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On a certain day, Gallup reported that of the 1,008 people surveyed, 71% of U.S. workers...
In a poll, 51% of the people polled answered yes to the question "Are you in...
In a poll, 51% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 3%, and the estimate was made with 96% confidence. At least how many people were surveyed? Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). The minimum number of surveyed people was...
Thirty small communities in Connecticut (population near 10,000 each) gave an average of 138.5 reported cases...
Thirty small communities in Connecticut (population near 10,000 each) gave an average of 138.5 reported cases of larceny per year. Assume that is known to be 42.1 cases per year. (a) Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities What is the margin of error? (Round your answers to one decimal place.) lower limit upper limit margin of error (b) Find a 95% confidence interval for the population mean annual...
PART 1 31 people were surveyed and reported the amount of money they spend on a...
PART 1 31 people were surveyed and reported the amount of money they spend on a typical date night. The results were roughly bell-shaped with a mean of $35 and standard deviation of $20. Construct a confidence interval at a 98% confidence level. Give your answers to two decimal places. PART 2 A variable x is normally distributed with mean 19 and standard deviation 6. Round your answers to the nearest hundredth as needed. a) Determine the z-score for x=29....
We will use this prompt for this and the next 1 question. A survey reported in...
We will use this prompt for this and the next 1 question. A survey reported in Time magazine included the question ‘‘Do you favor a federal law requiring a 15 day waiting period to purchase a gun?” Results from a random sample of US citizens showed that 318 of the 520 men who were surveyed supported this proposed law while 379 of the 460 women sampled said ‘‘yes”. Use this information to find a 90% confidence interval for the difference...
Determine the t-value in each of the cases Click the icon to view the table of...
Determine the t-value in each of the cases Click the icon to view the table of areas under the t-distribution. (a) Find the t-value such that the area in the right tail is 0.05 with 9 degrees of freedom. Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.15 with 28 degrees of freedom. (Round to three decimal places as needed.) le) Find the t-value such that the area...
Please help how to solve this?? An agency surveyed people worldwide, asking them, "Do you live...
Please help how to solve this??
An agency surveyed people worldwide, asking them, "Do you live in a household with more than one car?" Of the 1243 respondents surveyed in India, 492 said they live in a household with more than one car. In Canada, of the 861 respondents, 575 said they lived in a household with more than one car. Find the margin of error for a 99% confidence interval for the difference in proportions for households with more...
In a recent study, 30% of people surveyed indicate chocolate was their favorite flavor of ice...
In a recent study, 30% of people surveyed indicate chocolate was their favorite flavor of ice cream. Suppose we select a sample of 9 people and ask them to name their favorite flavor of ice cream. How many of those in the sample would you expect to name chocolate? (Round your answer to 1 decimal place.) What is the probability exactly three of those in the sample name chocolate? (Round the probability to 5 decimal places and the final answer...
{Exercise 8.7 (Algorithmic)} The Wall Street Journal reported that automobile crashes cost the United States $162...
{Exercise 8.7 (Algorithmic)} The Wall Street Journal reported that automobile crashes cost the United States $162 billion annually (The Wall Street Journal, March 5, 2008). The average cost per person for crashes in the Tampa, Florida, area was reported to be $1599. Suppose this average cost was based on a sample of 30 persons who had been involved in car crashes and that the population standard deviation is σ = $600. What is the margin of error for a 95%...
A 2013 Gallup poll asked randomly selected U.S. adults whether they wanted to stay at their current body weight or change
Chapter 05.2 Exercise Question 21 5.2.21 A 2013 Gallup poll asked randomly selected U.S. adults whether they wanted to stay at their current body weight or change. One purpose was to investigate whether there was any difference between men and women with regard to this aspect. Of the 562 men surveyed, 242 wanted to stay at their current weight, whereas of the 477 women surveyed, 172 wanted to stay at their current weight. Use an appropriate randomization-based applet to find a p-value. Round...
According to a Field Poll, 400 out of 506 surveyed California adults feel that “education and...
According to a Field Poll, 400 out of 506 surveyed California adults feel that “education and our schools” is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education and the schools are one of the top issues facing California. 1. A point estimate for the true population proportion is: _______________ (Write as a decimal and round to 4 decimal places) 2. The margin...
In a poll, 51% of the people polled answered yes to the question "Are you in favor of the death penalty for a person convicted of murder?" The margin of error in the poll was 3%, and the estimate was made with 96% confidence. At least how many people were surveyed? Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). The minimum number of surveyed people was...
Thirty small communities in Connecticut (population near 10,000 each) gave an average of 138.5 reported cases of larceny per year. Assume that is known to be 42.1 cases per year. (a) Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities What is the margin of error? (Round your answers to one decimal place.) lower limit upper limit margin of error (b) Find a 95% confidence interval for the population mean annual...
Determine the t-value in each of the cases Click the icon to view the table of areas under the t-distribution. (a) Find the t-value such that the area in the right tail is 0.05 with 9 degrees of freedom. Round to three decimal places as needed.) (b) Find the t-value such that the area in the right tail is 0.15 with 28 degrees of freedom. (Round to three decimal places as needed.) le) Find the t-value such that the area...
Please help how to solve this??
An agency surveyed people worldwide, asking them, "Do you live in a household with more than one car?" Of the 1243 respondents surveyed in India, 492 said they live in a household with more than one car. In Canada, of the 861 respondents, 575 said they lived in a household with more than one car. Find the margin of error for a 99% confidence interval for the difference in proportions for households with more...
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