.

Types of Random

Variable

1.

2.

3.

4.

5.

Problem 1: School A has a mean population IQ of 100 with a standard deviation of 15. A principal of the said school claims that the students in his school have above average intelligence. A random sample of 30 students IQ scores have a mean score of 112. Is there sufficient evidence to support the principal’s claim at 5% alpha? Problem: State the level of significance. *

A coin was flipped four times. Let T be the number of tails that come out.

A. Construct the probability distribution of the random variable

B.Construct the probability histogram

In a country there are 48000 people in the defence services. They work in the army, navy and air force in the ratio 5:2:3 . how many people are in each service?

Two coins are tossed. Let H be the number of tails that occur. Determine the values of the

random variable H.

If 12% of a population of parts defective,what is the probability of randomly selecting 60 parts and finding that 8 more are defective?

find the value of x,

x²+2x+1=0

A pair of dice is rolled thrice. What is the probability of getting doubles in the three rolls?

A four-digit number is formed using the digits 1, 2, 3, 5, 8, and 9. What is the probability that the number formed is even?

How many four-letter words can be formed using the letters of the word WOMAN?