Question

QUEST 12.5 points Provide an appropriate response. Find the standardized test statistic t for a sample with n = 15, x = 7.2, s = 0.8, and a = 0.05 if Hou 56.9. Round your answer to three decimal places. O 1.452 O 1.728 O 1.631 O 1.312 QUEST 12.5 points Save Answer Provide an appropriate response. Find the standardized test statistic t for a sample with n = 10, x = 16.5, S = 1.3, and a=0.05 if Hou 217.4. Round your answer to three decimal places. 0 -2.189 0 -3.010 0 -3.186 -2.617 QUESTI 10 points Save Answer How does the shape of the t- distribution change as the sample size increases? It becomes broader. It becomes skewed. It becomes flatter It becomes mc

Answer 1

Q1) The Test Statistic

$t = \frac{\bar{x}-\mu }{\frac{s}{\sqrt{n}}} = \frac{7.2-6.9}{\frac{0.8}{\sqrt{15}}} = 1.452$

Therefore Option 1.

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Q2) The Test Statistic

T-9 t=- 16.5-17.4 -=-2.189

Therefore Option 1.

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Q3) As sample size increases it approaches the normal distribution. i,e it becomes narrower. (cannot see the last option, but its definitely not the first 3 options.)