Question
please help as soon as possible
13. The standard tion on a reading test is 2.0 for third graders and 1. for sixth on rs. Using ONLY this information, we can say a. th b third graders read better than third graders c. the scores for third graders are more spread out d. the scores for sixth graders are more spread out than those of third graders spread out than those of sixth graders distribution of scores for third graders is not normal. 14, (Xi-X) equals- a. the sum of squares d. cannot determined curve 3 I5. Using the figure below. which of the following is true? Curve 2 une 16. Which of the following is true of the mean? a. The sum of the deviations around the mean is zero. b. The mean is very sensitive to extreme values. c. The sum of squares of deviations from the mean is a minmu d. Ail of the above are characteristics of the mean. 17. If a distribution is positively skewed, which of the following is truc? a. mean modemedian b. mean
Explanation / Answer
Answer:
13).
c). the scores for the third graders are more spread out than those of third gradres.
14).
c. 0
15).
c. S3 < S2 < S1
16).
d. all of the above are characteristics of the mean.
17).
d. none of the above is correct.
For positively skewed, mean > median > mode.
18).
e. 5
standard deviation = sqrt(25) =5
19).
90% of the scores are below 80.
