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1) Time to MRI
Researchers wish to know if they can conclude that the mean number of days between
injury and initial MRI is more than 15 days in a population presumed to be represented
by these sample data.
a) State the Null and Alternative hypotheses.
b) Define the variable of interest in your hypotheses.
c) What test statistic will you use? Write out the formula and calculate it.
d) State what the distribution of the test statistic is.
e) Let alpha be 0.05. How many tails does your test have? What is/are the critical
value(s) associated with that area below the curve?
f) What is the p value for this test?
g) What decision will you make, based on this p value?
h) What decision will you make, based on your calculated test statistic?

Sagot :

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