poll is taken in which 354 out of 600 randomly selected voters indicated their preference for a certain candidate. (a) Find a 99% confidence interval for ?. ≤?≤  (b) Find the margin of error for this 99% confidence interval for ?. (c) Without doing any calculations, indicate whether the margin of error is larger or smaller or the same for an 80% confidence interval. A. smaller B. larger

Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)

A psychologist is interested in constructing a 99% confidence interval for the proportion of people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain. 56 of the 700 randomly selected people who were surveyed agreed with this theory. Round answers to 4 decimal places where possible. a.  With 99% confidence the proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain is between      and      . b.  If many groups of 700 randomly selected people are surveyed, then a different confidence interval would be produced from each group. About              percent of these confidence intervals will contain the true population proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain and about                 percent will not contain the true population proportion.

Two intervals are given, A and B, for the same value of the explanatory variable. A: 11 to 17; B: 8 to 20; (a) Which interval is the confidence interval for the mean response?A or B Which interval is the prediction interval for the response?A or B (b) What is the predicted value of the response variable for this value of the explanatory variable?Enter the exact answer.The predicted value is=

A confidence interval for a mean is (−13,14)-13,14. This interval would be wider if A.)The sample mean was larger or the variability of the data was larger. B.) The variability of the data was larger, or the investigator wanted to be more confident. C.) The investigator wanted to be more confident of their results, or there was more information. D.) The variability of the data was small, or the sample mean was larger. E.) None of the above.

Suppose 500 different researchers all randomly select samples of n = 300 individuals from a population. Each researcher uses his or her sample to compute a 95% confidence interval for the proportion who have blue eyes in the population. About how many of the confidence intervals will cover the population proportion? About how many of the intervals will not cover the population proportion? Briefly explain how you determined your answers. About About which is % of the 500 computed intervals, should contain the population proportion. which is % of the 500 computed intervals, should not contain the population proportion.

A poll is taken in which 398 out of 550 randomly selected voters indicated their preference for a certain candidate. Find a 80% confidence interval for ?. ≤?≤