A news article states: the standard
deviation of heights for students at Santa Maria
High School is 0.81. A random sample of 50
students is taken, and the standard deviation of
heights of the sample is 0.96. Carlos believes the
standard deviation of heights for the school is
greater than 0.81. Complete the test writing out
each step clearly assuming the population is
normal.
1) Christian is wondering if women and men
read the same number of books on average in
November. He finds the data in the table,
assuming the populations are approximately
normal and variances are equal, at the 1%
significance level, is Christian's claim supported?
# 1, 5, 3, 7, 4, 9, 4, 6, 5, 2, 10,
book
for
Girls 7, 8, 12, 4, 2, 5, 1, 4, 3, 15, 3
#
book
for
11, 9, 8, 0, 2, 14, 11, 9, 7, 11,
Boys 6, 1, 10, 8, 9, 16, 6, 3, 9, 10