A microwave manufacturing company has just switched to a new automated production system. Unfortunately, the new machinery has been frequently failing and requiring repairs and service. Historically, the company has been able to provide its customers with a completion time of 6 days or less. To analyze whether the completion time has increased, the production manager took a sample of 36 jobs and found that the sample mean completion time was 6.5 days with a sample standard deviation of 1.5 days. At a significance level of .10 using the critical value rule, we can show that the completion time has increased. Required:
Indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one- tailed or two-tailed.

Answer

Kindly check explanation

Explanation:

Given the following :

Sample mean (m) = 6.5

Samole standard deviation (s) = 1.5

α = 0.10

Sample size (n) = 36

μ = 6

Null : μ ≤ 6

Alternative : μ > 6

Decision region:

If Tstatistic > tα, n - 1 ; reject Null

One tailed test (right tail)

Tstatistic (t) :

(m - μ) / s/√n

(6.5 - 6) / 1.5/√36

0.5 / 0.25

= 2

tα, n - 1 = t0.1,35 ; from t table ; = 1.306

If Tstatistic > tα, n - 1 ; reject Null

2 > 1.306 ; hence reject Null

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1   all nations face the problem of scarcity because there are limited resources and unlimited wants. nations do not have enough factors of production to produce everything that their population wants. entrepreneurial resources initiate businesses to make new goods and services; labor resources produce goods and services.

2 there are four factors of production: natural resources, labor resources, capital resources, and entrepreneurial resources. natural resources are raw materials from nature that are used to produce goods. trees, water, and grains are natural resources. some natural resources, such as wheat and cattle, are renewable

3 wants

things that you do not need to have in order to survive, but would like to have

needs

things that you must have in order to survive

goods

physical products

services

tasks that a business perform for customers

resources

items that people can use to make or obtain what they need or want

determine

to settle or decide by choice of alternatives or possiblities

4 i really dont know