A study was conducted to evaluate a new method of teaching ...

[sc00by25]

A study was conducted to evaluate a new method of teaching medication dose calculation to nursing students. The mean score on the exam was X = 82.3 with a standard deviation of 4.6. What is the range of scores for 95.44 of the students?
 
  1. 77.786.9
  2. 73.191.5
  3. 68.596.1
  4. 70.190.5

Question 2

Which statement is true of a set of scores that is negatively skewed?
 
  1. There are more scores located at the lower end of the distribution.
  2. The scores are evenly distributed in the distribution.
  3. More scores lie close to the mean of the distribution.
  4. More scores are located at the upper end of the distribution.

[brbarasa]

Answer to Question 1

3
Rationale 1: Scores of 77.786.9 would account for 68.26 of the scores (1 SD).
Rationale 2: Scores of 73.191.5 would account for 95.44 of the scores (2 SD).
Rationale 3: Scores of 68.596.1 would account for 99.72 of the scores (3 SD).
Rationale 4: Scores of 70.190.5 do not accurately represent a specific range of scores.
Global Rationale:

Answer to Question 2

4
Rationale 1: If more scores are at the lower end of the distribution and the tail points to the right, it is positively skewed.
Rationale 2: Scores are evenly distributed in a nonskewed or normal distribution.
Rationale 3: Scores clustered around the mean would not result in a skewed distribution.
Rationale 4: In a negatively skewed distribution, more scores are at the upper end of the distribution and the tail of the distribution points to the left.
Global Rationale:

[sc00by25]

Thank you

[brbarasa]

Happy to help you