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Instead of having a known sigma equal to 10, suppose you simply do not know what...
Suppose you are interested in finding out how happy the students are at UNR. You design...
Suppose you are interested in finding out how happy the students are at UNR. You design a survey that probes aspects of an individual’s emotional life, and using this survey are able to compute an accuracy index score ranging from 0 (completely miserable) to 100 (nauseatingly happy). You know that the standard deviation of the population (sigma) equals 8; however you do not know, and want to know, what the mean of the population (mu) is. Rather than give the...
Activity Four: Confidence Intervals – Sigma unknown Suppose it takes, on average, 10 days to deliver...
Activity Four: Confidence Intervals – Sigma unknown Suppose it takes, on average, 10 days to deliver a computer to a customer. This statistic was generated from observing 100 deliveries. The population standard deviation is unknown, but from your observation of 100 deliveries, you calculate the sample standard deviation to be 2 days. The shipping manager would like to construct a 95% and 99% confidence interval (CI) estimate of delivery time. You estimate the mean delivery time to fall between ___...
Assume that IQ's follow a Normal distribution with a mean mu=100 and standard deviation sigma=16. What...
Assume that IQ's follow a Normal distribution with a mean mu=100 and standard deviation sigma=16. What is the probability that no more than 5 people in a random sample of size n=9 have IQ's between 90 and 110?
help with 1-10 please!!!! You are doing marketing research about yoqurt consumption Based on your previous...
help with 1-10 please!!!!
You are doing marketing research about yoqurt consumption Based on your previous research you feel sure that the population standard deviation of the number of yogurts consumed per year is 6. In other words, is known and = 6 You take a sample of 50 consumers and the sample mean is 32 yogurts consumed per year in other words. 32. You want to develop a confidence interval for the population mean) such that you are 90%...
2. A population is known to have a standard deviation of 26.1. A sample space of...
2. A population is known to have a standard deviation of 26.1. A sample space of 35 items has a mean of (1 point) 562. Construct a 90% confidence interval estimate of the mean of the population. 0566<p<558 0555<pバ569 O 551<H573 0561<p<563 3. While researching the cost of school lunches per week across the state, you use a sample size of 45(point) weekly lunch prices. The standard deviation is known to be 68 cents. In order to be 90% confident,...
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a...
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a preschool teacher, wants to estimate the mean score on preliteracy tests for the population of three-year-olds. She draws a simple random sample of 20 students from her class of three-year-olds and records their preliteracy scores (in points). 74, 79, 83, 85, 88, 90, 94, 95, 95, 97,99, 99, 100, 103, 105, 105, 106, 107, 107, 108 Click to download the data in your preferred...
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a...
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a preschool teacher, wants to estimate the mean score on preliteracy tests for the population of three-year-olds. She draws a simple random sample of 20 students from her class of three-year-olds and records their preliteracy scores (in points) 74,79,83,85, 88, 90, 94,95, 95,97,99,99, 100, 103, 105, 105,106, 107, 107, 108 Click to download the data in your preferred format. CrunchIt! CSV Excel JMP Mac Text...
6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1...
6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1 point) We are 99% confident that the interval frorn 0 328 to 0 486 actually does contain the true value of the population mean μ There is a 99% chance that the true value ofμ will fall between 0 328 and 0 486. 99% of sample means fall between 0328 and 0486. We are confident that 99% of values between 0.328 and 0 486...
Imagine you want to compare the mean of a sample (Xbar = 10, sample standard deviation...
Imagine you want to compare the mean of a sample (Xbar = 10, sample standard deviation = 20, N = 100) to a known population mean (mu = 13, population standard deviation unknown) using the single-sample t-test. What is the value of Cohen's d? 0.15 0.20 0.50 0.80
7. You want to estimate the mean weight loss of people one year after using a...
7. You want to estimate the mean weight loss of people one year after using a popular weight-loss (1 point) program being advertised on TV. How many people on that program must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.25 ib of the true population mean? Assume that the population standard deviation is known to be 10.6 lb. 6907 0 4865 O 84 O6906 3. Given the standard deviation of...
help with 1-10 please!!!!
You are doing marketing research about yoqurt consumption Based on your previous research you feel sure that the population standard deviation of the number of yogurts consumed per year is 6. In other words, is known and = 6 You take a sample of 50 consumers and the sample mean is 32 yogurts consumed per year in other words. 32. You want to develop a confidence interval for the population mean) such that you are 90%...
2. A population is known to have a standard deviation of 26.1. A sample space of 35 items has a mean of (1 point) 562. Construct a 90% confidence interval estimate of the mean of the population. 0566<p<558 0555<pバ569 O 551<H573 0561<p<563 3. While researching the cost of school lunches per week across the state, you use a sample size of 45(point) weekly lunch prices. The standard deviation is known to be 68 cents. In order to be 90% confident,...
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a preschool teacher, wants to estimate the mean score on preliteracy tests for the population of three-year-olds. She draws a simple random sample of 20 students from her class of three-year-olds and records their preliteracy scores (in points). 74, 79, 83, 85, 88, 90, 94, 95, 95, 97,99, 99, 100, 103, 105, 105, 106, 107, 107, 108 Click to download the data in your preferred...
Suppose the preliteracy scores of three-year-old students in the United States are normally distributed. Shelia, a preschool teacher, wants to estimate the mean score on preliteracy tests for the population of three-year-olds. She draws a simple random sample of 20 students from her class of three-year-olds and records their preliteracy scores (in points) 74,79,83,85, 88, 90, 94,95, 95,97,99,99, 100, 103, 105, 105,106, 107, 107, 108 Click to download the data in your preferred format. CrunchIt! CSV Excel JMP Mac Text...
6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1 point) We are 99% confident that the interval frorn 0 328 to 0 486 actually does contain the true value of the population mean μ There is a 99% chance that the true value ofμ will fall between 0 328 and 0 486. 99% of sample means fall between 0328 and 0486. We are confident that 99% of values between 0.328 and 0 486...
7. You want to estimate the mean weight loss of people one year after using a popular weight-loss (1 point) program being advertised on TV. How many people on that program must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.25 ib of the true population mean? Assume that the population standard deviation is known to be 10.6 lb. 6907 0 4865 O 84 O6906 3. Given the standard deviation of...
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