Question

Students in a random sample of 57 students measured their handspan. The dot plots display the results for the males and females.

Answer 1

Answer:

There is a difference in mean hand span between male and female if you notice the difference between their averages.    2cm  is quite significant

female mean = 19.6 cm  and male mean = 21.6 cm

Step-by-step explanation:

a.)  There is a significant difference.

take  P( Z  < ( 19.6 - 21.6) / 1)  = P(Z < -2) = 2% probability of assuming that male and female means are the same.  too low to think like that.

b.) Differ by 2cm.  MAD=  Mean Absolute Deviation , MAD within their own data set  seem similar

C.)  The variability in hand spans among male and female are very similar, since they both have the same MAD = 1.0