Please help, I'm timed!

1)A November 2008 Gallup Poll asked a sample of Americans 18 years old or older whether they would like to lose weight, stay the same, or gain weight. In all, 50% of the sample said that they would like to lose weight. Gallup announced the polls margin of error for 95% confidence as 3 percentage points. Which of the following sources of error are included in the margin of error?

a)A different sample would likely produce different numbers

b)Some people whose numbers were chosen never answered the phone in several calls

c)Some people did not answer truthfully on the phone

d)The poll dialed telephone numbers at random and so missed all people without phones

2)Which of the following is correct?

a)If the difference is biologically important, the p value is < 0.0001

b)As the standard deviation increases, differences from the hypothesis become statistically significant

c)Very small differences from the hypothesis may become statistically significant when the sample size is increased

d)If you collect 100 variables and perform 100 statistical tests, only those variables where the differences are biologically important will have p values less than 0.05

3)Which of the following is correct?

a)The margin of error includes uncertainty because some variables are not measured properly

b)The confidence interval accounts for nonresponse because the final sample size is smaller than planned

c)As the sample mean increases, the margin of error increases

d)Undercoverage errors can introduce uncertainty that is larger than the margin of error

4)A shipment of 1000 small lab mice arrives at the animal care facility with a nominal weight of 12 g per mouse. A sample of mice is selected and weighed. The average weight of the sample is 11.4 g. From past shipments, it is known that the standard deviation of weight among mice is 3 g. The technician wishes to test the hypothesis that the average weight of the mice matches the nominal value vs. that the mice are underweight at = 0.05. The p-value for the test was 0.051. Which of the following is correct?

a)If the nominal weight were correct, there is a 5.1% chance that the sample weight would be 11.4 g (or less)

b)5.1% of mice are underweight

c)There is a 5.1% chance that the mean weight of the mice is 11.4 g

d)There is a 5.1% change that the nominal weight of 12 g is more than the sample mean of 11.4 g