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Statıstıcs Iı Deneme Sınavı Sorusu #1051299
Statıstıcs Iı Deneme Sınavı Sorusu #1051299
For a statistical test following a normal distribution, the alternative hypothesis is that the mean equals to a hundred and the standard deviation is s = 20. A sample of 25 observations is randomly selected and the sample average is equal to 102. What is the test statistic equal to?
|
0.35 |
|
0.40 |
|
0.45 |
|
0.5 |
|
0.55 |
Yanıt Açıklaması:
The observation is equal to 25 which is less than 30, so we use this formula to calculate the test statistics: t = (x -µ)/(s / (n)1/2). Here x=102, µ=100, s=20, n=25 this yields to t = (102 -100)/(20 / (25)1/2) which is equal to 1/2=0.5
The answer is D.
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