15. Proportion and percentage Aa Aa A statistics content developer at Aplia want
ID: 3304705 • Letter: 1
Question
15. Proportion and percentage Aa Aa A statistics content developer at Aplia wanted to know whether study skills are related to memory quality. She invited student volunteers to perform an online memory task. The students saw a list of 60 words and were then asked to recognize a list of five brand-new words that are completely unrelated to words that were on the original list. Students were also asked to provide their GPA:s Consider the following data set, which was collected from student volunteers in 2009. The table gives the frequency for five GPA intervals. Use the dropdown menus to complete the table by filling in the missing values for the proportions and percentages. GPA Interval f Proportion Percentage 44% 3.50-3.9944 0.44 3.00-3.49 39 2.50-2.99 12 2.00-2.49 3 1.50-1.99 3 1 0.03 3% 0.03 3% Note: Although there is a convention to use 10 intervals, this problem has 5 intervals for simplicityExplanation / Answer
GPA Interval f Proportion Percentage
3.50 - 3.99 44 0.44 44%
3.00 - 3.49 39 0.39 39%
2.50 - 2.99 12 0.12 12%
2.00 - 2.49 3 0.03 3%
1.50 - 1.99 3 0.03 3%
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Total 101 1.00 100%
EXPLANATION:
Proportion for 2.50 - 2.99 is got by dividing the frequency 12 by Total frequency 101 as 0.12. Percentage is obtained by multiplying this by 100. Similarly for 2.50 - 299.
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