For a normal population with known variance s2, answer the following questions: (a) What is the...

For a normal population with known variance s2, answer the following questions:

(a) What is the confidence level for the interval: ?− 1.85?/√?≤ ?≤ ?+ 1.85?/√??

(b) What is the confidence level for the interval: ?≤ ?+ 1.4?/√?

Expert Solution

From this table i have take the value of phi (probability ) from the value of t ..

Ally Wells answered 2 years ago

For a normal population with known variance σ2, answer the following questions: d. What is the...

For a normal population with known variance σ2, answer the following questions: d. What is the conﬁdence level for the interval μ ≤ x+ 2.00σ∕ √ n? e. What is the conﬁdence level for the interval x−1.96σ∕ √ n ≤ μ?

For a normal population with known variance (sigma)^2, what is the confidence level for the CI...

For a normal population with known variance (sigma)^2, what is the confidence level for the CI (mean)-2.14(sigma)/√n≤μ≤(mean)+2.14(sigma)/√n ?

For a normal population with known variance σ2, what value of zα/2 in the Equation below...

For a normal population with known variance σ2, what value of zα/2 in the Equation below gives a 98% CI? x-zα/2σn≤μ≤x+zα/2σn

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(Topic: Confidence Interval Estimation for the Mean of a Normal Distribution: Population Variance Known) The number...

(Topic: Confidence Interval Estimation for the Mean of a Normal Distribution: Population Variance Known) The number of bolts produced each hour from a particular machine is normally distributed with a standard deviation of 7.4. For a random sample of 15 hours, the average number of bolts produced was 587.3. Find the upper and lower confidence limits of a 98% confidence interval for the population mean number of bolts produced per hour. Find the answer by hand calculation. Find the answer...

Question: Consider a normal distribution with mean m and variance s2. Assume we know that s2...

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Assume a normal population with known variance σ2, a random sample (n< 30) is selected. Let...

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A random sample n=30 is obtained from a population with unknown variance. The sample variance s2...

A random sample n=30 is obtained from a population with unknown variance. The sample variance s2 = 100 and the sample mean is computed to be 75. Test the hypothesis at α = 0.05 that the population mean equals 80 against the alternative that it is less than 80. The null hypothesis Ho: µ = 80 versus the alternative H1: Ho: µ < 80. Calculate the test statistic from your sample mean. Then calculate the p-value for this test using...

Suppose we take a random sample X1,…,X6 from a normal population with a known variance σ21=4...

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Consider a normal population distribution with the value of o known. (a) What is the confidence...

Consider a normal population distribution with the value of \(\sigma\) known.(a) What is the confidence level for the interval \(\bar{x} \pm 2.88 \sigma / \sqrt{n} ?\) (Round your answer to one decimal place.)\(\%\)(b) What is the confidence level for the interval \(\bar{x} \pm 1.47 \sigma / \sqrt{n} ?\) (Round your answer to one decimal place.) \(\%\)(c) What value of \(z_{\alpha / 2}\) in the CI formula below results in a confidence level of \(99.7 \% ?\) (Round your answer to...

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