Consider a random sample of 9 measurements obtained from a normally distributed population with = 450...

Consider a random sample of 9 measurements obtained from a normally distributed population with = 450 and s = 60. Construct a 90% confidence interval

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orchestra answered 2 years ago

Assume that the sample is a simple random sample obtained from a normally distributed population of...

Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 1% of sigma. Is this sample size practical? sigma To be 95% confident that s is within 1% 5% 10% 20% 30% 40% 50% of the value of sigma, the sample size n should be at...

A simple random sample of 44 adults is obtained from a normally distributed? population, and each?...

A simple random sample of 44 adults is obtained from a normally distributed? population, and each? person's red blood cell count? (in cells per? microliter) is measured. The sample mean is 5.25 and the sample standard deviation is 0.55. Use a 0.01 significance level and the given calculator display to test the claim that the sample is from a population with a mean less than 5.4 comma which is a value often used for the upper limit of the range...

A simple random sample of 60 adults is obtained from a normally distributed? population, and each?...

A simple random sample of 60 adults is obtained from a normally distributed? population, and each? person's red blood cell count? (in cells per? microliter) is measured. The sample mean is 5.24 and the sample standard deviation is 0.51 Use a 0.01 significance level and the given calculator display to test the claim that the sample is from a population with a mean less than 5.4 which is a value often used for the upper limit of the range of...

Consider the following set of random measurements, taken from a normally distributed population before and after...

Consider the following set of random measurements, taken from a normally distributed population before and after a treatment was applied. Before Treatment [7.03, 6.95, 6.32, 7.93, 6.47, 7.26] After Treatment [6.27, 6.91, 6.59, 6.75, 5.61, 5.99] Difference [.76, .4E-1, -.27, 1.18, .86, 1.27] Test the null hypothesis H0:μD=0against the alternative hypothesis HA:μD≠0. What is the value of the t test statistic? Remember to run a T test on just he difference list. Round your response to at least 3 decimal...

A sample of 10 measurements, randomly selected from a normally distributed population, resulted in a sample...

A sample of 10 measurements, randomly selected from a normally distributed population, resulted in a sample mean=5.2, and sample standard deviation=1.8. Using ,alpha=0.01 test the null hypothesis that the mean of the population is 3.3 against the alternative hypothesis that the mean of the population < 3.3, by giving the following: degrees of freedom =9 critical t value the test statistic

A sample of 15 measurements, randomly selected from a normally distributed population, resulted in a sample...

A sample of 15 measurements, randomly selected from a normally distributed population, resulted in a sample mean, x¯¯¯=6.1 and sample standard deviation s=1.92. Using α=0.1, test the null hypothesis that μ≥6.4 against the alternative hypothesis that μ<6.4 by giving the following. a) The number of degrees of freedom is: df= . b) The critical value is: tα= . c) The test statistic is: ttest=

A simple random sample of 27 filtered 100-mm cigarettes is obtained from a normally distributed population,...

A simple random sample of 27 filtered 100-mm cigarettes is obtained from a normally distributed population, and the tar content of each cigarette is measured. The sample has a standard deviation of 0.20 mg. Use a 0.05 significance level to test the claim that the tar content of filtered 100-mm cigarettes has a standard deviation different from 0.30 mg, which is the standard deviation for unfiltered king-size cigarettes. Complete parts (a) through (d) below. A. Identify the null and alternative...

a simple random sample of 28 filtered 100-mm cigarettes is obtained from a normally distributed population...

a simple random sample of 28 filtered 100-mm cigarettes is obtained from a normally distributed population and the tar content of each cigarette is measured. the sample has a standard deviation of 0.16mg.use a 0.05 significance level to test the claim that the tar content of filtered 100-mm cigarettes has a standard deviation different from 0.20 mg, which is the standard deviation for unfiltered King size cigarettes

9. Assume that a simple random sample has been selected from a normally distributed population and...

9. Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. A coin mint has a specification that a particular coin has a mean weight of 2.5 g. A sample of 39 coins was collected. Those coins have a mean weight of 2.49476 g and a standard deviation of 0.01316 g. Use...

a simple random sample of 27 filtered 100-mm cigarettes os obtained from normally distributed population, and...

a simple random sample of 27 filtered 100-mm cigarettes os obtained from normally distributed population, and the tar content of each cigarette is measured. the sample has a standard deviation of 0.16 mg. use 0.05 significance level to test the claim that the tat content of filtered 100-mm cigarettes has a standard deviation different from 0.20 mg

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