Standard error for the proportion

Reference no: EM137746

1. A newspaper conducted a statewide survey concerning the 2000 race for state senator. The newspaper took a random sample (assume it is an SRS) of 1200 registered voters and found that 680 would vote for the Republican candidate. Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The margin of error for 99% confidence is

A. 0.014
B. 0.033
C. 0.037

2. A radio talk show host is interested in the proportion p of adults in his listening area who think the drinking age should be lowered to 18. To find this proportion out he poses the following question to his listeners: "Do you think that the drinking age should be reduced to 18 in light of the fact that 18 year olds are eligible for military service?" He asks listeners to phone in and vote "yes" if they agree the drinking age should be lowered and "no" if not. Of the 200 people who phoned, in 140 answered "yes". The standard error for the proportion of those who phoned in who answered "yes" is

A. 0.46
B. 0.032
C. 0.00105

3. A newspaper conducted a statewide survey concerning the 2000 race for state senator. The newspaper took a random sample (assume it is an SRS) of 1200 registered voters and found that 680 would vote for the Republican candidate. Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. We wish to see if there is evidence that the majority of voters prefer the Republican candidate. The hypotheses corresponding to this are

A. H0: p = 0.50 and Ha: p ≠ 0.50
B. H0: p = 0.50 and Ha: p > 0.50
C. H0: p = 0.57 and Ha: p > 0.57

Reference no: EM137746

Questions Cloud

Determine - test the hypotheses : A bank wants to get new customers for their credit card. They try two different approaches in their marketing campaign. The first promises a "cash back" reward; the second promises low interest rates. A sample of 500 people are mailed the first br..

Margin of error with confidence : An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..

Probability that the psychic correctly identifies the symbol : A noted psychic was tested for ESP. The psychic was presented with 400 cards face down and asked to determine if each card was marked with one of four symbols: a star, cross, circle, or square. The psychic was correct in 120 cases. Let p represent..

Determine the confidence interval : Which of the following assumptions for inference about a proportion using a confidence interval are violated,

Standard error for the proportion : Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is

The p-value of a test : To determine if this is evidence that students perform worse under uncomfortable conditions, The P-value of a test

Simple random samples from the appropriate populations : Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..

Find the standard error : The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom

Difference between the t and z distributions : The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions

User Account

All Pages