TABLE 1 shows the total number of man-days lost to sickness duri

TABLE 1 shows the total number of man-days lost to sickness duri


Asked by 5 years ago
389.5k points

1. TABLE 1 shows the total number of man-days lost to sickness during one weeks operation of a small chemical plant.

Days lost 1-3 4-6 7-9 10-12 13-15
Frequency 8 7 10 9 6

Showing all of your Working, calculate the arithmetic mean and standard deviation of the number of days lost.

2. The school of Science and Engineering at a local university regularly purchases a particular type of electrical component. 60% are purchased from company A, and 40 % are from Company B. 2% of those supplied by company A and 1% of those supplied by Company B are known to be defective. The components are identical and thoroughly mixed on receipt.
(a) Draw a tree diagram to represent the possible outcomes when a single component is selected at random.
(b) A component is selected at random.
(i) What is the probability that this component was supplied by company A and was defective?
(ii) Calculate the probability that the component was defective.
(iii) Given that the component was defective, what is the probability that it was supplied by company A?

3. Length of metai strips produced by a machine are normally distributed with mean length of 150 cm and a standard deviation of 10 cm.
Find the probability that the length of a randomly selected strip is
(a) Shorter than 165 cm.
(b) Longer than 170 cm.
(c) Between 145 cm and 155 cm.

4. The torque, T Nm, required to rotate shafts of different diameters, D mm, on a machine has been tested and recorded below.

D(mm) 6 10 14 18 21 25
T(Nm) 5.5 7.0 9.5 12.5 13.5 16.5

(a) Plot a scatter diagram of the results with diameter of the machine as the independent variable.
(b) Use the method of least squares to determine the linear regression equation that relates the torque to the diameter.
(c) Estimate the value of torque required when the diameter is 16 mm.
(d) Calculate the coefficient of correlation between these variables and comment on your prediction obtained in (c).

TABLE 1
lancer

2 Answers

Answered by 5 years ago
403.4k points

Oh Snap! This Answer is Locked

 TABLE 1 shows the total number of man-days lost to sickness duri

Thumbnail of first page

Excerpt from file: Math Tutorial 1. TABLE 1 shows the total number of man-days lost to sickness during one weeks operation of a small chemical plant. Days lost 7-9 10 12 13 15 Frequency 8 7 10 9 6 TABLE I Showing all of your Working, calculate the arithmetic mean and standard deviation of the number of days lost.

Filename: M2114.pdf

Filesize: 374.9K

Downloads: 83

Print Length: 4 Pages/Slides

Words: 795

J
Answered by 12 months ago
0 points

Oh Snap! This Answer is Locked

 TABLE 1 shows the total number of man-days lost to sickness duri

Thumbnail of first page

Excerpt from file: Runninghead:ETEXTTEAMASSIGNMENTS Week3:EtextLearningTeamAssignments ACC/400 1 ETEXTTEAMASSIGNMENTS 2 Week3:EtextLearningTeamAssignments FinancialAccounting:ToolsforBusinessDecisionMaking,4thedition Chapter13:Problem:P134A a)

Filename: ACC 400 Week 3 Team Assignment-Text Assignments.doc

Filesize: < 2 MB

Downloads: 3

Print Length: 4 Pages/Slides

Words: NA

Your Answer

Surround your text in *italics* or **bold**, to write a math equation use, for example, $x^2+2x+1=0$ or $$\beta^2-1=0$$

Use LaTeX to type formulas and markdown to format text. See example.

Sign up or Log in

  • Answer the question above my logging into the following networks
Sign in
Sign in
Sign in

Post as a guest

  • Your email will not be shared or posted anywhere on our site
  •  

Stats
Views: 1.2k
Asked: 5 years ago

Related