Hi all pls help me with my coursework.Thx a lot n God Bless u 2day?

Question

Question 1


1.Discuss the different methods of data collection.
(20 marks)

2.The ages and distances covered were recorded for 7 cars owned by a company:

Age (years):5163432
Distances:48166858402842
Covered (000km)

(a)Calculate the regression line of distances on age of cars.
(5 marks)

(b)Plot the scatter diagram and the regression line on a graph paper.
(10 marks)

(c)Calculate the product moment correlation coefficient.
(5 marks)

3(a)What is meant by independent and dependent events?
(4 marks)
(b)Name an event that has probability equal to zero.
(1 mark)

(c)Write down the sample space of a family of three children.
(5 marks)
(Total : 50 marks)

Answer 1

Different method of Data Collection

Activity Logs/Skill Sheets Written documentation of participant's attendance, achievement or acquisition of skills Good for what and how many questions

Document review Review of written documents such as performance ratings, program logs, tally sheets, and other existing indicators Good for what and how many questions

Focus groups Moderated discussions on a particular topic or issue Good for what, how, and why questions
I
nterviews Data collection through oral conversations Good for what and why questions

Observation Watching people engaged in activities and recording what occurs Good for how, what, and how many questions

Questionnaires Written responses to clearly defined questions Good for what and how many questions.

Question 2A

The Pearson Product Moment Correlation Coefficient is the most widely used measure of correlation or association. It is named after Karl Pearson who developed the correlational method to do agricultural research. The product moment part of the name comes from the way in which it is calculated, by summing up the products of the deviations of the scores from the mean.

The symbol for the correlation coefficient is lower case r, and it is described in our textbook as the sum of the product of the Z-scores for the two variables divided by the number of scores.


If we substitute the formulas for the Z-scores into this formula we get the following formula for the Pearson Product Moment Correlation Coefficient, which we will use as a definitional formula.


The numerator of this formula says that we sum up the products of the deviations of a subject's X score from the mean of the Xs and the deviation of the subject's Y score from the mean of the Ys. This summation of the product of the deviation scores is divided by the number of subjects times the standard deviation of the X variable times the standard deviation of the Y variable.

Let's calculate the correlation between Reading (X) and Spelling (Y) for the 10 students whose scores appeared in Table 3. There is a fair amount of calculation required as you can see from the table below. First we have to sum up the X values (55) and then divide this number by the number of subjects (10) to find the mean for the X values (5.5). Then we have to do the same thing with the Y values to find their mean (10.3).

Correlation Between Reading and Spelling for Data in Table 3 Using the Definitional Formula Student Reading (X) Spelling (Y)
1 3 11 -2.5 0.7 -1.75
2 7 1 1.5 -9.3 -13.95
3 2 19 -3.5 8.7 -30.45
4 9 5 3.5 -5.3 -18.55
5 8 17 2.5 6.7 16.75
6 4 3 -1.5 -7.3 10.95
7 1 15 -4.5 4.7 -21.15
8 10 9 4.5 -1.3 -5.85
9 6 15 0.5 4.7 2.35
10 5 8 -0.5 -2.3 1.15

Sum 55 103 0.0 0.0 -60.5
Mean 5.5 10.3



Standard Deviation 2.872 5.832




Then we have to take each X score and subtract the mean from it to find the X deviation score. We can see that subject 1's X deviation score is -2.5, subject 2's X deviation score is 1.5 etc. We could make another column of the squares of the X deviation scores and sum up this column to use to calculate the standard deviation of X using the definitional formula for the standard deviation of a population as we did in Lesson 6.

We can then find each subject's Y-deviation score. Subject 1's Y deviation score is 0.7 (11 - 10.3) and subject 2's Y deviation score is -9.3 (1 - 10.3). We could then add another column to square the Y-deviation scores and use the sum of this column to find the standard deviation for the Y scores.

We can then fill in the last column in which we multiply each subject's X deviation score times the same subject's Y deviation score. For subject 1 this is -1.75 (-2.5 times 0.7) and for subject 2 this is -13.95 (1.5 times -9.3). Finally if we sum up the last column (X deviation score times Y deviation score) we can use that quantity (-60.5), along with the standard deviations of the two variables and N, the number of subjects, to calculate the correlation coefficient.

Answer 2

Lady Eagle, I have had two dreams that I consider as being from GOD in my lifetime. My grandmother died when I was about 8 years old and I had the most wonderful night-vision of an angel that visited me a short time after her death. It was very beautiful and I felt like she (my grandmother) was there with me at that time. When my wife and I were dating I had a recurring dream of an auto accident. I kept seeing a car heading for a stone wall as if I was driving. I described it to Karen and she played it off. Within a couple of weeks though she hit that wall and destroyed her car. She was hospitalized for a short time and I could not believe the wall when I saw it later. It was the very same wall that I had seen in my dream/nightmare. Thanks, Eds ~~~ Ladyeagle, This is a wonderful question and I am sorry that some have been so disrespectful of your personal beliefs. Have a great evening and a wonderful week! Thank You, Eds ~~~ Fmckin1 & OlCheif, I always enjoy and respect what you have to say. Thank YOU BOTH for answering this question. I really appreciate what I read from many here but yours were just what I needed to hear this evening. Love, Eds ~~~ .

Answer 3

On two accounts I shall refrain from offering you any help.

First, I believe questions should be written in standard English. The question as written indicates a lazy attitude.

Second, it appears you have no idea on how to approach any of the THREE given topics and you are seeking someone else to complete your work for you. I would suggest you study a good textbook.

Nil Sine Labore.

Answer 4

3b could be anything which didn't happen yesterday having happened. e.g me winning the lottery last week.

Answer 5

you deserve to be bulyied