Question

2.Heights of the Highest Waterfalls The heights in feet) of the 20 highest waterfalls in the world are shown here. (Note: The height of Niagara Falls is 182 feet!) below. Based on these data, what do you think of the claim that the average expenditure per pupil in the United States exceeds $10,000? a 94222 b 8988 3212 2800 2625 2540 2499 2425 2307 2151 2123 2000 1904 1841 1650 1612 1536 1388 1215 1198 1182 1170 Source: New York Times Almanac. 6,300 11847 8,319 9,344 9,870 10,460 7,491 7,552 12,568 8,632 7,552 12,568 8,632 11,057 10,454 8,109 Source: New York Times Aimanac. 3. High Temperatures The reported high temperatures (in degrees Fahrenheit) for selected world cities on an October day are shown below. Which measure of central tendency do you think best describes these data? gs of Nonliving Celebrities Forbes zine prints an annual Top-Earning Nonliving 62 72 66 79 83 61 62 85 72 64 74 71 42 38 91 66 77 90 74 63 64 68 42 Celebrities list (based on royalties and estate earnings). Find the measures of central tendency for these data anc comment on the skewness. Figures represent millions o dollars. Source: www.accuweather.com a. 68.1 b. 68 e. 42. 62. 64. 66. 72. 74 d 645

Answer 1

Solution:-

14) The student performed better on history test, because the z-score for history test is greater than z-score for mathematics.

Mathematics test

Mean = 54, S.D = 3

x = 60

By applying normal distribution:-

$z = \frac{x-\mu }{\sigma }$

z = 2.0

History test

Mean = 75, S.D = 2

x = 80

By applying normal distribution:-

$z = \frac{x-\mu }{\sigma }$

z = 2.5