Question

Scores on the test in a statistics class are as follows.   55 26 75 52 80 85 80 99 90 60 86 92 40 74 72 55 87 70 85 100  

a. Calculate the 25th, 50th, and 75th percentiles. Use Excel quartile.exc func tion. Round your answers to 2 decimal places.    

b-1. Calculate the interquartile range. Show work. Round your final answers to 2 decimal places.  

b-2. Are there any outliers? Show work. Justify your selection.  

Yes

No

c. Is the distribution symmetric? Show work. Justify your selection.  

No. The distribution seems negatively skewed.

No. The distribution seems positively skewed.

Yes. The distribution is symmetric.

Answer 1