SaiBook.us Statistics

Lesson Example Discussion Quiz: Class Homework

Quiz In Class

Title: Geometric distribution

Grade: 9-a Lesson: S4-L6

Explanation: Hello Students, time to practice and review. Let us take next 10-15 minutes to solve the five problems using the Quiz Sheet. Then submit the quiz to get the score. This is a good exercise to check your understanding of the concepts.

Quiz: in Class

Problem Id	Problem	Options
1	The discrete random variable X is modelled as being geometrically distributed with parameter 0.2. calculate the value of P(X=3).	A) 0.351 B) 0.059 C) 0.056 D) 0.128
2	It is known that in a certain town 30% of the people own an Apfone.A researcher asks people at random whether they own an Apfone.The random variable X represents the number of people asked up to and including the first person who owns an Apfone.Determine that P( X > 4) .	A) 0.1951 B) 0.2401 C) 0.3258 D) 0.0378
3	The lifetime risk of developing pancreatic cancer is about one in 78 (1.28%). Let X= the number of people you ask until one says he or she has pancreatic cancer.Find the (i) mean and (ii) standard deviation of X	A) 25,45 B) 45,48 C) 78,78 D) 83,85
4	A light bulb manufacturing factory finds 3 in every 60 light bulbs defective. What is the probability that the first defective light bulb with be found when the 6th one is tested?	A) 0.0368 B) 0.105 C) 0.185 D) 0.255
5	If a patient is waiting for a suitable blood donor and the probability that the selected donor will be a match is 0.2, then find the expected number of donors who will be tested till a match is found including the matched donor?	A) 6 B) 2 C) 5 D) 8

Problem Id

Problem

Options

The discrete random variable X is modelled as being geometrically distributed with parameter 0.2. calculate the value of P(X=3).

A) 0.351
B) 0.059
C) 0.056
D) 0.128

It is known that in a certain town 30% of the people own an Apfone.A researcher asks people at random whether they own an Apfone.The random variable X represents the number of people asked up to and including the first person who owns an Apfone.Determine that P( X > 4) .

A) 0.1951
B) 0.2401
C) 0.3258
D) 0.0378

The lifetime risk of developing pancreatic cancer is about one in 78 (1.28%). Let X= the number of people you ask until one says he or she has pancreatic cancer.Find the (i) mean and (ii) standard deviation of X

A) 25,45
B) 45,48
C) 78,78
D) 83,85

A light bulb manufacturing factory finds 3 in every 60 light bulbs defective. What is the probability that the first defective light bulb with be found when the 6th one is tested?

A) 0.0368
B) 0.105
C) 0.185
D) 0.255

If a patient is waiting for a suitable blood donor and the probability that the selected donor will be a match is 0.2, then find the expected number of donors who will be tested till a match is found including the matched donor?

A) 6
B) 2
C) 5
D) 8