Please help in answering this question. If there is no seasonal effect on human

Question

Please help in answering this question. 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, 24 were born in winter, 36 in spring, 33 in summer, and 27 in fall. She wonders if the excess in the spring is an indication that births are not uniform throughout the year a) What is the expected number of births in each season if there is no "seasonal effect" on births? b) Compute the 2 statistic. c) How many degrees of freedom does the x2 statistic have? a) The expected number of births in each season if there is no "seasonal effect" is Type an integer or a decimal.,) b)2-O(Round to three decimal places as needed.) e) df-Type an integer or a decimal.)

Explanation / Answer

a) The expected number of births in each season=(24+36+33+27)/4

=120/4

=30

b) Chi square Statistics= summation(Observed value-expected Value)^2/expected value

= (24-30)^2+(36-30)^2+(33-30)^2+(27-30)^2/30

=36+36+9+9/30

=90/30

=3

c) Degree of freedom=4-1

=3

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