Question

14. The stem and leaf diagram below shows exam grades of 69 statistics students. The stem is the first digit of a student's score and the leaf is the second digit. Stem Leaves 5 778 6 1122334 6 555666777799999 7 001123333344 7 5555666777779 8 00222244 8 5567788999 9 1 What is the third quartile of grades on this exam? a. 70 b. 75 c. 80 d. 85 15. According to the empirical rule, the bell or mound shaped distribution will have approximately 68% of the data within what number of standard deviations of the mean? a. one standard deviation b. two standard deviation c. three standard deviation d. None of the above 16. A researcher is studying students in college in Kuwait. She takes a sample of 400 students from 5 colleges. The average age of all college students in Kuwait is: a. a statistic. b. a parameter. c. the median. d. population. 17. Half of the observations in a data set are greater than the a. Mean b. Median c. Mode d. None of the above 18. Which of the following statements is correct? a. The range is a measure of central tendency. b. The median is a measure of dispersion. c. For a symmetric distribution, the mean is equal to the median. d. For a skewed distribution, the variance is a negative number. 7

          14. The stem and leaf diagram below shows exam grades of 69 statistics students. The stem is the
first digit of a student's score and the leaf is the second digit.
Stem Leaves
5 778
6 1122334
6 555666777799999
7 001123333344
7 5555666777779
8 00222244
8 5567788999
9 1
What is the third quartile of grades on this exam?
a. 70
b. 75
c. 80
d. 85
15. According to the empirical rule, the bell or mound shaped distribution will have
approximately 68% of the data within what number of standard deviations of the mean?
a. one standard deviation
b. two standard deviation
c. three standard deviation
d. None of the above
16. A researcher is studying students in college in Kuwait. She takes a sample of 400 students from 5
colleges. The average age of all college students in Kuwait is:
a. a statistic.
b. a parameter.
c. the median.
d. population.
17. Half of the observations in a data set are greater than the
a. Mean
b. Median
c. Mode
d. None of the above
18. Which of the following statements is correct?
a. The range is a measure of central tendency.
b. The median is a measure of dispersion.
c. For a symmetric distribution, the mean is equal to the median.
d. For a skewed distribution, the variance is a negative number.
7

14. The stem and leaf diagram below shows exam grades of 69 statistics students. The stem is the
first digit of a student's score and the leaf is the second digit.
Stem Leaves
5 778
6 1122334
6 555666777799999
7 001123333344
7 5555666777779
8 00222244
8 5567788999
9 1
What is the third quartile of grades on this exam?
a. 70
b. 75
c. 80
d. 85
15. According to the empirical rule, the bell or mound shaped distribution will have
approximately 68% of the data within what number of standard deviations of the mean?
a. one standard deviation
b. two standard deviation
c. three standard deviation
d. None of the above
16. A researcher is studying students in college in Kuwait. She takes a sample of 400 students from 5
colleges. The average age of all college students in Kuwait is:
a. a statistic.
b. a parameter.
c. the median.
d. population.
17. Half of the observations in a data set are greater than the
a. Mean
b. Median
c. Mode
d. None of the above
18. Which of the following statements is correct?
a. The range is a measure of central tendency.
b. The median is a measure of dispersion.
c. For a symmetric distribution, the mean is equal to the median.
d. For a skewed distribution, the variance is a negative number.
7

Added by Blake A.

Question

Please give Ace some feedback