are finding a 98% for pnysical therapy patients. The data below show the number of visits for 11 randomly selected physical therapy patients. Round answers to 3 decimal places where possible. 22 7 23 10 23 22 | 26 19 20 15 17 a. To compute the confidence interval use a t v distribution. b. With 98% confidence the population mean number of visits per physical therapy patient is between 8.83 and visits. c. If many groups of 11 randomly selected physical therapy patients are studied, then a different

are finding a 98% for pnysical therapy patients. The data below show the number of visits for 11 randomly selected physical therapy patients. Round answers to 3 decimal places where possible. 22 7 23 10 23 22 | 26 19 20 15 17 a. To compute the confidence interval use a t v distribution. b. With 98% confidence the population mean number of visits per physical therapy patient is between 8.83 and visits. c. If many groups of 11 randomly selected physical therapy patients are studied, then a different

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The average house has 11 paintings on its walls. Is the mean smaller for houses owned by teachers? The data show the results of a survey of 12 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 8, 10, 11, 12, 9, 8, 12, 8, 12, 12, 9, 9 The test statistic ? t z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) Can you show the process on a ti84
Construct the confidence interval for the population mean for the number of hours that students spend doing their homework. The data below was from the sample you collected. Use a confidence level of 97% 17 9 11 0 4 15 19 31 19 15
Which of the following will decrease the confidence interval width for the population mean? A) Increase the confidence level and decrease the sample size. B) Increase the confidence level and increase the sample size. C) Decrease the confidence level and increase the sample size. D) Decrease the confidence level and decrease the sample size.
Use the confidence interval to find the margin of error and the sample mean. (12, 20) O E = 4, X = 20 O E = 4, X = 16 OE 8, X = 12 O E= 8, x = 16
Use a t-distribution to find a confidence interval for the difference in means µå = µ₁ − µ2 using the relevant sample results from paired data. Assume the results come from random samples from populations that are approximately normally distributed, and that differences are computed using d = X1 X₂. A 95% confidence interval for μ using the paired data in the following table: Situation 1 Give the best estimate for Ma Case 1 2 3 4 5 6 7 8 77 79 95 62 71 72 85 91 Situation 2 86 85 89 77 78 60 87 92 the margin of error, and the confidence interval. Enter the exact answer for the best estimate, and round your answers for the margin of error and the confidence interval to two decimal places.
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A statistics practitioner took a random sample of 60 observations from a population whose standard deviation is 31 and computed the sample mean to be 106. For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence Interval = C. Estimate the population mean with 99% confidence. Confidence Interval =
The data show the number of vacation days used in a recent year by a sample of 12 employees. 5 10 1 8 1 7 2 6 2 7 3 0 O a. Obtain the quartiles. b. Determine the interquartile range (IQR). c. Find the five-number summary. a. Obtain the quartiles. Q1 %D Q2 %3D Q3 (Type integers or decimals.) b. Determine the interquartile range. IQR = (Type an integer or a decimal.) c. Find the five-number summary. (Type integers or decimals. Use ascending order.)
Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval. n=49, x=55.1 seconds, s=4.8 seconds The margin of error is nothing seconds.
You are a researcher studying a certain species of fish in a local lake. You gather a random sample of 19 fish of this species and record the lengths (in centimeters) of the fish. The data is displayed in the table below. Estimate the mean length of all fish of this type in the lake. Use a 99% confidence level. 9.1 9 8.6 5.8 9.8 7.4 9.1 9.5 8.2 8.9 9.3 7.8 9 9.6 10.4 13.6 7.2 10.1 8.9 a) Find the confidence interval: b) What is the margin of error of your interval? c) Interpret your 99% confidence interval in context
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.