Question

In: Statistics and Probability

In a poll, 368 of 600 registered people intended to vote for Jim. With that information,...

In a poll, 368 of 600 registered people intended to vote for Jim. With that information, test the hypothesis at a 95% confidence level.Will Null Hypothesis rejected or not

Expert Solution

Solution:-

Given that

In a poll, 368 of 600 registered people intended to vote for Jim.

Test the hypothesis at a 95% confidence level. Will Null Hypothesis rejected or not

n = 600

x =368

population proportion

p = 0.6133

1 - p = 0.3867

standard error (S. E) =

S.E = 0.0199

At 95% confidence = 1 - 0.95 = 0.05

critical value at = 1.96

Margin of error E = critical value * S.E

= 1.96 * 0.0199

= 0.039

Confidence interval (C.I) =

= (0.5743 , 0.6523)

The 95% confidence interval is (0.5743 , 0.6523).

Reject null hypothesis if P value < α = 0.05 level of significance

Since 0.6133 > 0.05, hence we reject null hypothesis.

If you have any doubts please comment and please don't dislike.

PLEASE GIVE ME A LIKE. ITS VERY IMPORTANT FOR ME.

Thanks for supporting..

orchestra answered 2 years ago

5. A poll of 600 people showed that 240 drive 20 mi or more to work....

5. A poll of 600 people showed that 240 drive 20 mi or more to work. Construct a 98% CI for the population proportion of people who drive at least 20 mi. Is it reasonable to say that 50% drive 20 mi or more?

1. A poll found that out of 600 people polled, 72% of them owned and regularly...

1. A poll found that out of 600 people polled, 72% of them owned and regularly used data on their smartphone. a. Determine a 99% CI. b. Determine the margin of error for the CI in part (a). Round to three decimal places. c. For a 99% CI and a margin of error of 0.01, determine the necessary sample size for estimating ?.

IN A SURVEY OF 368 REGISTERED VOTERS, 167 OF THEM WISHED TO SEE MAYOR WAFFLESKATE LOSE...

IN A SURVEY OF 368 REGISTERED VOTERS, 167 OF THEM WISHED TO SEE MAYOR WAFFLESKATE LOSE HER NEXT ELECTION. CONSTRUCT A 90% CONFIDENCE INTERVAL FOR THE PROPORTION OF REGISTERED VOTER WHO WANT TO SEE MAYOR WAFFLESKATE DEFEATED.

an interactive poll found that 368 of 2,375 adults aged 18 or older have at least...

an interactive poll found that 368 of 2,375 adults aged 18 or older have at least one tattoo. (a) obtain a point estimate for the proportion of adults who have at least one tattoo (b) construct a 90% confidence interval for the proportion of adults with at least one tattoo (c) construct a 99% confidence interval for the proportion of adults with at least one tattoo (d) what is the effect of increasing the level of confidence on the width...

A statistics professor asked her students whether or not they were registered to vote. In a...

A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote. Questions 1 - 6 pertain to scenario 1. Question 1 (1 point) Which of the following properly explains the 95% confidence interval for the true proportion of the professor's students who were registered to vote? Question 1 options: a) We are 95 % confident that...

In a 2018 poll conducted by SurveyMonkey, they randomly surveyed 368 students from two- and four-year...

In a 2018 poll conducted by SurveyMonkey, they randomly surveyed 368 students from two- and four-year institutions across the U.S. According to the survey, 58% purchased at least one of their textbooks on Amazon. What proportion of all U.S. college students purchased at least one of their textbooks on Amazon? a. Use StatCrunch to find a 95% confidence interval: _________________ b. Interpret your confidence interval in words. c. True or False: A 90% confidence interval would be wider than a...

Consider the probability that no less than 92 out of 157 registered voters will vote in...

Consider the probability that no less than 92 out of 157 registered voters will vote in the presidential election. Assume the probability that a given registered voter will vote in the presidential election is 64% Approximate the probability using the normal distribution. Round your answer to four decimal places.

Before the last presidential debates, 50% of registered votes indicated they were planning to vote for...

Before the last presidential debates, 50% of registered votes indicated they were planning to vote for the incumbent president. In a recent poll of 1200 registered voters after the debates, 636 indicated they are planning to vote for the incumbent president. Has there been a significant increase in the proportion of registered voters who are planning to vote for the incumbent president? State the null and alternative hypotheses to be tested. Compute the test statistic. The null hypothesis is to...

) Before the last presidential debates, 50% of registered votes indicated they were planning to vote...

) Before the last presidential debates, 50% of registered votes indicated they were planning to vote for the incumbent president. In a recent poll of 1200 registered voters after the debates, 636 indicated they are planning to vote for the incumbent president. Has there been a significant increase in the proportion of registered voters who are planning to vote for the incumbent president? a. State the null and alternative hypotheses to be tested. b. Compute the test statistic. c. The...

In one city, 85% of eligible voters are registered to vote. If 425 randomly selected eligible...

In one city, 85% of eligible voters are registered to vote. If 425 randomly selected eligible voters are surveyed, what is the probability that at least 82% of those selected are registered to vote? A food snack manufacturer samples 20 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 12.3 and the sample standard deviation is 0.24, find the 90% confidence interval of the true mean. A random sample of 90 voters found...