W1 One and Two Tail Tests Levels of Significance

# W1 One and Two Tail Tests Levels of Significance - standard...

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One and Two Tailed Tests at Levels of Significance As you have seen in the Week One readings, there are different levels of significance we can choose in hypothesis testing. The level of significance determines where the rejection region begins to fail the hypothesis. The beginning of this rejection region is known as the critical value. In this course we will mainly be using the levels of significance (ls) of 0.05 and 0.01, though others may appear in the exercises too. When we use a level of significance of 0.05, we are expecting that 95% (95% + 5% = 100% of the normal distribution) of all our samples are within 2
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Unformatted text preview: standard deviations of the population mean. When we test a sample, such as a z test statistic , that z value is a measure of standard deviation. Here are the critical values for 0.05 and 0.01 for one and two tail tests for z ....keep these handy since they will be useful in answering some parts of the hypothesis testing process. Two-tailed Test Level of Significance Rejection Begins At 0.05 +/- 1.96 Level of Significance Rejection Begins At 0.01 +/- 2.58 One Tailed Test Level of Significance Rejection Begins At 0.05 + or – 1.65 Level of Significance Rejection Begins At 0.01 + or – 2.33...
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