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Provide an example of the following: (a) A research problem appropriate for a non-directional test using...

Provide an example of the following: (a) A research problem appropriate for a non-directional test using the one-sample z-statistic. (b) A research problem appropriate for a directional test using the one-sample t-statistic.

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Answer #1

Non directional single sample Z test : there are 428 green peas and 150 yellow peas , use a 0.05 significance level to test the claim that that the proportion of yellow peas is equal to 1/4

one sample t test :coca-cola company claim that mean volume of soda in there bottle is more than 12 oz. As a researcher you want to check this claim , you took sample of 39 cans of soda and found that mean is 12.11 oz with a sample standard deviation of 0.28 oz. test the coca-cola claim at significance level of 0.01

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