3. Human births, again For the births in Exercise 1, a) If there is no seasonal effect, about how big, on average,
would you expect the x? statistic to be (what is the mean of
the x? distribution)?
b) Does the statistic you computed in Exercise 1 seem large in
comparison to this mean? Explain briefly.
c) What does that say about the null hypothesis?
d) Find the a = 0.05 critical value for the x? distribution with
the appropriate number of df.
e) Using the critical value, what do you conclude about the null
hypothesis at a = 0.05?
4 Bank cards again for the customers in Fyaroico