Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Please help me with these. Thank you. f1. In a time motion study, it was found out that the time required by workers to complete

image text in transcribedimage text in transcribedimage text in transcribed

Please help me with these. Thank you.

image text in transcribedimage text in transcribedimage text in transcribedimage text in transcribed
\f1. In a time motion study, it was found out that the time required by workers to complete a certain manual operation was normally distributed with a mean of 26.6 minutes with a standard deviation of 3 minutes. A group of 25 workers was randomly selected to receive a special training for two weeks. After the training, it was found that their average time to finish the operation was 23 minutes. Can it be concluded that the special training speeds up the operation? Use 0.05 level of significance.2. An insurance company claims that the mean cost to process a claim is $60. An industry comparison showed this amount to be larger than most other insurance companies, so the company instituted cost-cutting measures. To evaluate the effect of the cost-cutting measures, the supervisor selected a random sample of 26 claims processed last month and recorded the cost to process each claim. The sample information is reported below (in $). 45 49 62 40 43 61 48 53 67 63 78 64 48 54 51 56 63 69 58 51 58 59 56 57 38 76 At the 0.05 significance level, is it reasonable to conclude that the mean cost to process a claim is now less than $60?3. A new papaya soap manufacturer claims that 80% of women who used the soap observed skin whitening within two weeks. One of their competitors makes a random survey if the claim is true. The survey results in 6 out of 10 women observed skin whitening within two weeks. With a=5%, is the soap manufacturer's claim true

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

Discrete Structures, Logic, And Computability

Authors: James L Hein

3rd Edition

1449615279, 9781449615277

More Books

Students also viewed these Mathematics questions

Question

Always show respect for the other person or persons.

Answered: 1 week ago

Question

Self-awareness is linked to the businesss results.

Answered: 1 week ago