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H0:μ=11.8H0:μ=11.8 H1:μ<11.8H1:μ<11.8 Your sample consists of 306 subjects, with a mean of 11.5 and standard deviation...

H0:μ=11.8H0:μ=11.8
H1:μ<11.8H1:μ<11.8

Your sample consists of 306 subjects, with a mean of 11.5 and standard deviation of 4.72.

Calculate the test statistic, rounded to 2 decimal places.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

this is the left tailed test .  

The null and alternative hypothesis is ,

H0 :   = 11.8

Ha : < 11.8

Test statistic = z

= ( - ) / / n

= (11.5-11.8) / 4.72/ 306

= -1.11

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