Scale Factor

Q.

Read the bar graph (Fig 3.4) which shows the number of books sold by a bookstore during five consecutive years and answer the following questions:

(i) About how many books were sold in 1989? 1990? 1992?

(ii) In which years were fewer than 250 books sold?

Q.
Based on the above pictograph and the scaling factor, which of these statement(s) is true?

1. 50 houses were sold in January.
2. The highest number of houses were sold in a month is 5.
3. 60 more houses more were sold in February than in March.
4. The total number of houses sold in the 3 months is 330.

Q. Nancy and Monica participated in a test series from January to September. Their marks are plotted on a line graph. What is the average difference between the marks obtained by them during the entire test series?

1. 16.33
2. 18.77
3. 16.50
4. 17.77

Q. Choose the correct formula of the inter-quartile range:

1. Lower quartile $-$ Upper quartile
2. Upper quartile $-$ Lower quartile
3. Upper quartile $+$ Lower quartile
4. $2\times$ Median

Q. The daily rainfall data of a week is shown. What is the total rainfall on Friday, Saturday and Sunday?
(Note: 1 drop = 4 inches)

1. 80

Q. The daily rainfall data of a week is shown. What is the total rainfall on Friday, Saturday and Sunday?
(Note: 1 drop = 4 inches)

1. 56 inches
2. 68 inches
3. 80 inches
4. 64 inches