Preliminary data analyses indicate that you can reasonably consider the assumptions for usingpooled t-procedures satisfied. Independent random samples of released prisoners in the fraudand firearms offense categories yielded the following information on time served, in months.Obtain a 98% confidence interval for the difference between the mean times served by prisonersin the fraud and firearms offense categories.(Note: x₁ = 10.14, s₁ = 4.61, x₂ = 18.08, and s2 = 5.41.)The 98% confidence interval is from to(Round to three decimal places as needed.)Fraud Firearms14.4 12.5 17.5 22.615.2 14.1 25.1 15.44.5 12.4 21.7 24.25.2 5.3 10.5 17.413.3 4.5 9.3 17.1

The question is about confidence interval Given : x¯1 = 10.14s1 = 4.61x¯2 = 18.08s2 = 5.41 No. of…

Answered: Preliminary data analyses indicate that…

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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Similar questions

Consider the time it takes, in minutes, for police officers to respond to a 911 call, where a life-threatening crime (an armed robbery, an assault, a shooting) is in progress. For a particular police jurisdiction, the average response time is 20 minutes with a standard deviation of 3 minutes. Assuming the data is symmetric and using the Empirical rule, what %% of the response times fall between 17 to 23 minutes.
If given an extremely non-normal empirical frequency distribution, does it make sense for a researcher to find the percentile rank using the z score and the standard normal distribution table?
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"
In a sample of seven cars, each car was tested for nitrogen oxide emissions (in grams per mile). The results appear below. Assuming that nitrogen oxide emissions are normally distributed, 4. Car 1 2 3 4 5 6 7 Nitrogen oxide emission (g/mi) 0.13 0.18 0.15 0.09 0.12 0.18 0.08 a. Construct a 95% confidence interval for the mean amount of nitrogen oxide emissions for all cars. b. What effect would increasing the level of confidence have on the length of the interval?
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 42 and a standard deviation of 8. Using the empirical rule (as presented in the book), what is the approximate percentage of daily phone calls numbering between 26 and 58?Do not enter the percent symbol.ans = %
A study of the following financial institutions showed their assets in million and pretax profit. AT the .05 significance level, can we conclude that there is positive correlation in the population? Follow the correlation coefficient 101 example and complete steps 1-7. STEP 1 Specify the population parameter of interest. STEP 2 Formulate the appropriate null and alternative hypotheses. STEP 3 Specify the level of significance STEP 4 Compute the correlation (r) coefficient and the (t) test statistics. You can use excel to compute the correlation. The following sample data were obtained. Assets in million 20 40 20 30 10 10 Pretax Profit 30 60 40 60 30 40 Compute the t-test statistic. What is the degrees of freedom (df)? What is the results of t-test statistic ________________ STEP 5 Construct the rejection region and decision rule. STEP 6 Reach a decision. (Reject or Do Not Reject) STEP 7 Draw a conclusion.
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 35 and a standard deviation of 7. Using the empirical rule (as presented in the book), what is the approximate percentage of daily phone calls numbering between 28 and 42?Do not enter the percent symbol.ans = %

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