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Question 1: The t distribution is applicable whenever
a) the sample is considered large (n ≥ 30).
b) the population is normal and the sample standard deviation is used to estimate the population standard deviation
c) n ≥ 100
d) n ≥ 1000
Question 2: When the p-value is used for hypothesis testing, the null hypothesis is rejected if
a) p-value < a
b) a < p-value
c) p-value > a
d) p-value = a
The summation sign is usually represented by:
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