random sample of exam scores. The sample has a mean of 488 and a standard deviation of 73. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 105, and it is from a non-normally distributed population with a known standard deviation of 78. O== 0 0 O It is unclear which test statistic to use. t = (b) The sample has size 13, and it is from a normally distributed population with an unknown standard deviation. O== Ot= O It is unclear which test statistic to use. 圖8民□图〗

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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We want to conduct a hypothesis test of the claim that the population mean score on a nationwide examination in biology is different from 478. So, we choose a
random sample of exam scores. The sample has a mean of 488 and a standard deviation of 73.
For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic.
Round your answers to two decimal places.
(a) The sample has size 105, and it is from a non-normally distributed population with a known standard deviation of 78.
O==
-0
Ot= 0
O It is unclear which test statistic to use.
(b) The sample has size 13, and it is from a normally distributed population with an unknown standard deviation.
-0
O==
t =
O
O It is unclear which test statistic to use.
X
oo
Transcribed Image Text:We want to conduct a hypothesis test of the claim that the population mean score on a nationwide examination in biology is different from 478. So, we choose a random sample of exam scores. The sample has a mean of 488 and a standard deviation of 73. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 105, and it is from a non-normally distributed population with a known standard deviation of 78. O== -0 Ot= 0 O It is unclear which test statistic to use. (b) The sample has size 13, and it is from a normally distributed population with an unknown standard deviation. -0 O== t = O O It is unclear which test statistic to use. X oo
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