Statistics and Probability Answers

2. What is the area of z = - 1.21 ?

A. 0.3665

B, 0.3869

3. What is the equivalent z-score of P_{23} ?

A. 0.67

B. plus/minus 1.29

4. What is the area of below z=2.11?

A. 0.4826

B. 0.0174

C. 0.4821

C, plus/minus 0.68

C. 0.9826

5. What is the area between the z-score z = - 3.03 and z = 1.32 ?

A. 0.0922

B. 0.4066

C. 0.4988

D. 0.4826

D. pm1.28

D. 0. 5174

D. 0.9054

A. The following numbers are the number found at the left side and upper part of

the table. Identify the number that lies on the intersection between the given set

of numbers. Use the Table of the Area Under Normal Curve indicated at the last

page of this module

1. -1.6 and 0.09 = ________

2. 1.0 and 0.07 = _________

3. 1.1 and 0.06 = _________

4. 0.5 and 0.08 = _________

5. 1.0 and 0.00 = _________

Three airlines serve a Srinagar, Airline “Amira” has 50% of all the scheduled flights, airline “Biyas” has 30% and airline “ Chinar “ has the remaining 20% .Their own time rate are 80% , 65% and 40% respectively.

·        Draw the probability tree diagram

·        A plane has just left on time. What is the probability that it was airline “ Amira”

according to its label, each coffee bag in a box contains 4g of coffee powder.in actual fact, the mass of coffee powder per bag has a mean 4.05g and a standard deviation of 0.05g. assuming that the mass of coffee powder in each bag is distributed normally, calculate the expected number of coffee bags which contain 3.95g to 4.10g of coffee powder in a box of 300 bags.

(Probability Distribution)

1. If one ball each is drawn from 3 boxes, the first containing 3 red, 2 yellow, and 1 blue, the second box contains 2 red, 2 yellow, and 2 blue, and the third box with 1 red, 4 yellow, and 3 blue. What is the probability that all 3 balls drawn are different colors?
2. In a viral pool test it is known that in a group of five (5) people, exactly one (1) will test positive. If they are tested one by one in random order for confirmation, what is the probability that only two (2) tests are needed?

(Distribution Probability)

1. A small-time bingo card costs P100.00 for 5 games. The prize for the first three games is P5,000.00, the fourth is P10,000.00 and the last prize is P20,000.00. If 1,000 bingo cards are going to be sold and you could only win once, what is the expected value of a ticket?
2. You pick a card from a deck. If it is a face card, you will win P500.00. If you get an ace, you will win P1,000. If the card you picked is red you get P100.00. For any other card, you will win nothing. Find the expected value that you can possibly win.