Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

statistics QUESTION ONE (30 MARKS) 2.1 1.1. A manufacturer of computer chips claims that less than 10% of his products are defective. When 1,000 chips

statistics

image text in transcribed
QUESTION ONE (30 MARKS) 2.1 1.1. A manufacturer of computer chips claims that less than 10% of his products are defective. When 1,000 chips were drawn from a large production, 7.5% were found to be defective. a) What is the population of interest? (2) b) What is the sample? (2) c) What is the parameter? (2) d) What is the statistic? (2) e) Does the value 10% refer to the parameter or to the statistic? (2) f) Is the value 7.5% a parameter or a statistic? (2) g) Explain briefly how the statistic can be used to make inferences about the parameter to test the claim. (2) 1.2 Briefly describe the difference between descriptive statistics and inferential statistics (6) 1.3. If it is estimated that 30% of all students who fall under the Business and Management Sciences Faculty at Richfield have a valid driver's license. What is the probability that in a sample of 10 students: 1.3.1. Exactly 4 have a valid driver's license? (3) 1.3.2. At least 2 have a valid driver's license? (3) 1.3.3. More than 9 have a valid driver's license? (4) QUESTION TWO (30 MARKS) 2.A batch of 5000 electric lamps has a mean life of 1000 hours and a standard deviation of 75 hours. Assuming a normal distribution: 2.1. How many lamps will fail before 900 hours? (10) 2.2. How many lamps will fail between 950 and 1000 hours? (10) 2.3. And given the same mean life, what would the standard deviation have to be to ensure that not more than 20%% of lamps fail before 916 hours

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Trigonometry

Authors: David M Kennedy, James Stewart, Lothar Redlin, Saleem Watson

2nd Edition

1285226089, 9781285226088

More Books

Students also viewed these Mathematics questions

Question

1. Background knowledge of the subject and

Answered: 1 week ago