A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each:

Day Weight (ounces)
Monday 23 22 23 24
Tuesday 23 21 19 21
Wednesday 20 19 20 21
Thursday 18 19 20 19
Friday 18 20 22 20

What are the upper and lower control limits for these data?

a. UCL = 22.644 LCL = 18.556
b. UCL = 22.700 LCL = 18.500
c. UCL = 22.755 LCL = 18.642
d. UCL = 21.814 LCL = 19.300


Answers

Answer 1

Answer:

a. UCL = 22.664 LCL = 18.556

Explanation:

The sample mean for the given data is :

( 23 + 20 + 19 + 20 + 21 ) / 5 = 20.6

Upper control limit is :

Sample mean + standard deviation  

20.6 + 2  = 22.6

Lower Control Limit is :

Sample mean - Standard Deviation

20.6 - 2 = 18.6


Related Questions

Lens Junction sells lenses for $44 each and is estimating sales of 16,000 units in January and 17,000 in February. Each lens consists of 2 pounds of silicon costing $2.50 per pound, 3 oz of solution costing $3 per ounce, and 15 minutes of direct labor at a labor rate of $18 per hour. Desired inventory levels are: Jan. 31 Feb. 28 Mar. 31 Beginning inventory Finished goods 4,300 4,800 4,900 Direct materials: silicon 8,300 9,200 9,000 Direct materials: solution 11,000 12,200 12,900

Answers

Complete Question:

1. Prepare a sales budget. Lens Junction Sales Budget For the Two Months Ending February 28, 20XX January February Expected Sales (Units) Sales Price per Unit Total Sales Revenue Total

2. Prepare a production budget. Lens Junction Production Budget For the Two Months Ending February 28, 20XX January February Expected Sales Total Required Units Required Production Total

3. Prepare direct materials budget for silicon. Lens Junction For the Two Months Ending Fabrant Materials, Purinat for Silinn February Expected Sales Total Required Units Required Production Total

4.Prepare direct materials budget for silicon.

Answer:

Lens Junction

1. Lens Junction Sales Budget For the Two Months Ending February 28, 20XX

                                         January      February

Expected Sales (Units)     16,000         17,000

Sales Price per Unit           $44              $44

Total Sales Revenue     $704,000    $748,000

2. Lens Junction Production Budget For the Two Months Ending February 28, 20XX

                                              January      February

Expected Sales Total             16,000         17,000

Ending Inventory                     4,800          4,900

Required Units                     20,800         21,900

Beginning Inventory               4,300          4,800

Required Production Total   16,500          17,100

3 & 4. Lens Junction Direct Materials Budget For the Two Months Ending February

                                               January            February

                                        Silicon  Solution   Silicon   Solution

Expected Sales            32,000     48,000    34,000   51,000

Ending inventory            9,200      9,000     12,200   12,900

Total Required              41,200    57,000    46,200   63,900

Beginning inventory      8,300      11,000      9,200    12,200

Units Required            32,900    46,000    37,000    51,700

Explanation:

a) Data and Calculations:

Sales price of lenses per unit = $44

Estimated sales of lenses in January and February respectively = 16,000 and 17,000

Direct materials for each lense:

2 pounds of silicon at $2.50 per pound = $5.00

3 oz of solution at $3.00 per ounce = $9.00

Total cost of direct materials per unit = $14

15 minutes direct labor at $18 per hour = $4.50

Desired inventory levels:

Beginning inventory of finished goods:

January 4,300

February 4,800

March 4,900

Beginning inventory of direct materials:

                   Silicon  Solution

January       8,300    11,000

February    9,200   12,200

March        9,000    12,900

Straight-Line Depreciation A building acquired at the beginning of the year at a cost of $2,200,000 has an estimated residual value of $400,000 and an estimated useful life of 20 years. Determine the following: (a) The depreciable cost $fill in the blank 1 (b) The straight-line rate fill in the blank 2 % (c) The annual straight-line depreciation $fill in the blank 3

Answers

Answer:

a)

Depreciable Cost = $ 1800000

b)

Straight Line Depreciation Rate = 5%

c)

Depreciation expense per year = $90000

Explanation:

a)

The depreciable cost is the cost that qualifies for depreciation. It is calculated as,

Depreciable Cost = Cost - Salvage Value

Depreciable Cost = 2200000 - 400000

Depreciable Cost = $ 1800000

b)

The straight line depreciation method charges a constant depreciation expense every period. The rate of straight line depreciation can be calculated as follows,

Straight Line Depreciation Rate = Depreciable cost percentage / Estimated useful life

Straight Line Depreciation Rate =  100% / 20

Straight Line Depreciation Rate = 5%

c)

The annual straight line depreciation expense can be calculated as follows,

Depreciation expense per year = Depreciable cost * Straight line depreciation rate

Depreciation expense per year = 1800000 * 0.05

Depreciation expense per year = $90000

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