Question 1183485
This is a one sample t-test assuming normality and ability to use the sd as an unbiased estimator of the population sd.
Ho: mean is >=2.5
Ha: mean is < 2.5
alpha=0.05 p{reject Ho|Ho true}
test is a t (df=24)
critical value is t < 1.711
t=(x bar-mean)/s/sqrt(n)
=-0.7/1.2/sqrt(25)
=-3.5/1.2
=-2.92
reject Ho. Conclude that women with ovarian cancer have fewer children.
p-value=0.004