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tangare [24]
3 years ago
10

A sample of 14 students was selected to estimate the average score in a given quiz. The average score in the sample is 2.14 with

standard deviation of 1.29. Find a 99% confidence interval for the average score of the student in the class
Business
1 answer:
Savatey [412]3 years ago
6 0

The average score of the student in the class at a 99% confidence lies between 1.252 and 3.028

Explanation:

Given values are

n = 14   = 2.14     σ = 1.29  z value for 99% confidence = 2.576

The mean is known one

= (z σ/√14)

=  (2.576 ×1.29÷√14)

(2.576 ×1.29÷√14)

= 2.576 × 0.345

= 0.888

 =  mean- 0.888 = 2.14  - 0.888 = 1.252

 =  mean+0.888 =  2.14 + 0.888 = 3.028

The average score of the students in the class at a 99% confidence lies between 1.252 and 3.028

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As a foreign subsidiary matures:
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The receiving department has three activities: unloading, counting goods, and inspecting. Unloading uses a forklift that is leas
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Answer:

Calculating the cost of each activity,

Unloading = $ 80,100

Counting = $ 37,500

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Explanation:

Given:

Unloading lease = $15,000 per year

Fuel for the forklift = $3,600 per year

Maintenance for the forklift = $1,500 per year

Inspection uses some special testing equipment that has depreciation of $1,200 per year

Operating cost = $750.

Receiving employees average salary = $50,000 per year

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Inspecting salary = 35% × 150,000 = 52,500

                              Unloading                 Counting                    Inspection

Equipment               15,000                                                             1,200

Fuel                           3,600

Operation cost          1,500                                                                750

Labor                       60,000                   37,500                          52,500

Total cost                 80,100                   37,500                          54,450

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