10. Weights of Bears: The health of the bear population in a certain area is monitored byperiodic measurements taken from anesthetized bears. A sample of 54 bears hasweights listed in the bear's data set in the data download. The Minitab worksheet is bearmeasurements.a. Assuming that ơ is known to be 121.8 lb., find a 95% confidence interval estimate ofthe mean of the population of all such bear weights.b. Find a 95% confidence interval estimate of the mean of the population of all suchbear weights, assuming that the population standard deviation ơ is not known.c. Compare the results from parts (a) and (b).11. Body Mass Index: Refer to Body measurements in the data download and usethe sample data. Construct a 95% confidence interval estimate of the standarddeviation of body mass indexes.12. Using Summary Statistics: A study was conducted to estimate hospital costs foraccident victims who wore seat belts. Twenty randomly selected cases have astribution that appears to be bell-shaped with a mean of $9004 and a standarddeviation of $5629 (based on data from the U.S. Department of Transportation).Construct the 95% confidence interval for the mean of all such costs. 7. Mendelian Genetics: When Mendel conducted his famous genetics experiments withpeas, one sample of offspring consisted of 428 green peas and 152 yellow peas.a. Use Minitab to find the following confidence interval estimates of the percentage ofyellow peas.99.5% confidence interval:99% confidence interval:98% confidence interval:95% confidence interval:90% confidence interval:b. After examining the pattern of the above confidence intervals, complete thefollowing statement. “As the degree of confidence decreases, the confidence intervallimitsc. In your own words, explain why the preceding completed statement makes sensethat is, why should the confidence intervals behave as you have described?8. Misleading Survey Responses: In a survey of 1002 people, 701 said that they voted ina recent presidential election (based on data from ICR Research Group). Voting recordsshow that 61% of eligible voters actually did vote. Find a 95% confidence intervalestimate of the proportion of people who say that they voted9. Estimating Car Pollution: In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained: 0.06, 0.11,0.16, 0.15, 0.14, 0.08, 0.15 (based on data from the Environmental Protection Agency).Assuming that this sample is representative of the cars in use, construct a 95%confidence interval estimate of the mean amount of nitrogen-oxide emission for all cars.

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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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A) Calculate the mean and standard deviation of the data below with the attach equations (picture 1) and what is the standard error of the mean. DATA BELOW: 0.8775 +- 0.0051 0.8751+- 0.0061 0.8791+-0.0079 0.84087+-0.0039 B) find the weighted average (picture 2) and uncertainty from the data above
Answer part c
The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of $3700. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance σ2 and the population standard deviation σ.Use a 95% level of confidence. Interpret the results. What is the confidence interval for the population variance σ2?
2.1% 13.6% Normal Distribution 34.1% 34.1% 13.6% 2.1% A) Using the neck sizes of the shirts of the 100 college students in the DO NOW - μ-20 inches o- 5inches Find the neck size of a student above 2 standard deviations above the mean. B) What percentile will Eric fall if he has a neck size of 30 inches?
Consider the following population data; 0, -4, 2, -8, 10 a) Calculate the population variance. b) Calculate the population standard deviation
The sample mean is often used as an estimator of the population mean because of its desirable properties, including: a. unbiasedness, consistency and efficiency Ob.consistency and minimum sampling error only Oc unbiasedness and consistency only Od. unbiasedness and efficiency only Oe. unbiasedness, consistency and minimum sampling error
Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
Chapter 16 covers nonparametric testing procedures. What does nonparametric mean? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a We are not testing population parameters. There is no data involved. The procedure is not based on the assumption of a normal distribution. There are no assumptions that have to be met in order to perform the procedure.
Question 82 parts A, B, and C
Given two dependent random samples with the following results: Population 1 35 34 45 30 49 25 34 Population 2 44 24 40 42 38 31 43 Use this data to find the 90% confidence interval for the true difference between the population means. Assume that both populations are normally distributed. Step 2 of 4 : Calculate the sample standard deviation of the paired differences. Round your answer to six decimal places. please highlight the answer
Given two dependent random samples with the following results: Population 1 48 29 32 29 38 31 28 Population 2 45 38 41 16 40 28 38 Use this data to find the 95% confidence interval for the true difference between the population means. Assume that both populations are normally distributed. Copy Data Step 2 of 4 : Calculate the sample standard deviation of the paired differences. Round your answer to six decimal places.
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