a) Is the normality requirement satisifed for the test? Explain b) At the 2% of significnace, does the p-value support the claim that the dry desnity of OSB is different to that of plywood?c) What is the p-value associared with the test? Tests of NormalityKolmogorov-Smirnov"Shapiro-WilkWood TypeStatisticdfSig.StatisticdfSig.Dry_Density Plywood.18712.200.94412.547OSB.25814.012.92214.235*. This is a lower bound of the true significance.a. Lilliefors Significance Correction Independent Samples TestLevene's Test for Equality ofVariancest-test for Equality of Means95% Confidence Interval of theDifferenceMeanStd. ErrorSig.dfSig. (2-tailed)DifferenceDifferenceLowerUpperDry_DensityEqual variances4.356.048-4.72124.000-16.570243.50981-23.81413-9.32634assumedEqual variances notassumed-4.89122.087.000-16.570243.38814-23.59520-9.54528

Given information: The output of the test for normality and 2 sample t test is given.

Answered: Is the normality requirement satisifed…

Is the normality requirement satisifed for the test? Explain b) At the 2% of significnace, does the p-value support the claim that the dry desnity of OSB is different to that of plywood?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

a) Is the normality requirement satisifed for the test? Explain

b) At the 2% of significnace, does the p-value support the claim that the dry desnity of OSB is different to that of plywood?

c) What is the p-value associared with the test?

Tests of Normality
Kolmogorov-Smirnov"
Shapiro-Wilk
Wood Type
Statistic
df
Sig.
Statistic
df
Sig.
Dry_Density Plywood
.187
12
.200
.944
12
.547
OSB
.258
14
.012
.922
14
.235
*. This is a lower bound of the true significance.
a. Lilliefors Significance Correction

Independent Samples Test
Levene's Test for Equality of
Variances
t-test for Equality of Means
95% Confidence Interval of the
Difference
Mean
Std. Error
Sig.
df
Sig. (2-tailed)
Difference
Difference
Lower
Upper
Dry_Density
Equal variances
4.356
.048
-4.721
24
.000
-16.57024
3.50981
-23.81413
-9.32634
assumed
Equal variances not
assumed
-4.891
22.087
.000
-16.57024
3.38814
-23.59520
-9.54528

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