Looking for answers? Westonci.ca is your go-to Q&A platform, offering quick, trustworthy responses from a community of experts. Our Q&A platform provides quick and trustworthy answers to your questions from experienced professionals in different areas of expertise. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

(12 marks)

Table 2.2: Scores of candidates

\begin{tabular}{|c|c|c|c|c|c|c|}
\hline
Marks (6) & [tex]$1-10$[/tex] & [tex]$11-20$[/tex] & [tex]$21-30$[/tex] & [tex]$31-40$[/tex] & [tex]$41-50$[/tex] & [tex]$51-60$[/tex] \\
\hline
Frequency & 8 & 36 & 38 & 30 & 15 & 5 \\
\hline
\end{tabular}

(a) From Table 2.2, calculate, correct to one decimal place, the:
1. Mean score
2. Median score
3. Modal score


Sagot :

### Solution:
Let's calculate the different statistical measures (mean score, median score, and modal score) from the given data.

#### (i) Mean Score:
The mean score is the average of all the scores. To find it, add all the scores together and then divide by the number of scores.

Scores Provided: 36, 38, 30, 15, 5

1. Calculate the sum of the scores:
[tex]\[ 36 + 38 + 30 + 15 + 5 = 124 \][/tex]

2. Divide the sum by the number of scores (which is 5 in this case):
[tex]\[ \text{Mean score} = \frac{124}{5} = 24.8 \][/tex]

So, the mean score, correct to one decimal place, is 24.8.

#### (ii) Median Score:
The median score is the middle score when all the scores are arranged in ascending order.

1. First, sort the scores in ascending order:
[tex]\[ 5, 15, 30, 36, 38 \][/tex]

2. Since there is an odd number of scores (5 scores), the median is the middle score:
[tex]\[ \text{Median score} = 30 \][/tex]

So, the median score is 30.

#### (iii) Modal Score:
The modal score is the score that appears most frequently in the data set.

1. Count the frequency of each score:
- 36 appears 1 time
- 38 appears 1 time
- 30 appears 1 time
- 15 appears 1 time
- 5 appears 1 time

2. Determine the score with the highest frequency:
- Since each score appears only once, we check the highest individual score.

The modal score, in this case, is the highest unique score, which is 36.

### Summary of Calculated Scores:
- Mean score: 24.8
- Median score: 30
- Modal score: 36
Thank you for your visit. We're committed to providing you with the best information available. Return anytime for more. We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. Find reliable answers at Westonci.ca. Visit us again for the latest updates and expert advice.