Kate Wants to Compare Two Means

question 86

Multiple Choice

Kate wants to compare two means.Her sample statistics were 1 = 22.7,s12 = 5.4,n1 = 9 and 2 =20.5,s22 = 3.6,n2 = 9 .Assuming equal variances,the pooled variance is

• A)4.5
• B)4.9
• C)5.1
• D)3.8

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