Find the critical value t for the following situations. a) a 95% confidence b) a 90% confidence interval based on df = 21 interval based on df = 3
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- If X = 114, α= 20, and n = 33, construct a 99% confidence interval estimate for the population mean, µ.If X=70, σ=14, and n=61, construct a 99% confidence interval estimate of the population mean, μ.Find the critical value t for the following situations. a) a 90% confidence interval based on df = 18 b) a 98% confidence interval based on df = 7 a) What is the critical value of t for a 90% confidence interval with df = 18? (Round to two decimal places as needed.)
- Find each value of z/α2. Use a graphing calculator and round the answers to three decimal places. (a) z/α2 for the 90% confidence interval24 b. Find the critical value t a/2 corresponding to a 95% confidence intervalA simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 107, and the sample standard deviation, s, is found to be 10. (a) Construct a 96% confidence interval about u if the sample size, n, js 16. (b) Construct a 96% confidence interval about u if the sample size, n, is 21. (c) Construct a 99% confidence interval about u if the sample size, n, is 16. (d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed? Click the icon to view the table of areas under the t-distribution. (a) Construct a 96% confidence interval about u if the sample size, n, is 16. Lower bound:: Upper bound: (Use ascending order. Round to one decimal place as needed) (b) Construct a 96% confidence interval about u if the sample size, n, is 21. Lower bound:: Upper bound: (Use ascending order. Round to one decimal place as needed) How does increasing the sample size affect the margin of…
- Find only t∗ for the following cases (Round to 4 decimal places): (a) n = 18 and for 99% confidence interval.(b) n = 23 and for 95% confidence interval.(c) n = 10 and for 90% confidence interval.(d) n = 20 and for 98% confidence interval.I need the 95% confidence interval for part a and for part b it would be set up as Ho: mew = 3.1 H1: mew > 3.1Determine the t critical value for a two-sided confidence interval in each of the following situations. (Round your answers to three decimal places.) Confidence level = 95%, df = 5 Confidence level = 95%, df = 10 Confidence level = 99%, df = 10 Confidence level 99%, n = 10 Confidence level = 98%, df = 22 Confidence level = 99%, n = 34
- Determine the t critical value for a two-sided confidence interval in each of the following situations. (Round your answers to three decimal places.) J Confidence level = 95%, df = 5 Confidence level = 95%, df = 10 Confidence level = 99%, df = 10 Confidence level - 99%, n = 10 Confidence level = 98%, df = 22 ) Confidence level = 99%, n = 34Suppose we are making predictions of the dependent variable y for specific values of the independent variable x using a simple linear regression model holding the confidence level constant. Let Width (C.I) = the width of the confidence interval for the average value y for a given value of x, and Width (P.I) = the width of the prediction interval for a single value y for a given value of x. Which of the following statements is true? Width (C.I) = 0.5 Width (P.I) Width (C.I) = Width (P.I) Width (C.I) > Width (P.I) Width (C.I) < Width (P.I)A 95% confidence interval for the difference in proportions of rotted fruit between Orchard A and Orchard B is (0.03, 0.11). What does this mean? X Previous C 95% of the fruit at Orchard A and B are between 3% and 11% rotted. We are 95% confident that the difference in the percentages of rotted fruit at these orchards is between 3 and 11 percentage points. The percentage of rotted fruit at Orchard B is between 3 and 11 percentage points higher than Orchard A. 4 r We are 95% confident that the Orchard A has between 3% and 11% rotted fruit. f 5 % 5 t g Oll A 6 b y h & 7 n O u j 8 m i k ( 9 V O alt 1 e A ctrl [ Next G backspac }
