If there is no seasonal effect on human births, we would expect equal numbers of children to be born in each season (winter, spring, summer, and fall). A student takes a census of her statistics class and finds that of the 120 students in the class,

25 were born in winter, 35 in spring, 32 in summer, and 28 in fall. She wonders if the excess in the spring is an indication that births are not uniform throughout the year. Complete parts a through e below.

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Part 1

a) If there is no seasonal effect, about how big, on average, would you expect the x2 statistic to be (whats the mean of the x2 distribution?) The expected x2 statistics is ____ (type integer or decimal)