Question

effects of fetal alcohol syndrome
you suspected that the syndrome interferes with growth
what is known? For the general population:
u0 = 160 cm and SD = 6 cm
what is known only to you?
you collected data x1; x2; : : : ; x31 with x = 147:4 cm
the conclusion may be obvious to you, but ...
you may find it dificult to convince others|hypothesis testing
will come to your rescue

Reconsider the in-class example of fetal alcohol syndrome. Assume that an unreliable measurement was detected and discarded. Now the new sample mean is x = 149.2. a) what is your new z-statistic? b) what is the precise p-value? (hint: use SAS) c) construct a 95% confidence interval for mean height. d) construct an 99% confidence interval for mean height. e) should you reject H2 : u = 160:0 cm in favor of HA : u is not = 160:0 cm at the 0.05 level?

Answer 1