Two sample t test for equal means
of two groups
In a randomly controlled trial
conducted with children suffering from croup, 46 randomly selected children
were treated with ow humidity while another group of randomly selected children
were treated with high humidity. Using a Wesley Croup test score, the low
humidity group had a mean score of 0.98 with a standard deviation of 122, while
the high humidity group had a mean score of 1.09 with a standard deviation of
1.11. The claim hypotheses at the 0.05 level to test the claim.
a) Correctly state the hypotheses
and label the claim
b) Draw a diagram correctly
showing the sampling distribution
c) Calculate the test statistics
d) Give the p value
e) Tell if you reject/fail to
reject the null hypothesis
f) In plain English what can be
said of the claim.
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