I hope this helps you
Kaitlyn gave 1/2 of her candy bar to arianna. arianna gave 1/3 of the candy she got from kaitlyn to cameron. what fraction of a
1 answer:
You might be interested in
Answer:
The p-value here is 0.0061, which is very small and we have evidence that the girls' mean is higher than the boys' mean.
Step-by-step explanation:
We suppose that the two samples are independent and normally distributed with equal variances. Let be the mean number of ring tones for girls, and
the mean number of ring tones for boys.
We want to test vs
(upper-tail alternative).
The test statistic is
T =
where
.
For this case, ,
,
,
,
.
and the observed value is
t = .
We can compute the p-value as P(T > 2.6309) where T has a t distribution with 20 + 20 - 2 = 38 degrees of freedom, so, the p-value is 0.0061. Because the p-value is very small, we can reject the null hypothesis for instance, at the significance level of 0.05.