Answer:
1 is B
2 is B
3 is stream line body and fluke both help in swimming and both are independent envolved that is their ancestors don't match
Step-by-step explanation:
Answer:
I'm taking the test right now so i'll tell you the right answer after I submit my test but for now I think it's C.
Answer:
Yes. The male and female consumers differ in the amounts they spend.
Step-by-step explanation:
We can express the null and alternative hypothesis as:
It is assumed a significance level of 0.05.
The standard deviation of the difference of means is calculated as:
The test statistic is
The degrees of freedom are:
The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.
We can conclude that male and female consumers differ in the amounts they spend.