Mm207 Unit 2

Homework Chapter 2
1. The movie ratings by a critic: 0 stars, ½ stars, 1 star etc Discrete

2. Finish times in the boston marathon Quantitative: continuous, ratio

3. The number of daily newspaper is now 1452, and it was 2223 in 1900. Express the relative change using a percentage. Use the second given value as the reference value. Also, write a statement describing the results New value – reference value / reference value x 100%= 1452 – 2223 = -771 / 2223 x 100% = -34.6 = -35% There is a 35% decrease from 1900

3. 1451- 2212 = -761 / 2212 = -0.34 x 100% = -34%

4. the daily circulation of the largest newspaper in the country is about 1.73 million.
The daily circulation of the 3rd largest newspaper in the country is about 1.09 million.
Express the relative difference using a percentage.
Use the second given value as the reference value. Also, write a statement describing the result.

1.73 – 1.09 = .64 / 1.09 = 0.587 x 100% = 59%

5. survey of 1387 office workers, 4.7% said that they do not make personal phone calls. Find the number of respondents corresponding to the given percentage.
The number of office workers who said that they do not make personal phone calls is 65% 1387 x 4.7% (0.047) = 65%

6. in 1975 the price of gas per gallon was 55.6 cents With the 1975 price as the reference value, the gasoline price index for 1998 is 195.1 What was the cost of a gallon of gas in 1988

Index number = value / reference value x 100 Reference value = 55.6 Reference value in dollars = 55.6 / 100 = 0.556
*divide price given in cents by 100 to find the price in dollars
* value = reference value x index number / 100 Calculate the cost of a gallon of gas in 1998 1990 price = 1975 price x index number / 100 0.556 x 195.1 / 100 = 1.08

7. identify the 7 gasoline price index numbers in the following table that would