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3 years ago

Need some help on this

Mathematics

1 answer:

Law Incorporation [45]3 years ago

4 0

9514 1404 393

Answer:

a. set 1: 29 minutes; set 2: 25 minutes

b. set 1 is more challenging than set 2

Step-by-step explanation:

a. The mean is found by adding the times and dividing by the number of times. For set 1, that is ...

(2×27 +2×28 +3×29 +2×30 +33)/10 = 290/10 = 29 . . . minutes

For set 2, that is ...

(4x24 +4×25 +2×27)/10 = 250/10 = 25 . . . minutes

b. The mean of set 1 is higher, and the spread is wider, suggesting more students have more trouble with the problems of set 1. That is, ...

set 1 is more challenging than set 2

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