Statıstıcs Iı Deneme Sınavı Sorusu #952675
In a production line, the mean weight of the products should be 450 grams and the standard deviation of the weight variable is ? = 25. It is known that the distribution of the weights of the packages follow a normal distribution. A sample of 32 observations is randomly selected from the production line in the afternoon and the sample average is found as of 448 grams.The significance level ? = 0.05 for this problem.
If you follow the five step hypothesis testing procedure, what is the alternative hypothesis for the situation given above ?
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The mean weight of the packages is 450 grams. |
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The mean weight of the packages is 448 grams. |
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the mean weight of the packages is not 450 grams. |
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The mean weight of the packages is less than 450 grams. |
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The mean weight of the packages is more than 450 grams. |
The null hypothesis (H0 ) is “the mean weight of the packages is 450 grams” and the alternative hypothesis (H1 ) is “the mean weight of the packages is less than 450 grams”. Here the alternative hypothesis is formed as a left tailed test because the given problem considers the weight of the packages than 450 grams.
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