Question

Lock, Statistics: Unlocking the Power of Data, 2e Help System Announcements ractice Assignment Gradebook ORION gnment Chapter 2, Section 3, Exercise 106 Estimating Summary Statistics Use the dataset given below. 47, 48, 50, 51, 51, 52, 52, 54, 54, 56, 59, 59, 60, 60, 62, 63 Incorrect. (a) Without doing any calculations, estimate which of the following numbers is closest to the mean. lo SHOW HINT LINK TO TEXT x Incorrect vacy Policy © 2000-2019 John Wiley & Sons, Inc. All Rights Reserved. A Division of John Wiley & Sons, Inc.

why is this wrong?

Answer 1

Note: the answer to the part a) should be 55. may be other part answers are wrong that why it is showing it wrong. please correct others and then check.

a) Mean without calculation = 55

b) Standard deviation without calculation = 5

c)

∑x = 878

∑x² = 48566

n = 16

Mean , x̅ = Ʃx/n = 878/16 = 54.875 = 54.9

Standard deviation, s = √[(Ʃx² - (Ʃx)²/n)/(n-1)] = √[(48566-(878)²/16)/(16-1)] = 5.0712 = 5.1

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if any doubt ask me in comments.