PSC 3. What percentage of students earned less than a grade of 70 on the exam? 2

Question

PSC 3. What percentage of students earned less than a grade of 70 on the exam? 2 405060708090100 Score a. 14% b. 20% C. 47% d. 80% e. 93% 4. What do you think the shape of the distribution of age of death from trauma (accident, murder, suicide, drug overdose, etc.) would be when represented bya histogram? a. Symmetric-Uniform b. Skewed Left c. Skewed Right d. Symmetric-Unimodal e. Symmetric-Bimodal 5. A recent survey asked 90 students "How many hours do you spend on the computer in a typical day?. Of the 90 respondents 3 said 1 hour, 5 said 2 hours, 15 said 3 hours, 25 said 4 hours, 20 said 5 hours, 15 said 6 hours, 5 said 7 hours, 1 said 8 hours and 1 said 9 hours. What is the average (mean) number of hours spent on the computer? a. 0.5 b. 4 C. 5 d. 4.44

Explanation / Answer

Solution:-

3) The percentage of students earned less than a grade of 70 on the exam is 47%.

Total number of students = 7

Number of students earned less than a grade of 70 on exam = 15

The percentage of students earned less than a grade of 70 on the exam= 7/15 = 0.4666

The percentage of students earned less than a grade of 70 on the exam = 0.4666×100 = 47%

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