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3. of 300 people eating lunch at a department store cafeteria, 102 had dessert. What is...
5. In a random sample of 500 persons eating lunch at a department store cafeteria, 204...
5. In a random sample of 500 persons eating lunch at a department store cafeteria, 204 persons had of persons usually eating dessert in this dessert. Construct a 90% confidence interval for the true proportion cafeteria.
1. A random sample of 82 customers, who visited a department store, spent an average of...
1. A random sample of 82 customers, who visited a department store, spent an average of $71 at this store. Suppose the standard deviation of expenditures at this store is O = $19. What is the e 98% confidence interval for the population mean? 2. A sample of 25 elements produced a mean of 123.4 and a standard deviation of 18.32 Assuming that the population has a normal distribution, what is the 90% confidence interval for the population mean? 3....
Ahmed àon the paper providenk, do not use your own pager. Work only on ne proteem on each aheet the tue ides of the some of the problens you are working on by Awer te Part b)" tthe wamber of...
Ahmed àon the paper providenk, do not use your own pager. Work only on ne proteem on each aheet the tue ides of the some of the problens you are working on by Awer te Part b)" tthe wamber of the problem top of the page). Do not une a red pen or a red pencil. Do not write in the corner covered t that you up by the same amount of credit Show all your work. the staple (top...
Data were collected on the amount spent by 64 customers for lunch at a major Houston...
Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based upon past studies the population standard deviation is known with ơ $5. Click on the datafile logo to reference the data. DATA file Round your answers to two decimal places. Use the critical value with three decimal places. a. At 99% confidence, what is the margin of error? . Develop a 99% confidence...
NOTE VOTE Out of 300 people sampled, 249 preferred Candidate A. Based on this, estimate what...
NOTE VOTE Out of 300 people sampled, 249 preferred Candidate A. Based on this, estimate what proportion of the voting population (TT) prefers Candidate A. Use a 95% confidence level, and give your answers as decimals, to three places. <t< If n=560 and p (p-hat) =0.23, find the margin of error at a 90% confidence level Give your answer to three decimals License Points possible: 1 This is attempt 1 of 1.
please show all work Question 3 (13 points) In a survey of 1002 people, 70% said...
please show all work
Question 3 (13 points) In a survey of 1002 people, 70% said that they voted in a recent presidential election. Answer the questions to construct and interpret a 95% confidence interval for the true percentage of people who say they voted. a. (1 pt.) What parameter are you estimating? (p or u) b. (1 pt.) Give the point estimate that you will use. c. (3 pts.) Compute the margin of error. Show your work! d. (1...
1: Suppose that you take a random sample of 300 people and find that 102 of...
1: Suppose that you take a random sample of 300 people and find that 102 of them say they prefer to buy organic food whenever possible, even if it’s more expensive. What is the sample proportion of people who prefer to buy organic? What is the standard deviation of the sample proportion? Calculate a 95% confidence interval for the population proportion. Do you reject the null hypothesis: p = 40%? Do you reject the null hypothesis p = 30%? 2:...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
Problem 3. A department store investigated the effects of advertising expenditure on the weekly sales for...
Problem 3. A department store investigated the effects of advertising expenditure on the weekly sales for its men's wear, children's wear, and women's wear departments. Five weeks were randomly selected for each department to be used in the analysis (this makes 15 weeks in total, ?n). The variables are as follows: ?y = weekly sales ?1x1 = advertising expenditure ?2x2 = 1 if it is the children's wear department and a 0 otherwise ?3x3 = 1 if it is the...
1. A C level confidence interval is described as what? (3 points) Oan interval computed from...
1. A C level confidence interval is described as what? (3 points) Oan interval computed from a data sample by a method that has the probability C of producing an interval containing the true value of the parameter any interval within the margin of error O an interval with a margin of error C that is also correct C% of the time Oany interval that follows the 68-95-99.7 rules Oan interval computed from a data sample that guarantees that the...
5. In a random sample of 500 persons eating lunch at a department store cafeteria, 204 persons had of persons usually eating dessert in this dessert. Construct a 90% confidence interval for the true proportion cafeteria.
1. A random sample of 82 customers, who visited a department store, spent an average of $71 at this store. Suppose the standard deviation of expenditures at this store is O = $19. What is the e 98% confidence interval for the population mean? 2. A sample of 25 elements produced a mean of 123.4 and a standard deviation of 18.32 Assuming that the population has a normal distribution, what is the 90% confidence interval for the population mean? 3....
Ahmed àon the paper providenk, do not use your own pager. Work only on ne proteem on each aheet the tue ides of the some of the problens you are working on by Awer te Part b)" tthe wamber of the problem top of the page). Do not une a red pen or a red pencil. Do not write in the corner covered t that you up by the same amount of credit Show all your work. the staple (top...
Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based upon past studies the population standard deviation is known with ơ $5. Click on the datafile logo to reference the data. DATA file Round your answers to two decimal places. Use the critical value with three decimal places. a. At 99% confidence, what is the margin of error? . Develop a 99% confidence...
NOTE VOTE Out of 300 people sampled, 249 preferred Candidate A. Based on this, estimate what proportion of the voting population (TT) prefers Candidate A. Use a 95% confidence level, and give your answers as decimals, to three places. <t< If n=560 and p (p-hat) =0.23, find the margin of error at a 90% confidence level Give your answer to three decimals License Points possible: 1 This is attempt 1 of 1.
please show all work
Question 3 (13 points) In a survey of 1002 people, 70% said that they voted in a recent presidential election. Answer the questions to construct and interpret a 95% confidence interval for the true percentage of people who say they voted. a. (1 pt.) What parameter are you estimating? (p or u) b. (1 pt.) Give the point estimate that you will use. c. (3 pts.) Compute the margin of error. Show your work! d. (1...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
1. A C level confidence interval is described as what? (3 points) Oan interval computed from a data sample by a method that has the probability C of producing an interval containing the true value of the parameter any interval within the margin of error O an interval with a margin of error C that is also correct C% of the time Oany interval that follows the 68-95-99.7 rules Oan interval computed from a data sample that guarantees that the...
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