1. Which scale of measurement is used when ‘temperature’ of a place is measured?
ID: 2922409 • Letter: 1
Question
1. Which scale of measurement is used when ‘temperature’ of a place is measured?
Answer:
2.To represent daily production of oil one should use a histogram. This statement is -
Answer: True / False.
What is the name of the graph that is obtained by connecting the midpoints of the tops of the rectangles in the histogram?
Answer:
The marks of a student on six different courses are 84, 91, 72, 68, 87, and 78. Find the arithmetic mean of his marks?
Answer:
5. In a company of 80 employees, 50 earn 10,000 Dirhams per month, 20 earn 13,000 per month, and rest earn 15,000 Dirhams per month. Determine the average income of the employees in the company.
Answer:
There are four car companies in a city having 15, 20, 10, and 18 salespersons respectively. If they sold 160, 140, 150, and 145 cars respectively what is the average performance (in sales) of the salespersons?
Answer:
7.In the last national holiday, the number of ATM transactions at Ajman were: 35, 49, 225, 50, 30, 65, 40, 55, 52, 76, 48, 325, 47, 32, and 60. Find the median number of transactions.
Answer:
8. On the basis of the data recorded in the above question, the concerned bank wants to know the typical number of ATM transactions in a holiday – which measure of central tendency would you suggest and why?
Answer:
9. A shoe shop deals in 8 different sizes of shoes – the sizes are 4, 5, 6, 7, 8, 9, 10, and 11. During the last shopping festival, it sold 53, 46, 50, 49, 52, 53, 44, and 55 pairs of shoes of the above sizes respectively. Determine the modal shoe size.
Answer:
10.In a candy shop various sizes of candy packets are sold. The largest one is 450 grams and the smallest one is 250 grams. What is the range of candy packets?
Answer:
11.If the mean level of income in Abu Dhabi is 40,000 Dirhams, median income is 35,000 Dirhams, and standard deviation is 7,500 Dirhams find out the coefficient of skewness. Is the income level positively skewed or negatively skewed?
Answer:
12.A television manufacturer has two types of television sets: Plasma and LED televisions. The mean lifetime of plasma TV is 1495 months and LED TV is 1875 months, and standard deviations of lifetime for plasma TV is 280 months and for LED TV is 310 months. A) Calculate the coefficient of variation and B) Find out which TV has greater relative variability/dispersion in lifetime?
Answer:
Explanation / Answer
(According to Chegg policy, only four subquestions will be answered. Please post the remaining in another question)
1. Which scale of measurement is used when ‘temperature’ of a place is measured?
Answer: Celsius
Note : There is an alternate scale of measurement - Fahrenheit.
2.To represent daily production of oil one should use a histogram. This statement is -
Answer: True.
(Note : The question is ambigious. A histogram CAN be used but there are other plots that can serve the same purpose)
3. What is the name of the graph that is obtained by connecting the midpoints of the tops of the rectangles in the histogram?
Answer:Frequency polygons.
(Note: Some call them frequency diagrams.
4. The marks of a student on six different courses are 84, 91, 72, 68, 87, and 78. Find the arithmetic mean of his marks?
Arithmetic mean is (84 + 91 + 72 + 68 + 87 + 78) / 6 = 80.
Answer:80.
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