Question

The negative critical value for a two-tailed hypothesis testing on the mean µ at the 5%...

  1. The negative critical value for a two-tailed hypothesis testing on the mean µ at the 5% level of significance for a sample of size n = 11 (Assume σ not known) is:

  1. t0.025,10= -2.228;   B. Z0.025 = -1.96; B. Z0.05 =- 1.645; t0.05,10 = - 2.10
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Answer #1

We have to find the negative critical value for a two-tailed hypothesis testing on the mean µ at the 5% level of significance for a sample of size n = 11

We used following command in Excel and then Press Enter key

=TINV(probability,degrees of freedom)

Note that In Excel put values as it is not write When finding critical value.

We need the negative critical value for a two-tailed hypothesis that is -2.228

t distribution is symmetric  

The correct answer is  

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The answer is

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