- The Following Data Represent The Amount Of Time In Minutes A Random Sample Of Eight Students Took To Complete The Onli 1 (76.27 KiB) Viewed 90 times
A professor has recorded exam grades for 10 students in his class, but one of the grades is no longer readable. If the mean score on the exam was 82 and the mean of the 9 readable scores is 85, what is the value of the unreadable score? The value of the unreadable score is
Aman surveyed a sample of 36 high school students and asked, "How many days in the past week have you consumed an alcoholic beverage?" The results of the survey are shown to the right. Use these results to answer parts (a) through (f). 1 0 0 0 0 0 0 0 0 4 ) 5 1 0 1 1 1 2 0 0 1 0 1 1 1 0 0 0 1 3 1 1 0 1 0 1 2 2 (a) Is this data discrete or continuous? Continuous Discrete (b) Draw a histogram of the data and describe its shape. Choose the histogram below that correctly depicts the given data. O A. ов. o C. D. Frequency 20- 15- 104 Frequency 20- 15- 10- 5- OLIITTI 0 1 2 3 4 5 Number of drinks 20- 15- 10- Frequency 20- 15- 10- Frequency 5- 0 1 2 3 4 5 Number of Drinks 0- 0 1 2 3 4 5 Number of Drinks 0 0 1 2 3 4 5 Number of Drinks
Describe the shape of the distribution. Choose the correct answer below. O A. The distribution is skewed right. OB. The distribution is symmetric. O c. The distribution is skewed left. (c) Based on the shape of the histogram, do you expect the mean to be more than, equal to, or less than the median? O A. The mean should be roughly equal to the median. OB. The mean should be substantially smaller than the median. O c. The mean should be substantially larger than the median.
(d) Compute the mean and median. What does this tell you? The mean is (Type an integer or decimal rounded to two decimal places as needed.) The median is (Type an integer or decimal rounded to two decimal places as needed.) What do the computed mean and median tell you? Fill in the blanks below. (Use a 25% difference as the criterion for a "substantial" difference between the mean and median.) The prediction was because the mean the median in this distribution. (e) Determine the mode. The mode is (Type an integer or decimal rounded to two decimal places as needed.) (f) Do you believe that the survey suffers from bias? If so, what type and why? O A. Yes, the survey suffers from sampling bias because the number of male and female students surveyed was the same. O B. No, the survey does not suffer from bias because it was administered randomly and the question asked is in balanced form. O C. Yes, the survey suffers from sampling bias because the number of male and female students surveyed was not the same. OD. Yes, the survey suffers from response bias because it would be difficult to achieve truthful responses to this type of question unless the identity of the respondents is anonymous.