Question 7 Find a 95% confidence interval for the slope of the model below with n...
Find a 95% confidence interval for the slope of the model below with n = 30. Coefficients: Estimate Std.Error t value Pr>It|) (Intercept) 7.796 -0.4027 1.249 0.2275 6.24 -1.77 0.000 0.087 Dose Round your answers to three decimal places. to i
Question 2 View Policies Current Attempt in Progress Use the computer output to estimate the interceptſ, and the slope 31. Coefficients: Estimate (Intercept) 7.801 Dose -0.289 Std.Error tvalue 1.250 6.24 0.1633 -1.77 Pr(>Itſ) 0.000 0.087 Intercept Bo : i Slope ßı : i
Find the 95% confidence interval for the slope in each of the following settings. (Round your answers to three decimal places.) (a) n = 20, ŷ = 26.5 + 1.4x, and SEb1 = 0.65 ( __________ , ____________ ) (b) n = 30, ŷ = 30.2 + 2.9x, and SEb1 = 1.45 ( __________ , ____________ ) (c)n = 100, ŷ = 29.9 + 2.9x, and SEb1 = 1.45 ( __________ , ____________ )
Chapter 9, Section 1, Exercise 008 Computer output for fitting a simple linear model is given below. State the value of the sample slope for the given model. In testing if the slope in the population is different from zero, identify the p-value and use it (and a 5% significance level) to make a clear conclusion about the effectiveness of the model. Coefficients: Estimate Std.Error t value Pr(>Itl) Intercept) 820.15 88.19 9.30 0.000 -3.616 .186 -3.05 0.006 Sample slope p-value...
95% confidence interval (PART A and B) Find the 95% z-interval or t-interval for the indicated parameter. (a) μ x 151, s-36, n-32 (b) p p=0.7, n=50 (a) The 95% confidence interval for μ is to (Round to two decimal places as needed.)
Find a 95% confidence interval for the proportion of gasoline stations with at least one leaking underground tank. Round the answers to three decimal places. The 95% confidence interval is ( , ). How many stations must be sampled so that a 95% confidence interval specifies the proportion to within ±0.05? (Round up the final answer to the nearest integer.) Required information Leakage from underground fuel tanks has been a source of water pollution. In a random sample of 91 gasoline stations,...
Find the critical values for a 95% confidence interval using the chi-square distribution with 23 degrees of freedom. Round the answers to three decimal places. Critical values are _____ and ____
QUESTION 8 Use the confidence level and sample data to find a confidence interval for estimating the population u. Round your answer to the same numbe of decimal places as the sample mean. A random sample of 1 17 full grown lobsters had a mean weight of 22 ounces and a standard deviation of 2.7 ounces. Construct a 98% confidence interval for the population mean . ?20 oz < ? < 22 oz 022 oz < ? < 24 oz...
Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point estimate for p , the margin of error, and the confidence interval. Assume the results come from a random sample. A 95% confidence interval for the proportion of the population in Category A given that 18% of a sample of 450 are in Category A. Round your answer for the point estimate to two decimal places, and your...
Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point estimate for p, the margin of error, and the confidence interval. Assume the results come from a random sample. A 95% confidence interval for p given that p^=0.39 and n=525. Round your answer for the best point estimate to two decimal places, and your answers for the margin of error and the confidence interval to three decimal places....