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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 9PPS

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Need to be solve part c in 20 minutes

The following measurements x, and x2 were made on a sample of four
genuine ten pound notes.
2.
Genuine (A)
X1
4
X2
6
1
7
11
8
Similar measurements were made on a sample of five forged ten pound
notes.
(a)
Show that the sample covariance matrix for group A is equal to
17.667 4.333
1.667
4.333
to 3 decimal places.
Given that Eg = (3.3 5.55) for the sample of forged ten
5.55
5.8
pound notes, calculate the pooled covariance matrix.
(b)
(c)
Use Box's M-test to test at the 5% significance level whether the
group covariance matrices are equal.

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