4 points Save Answer Question 2 A random sample of weights Gn cae) of spphires i

Question

4 points Save Answer Question 2 A random sample of weights Gn cae) of spphires in ajeweler's collection is shown. Find the mean of the sample. Class Boundaris Frog umcy 0 95-295 2954.95 495-695 6 95-8.95 895-10 95 10 15 10 10 10.80 O 5.55 595 O 5.69 2 points Save Answer Question3 On a recent Saturday, a total of 1112 people visited a local library. Of these people, 266 were under age 10, 496 were aged 10-18, 189 were aged 19-30, and the rest were more than 30 years old One person is sampled at random. What is the probability that the person is less than 19 years old? 0.446 O 0.239 0762 00.685

Explanation / Answer

Solution1:

mean=5.69

OPTION D

class boundaries frequency midpoint midpoint*freq 0.95-2.95 10 1.95 19.5 2.95-4.95 15 3.95 59.25 4.95-6.95 10 5.95 59.5 6.95-8.95 10 7.95 79.5 8.95-10.95 9 9.95 89.55 Total 54 307.3 mean=(midpoint*freq)/tot freq =307.3/54 5.690741

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