& 6.2Question 15, 6.1.38-TPart 1 of 4>HW Score: 48.86%, 17.1 of 35 pointsO Points: 0 of 1SaveYou are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean.Interpret the results and compare the widths of the confidence intervals.From a random sample of 36 months from January 2006 through December 2020, the mean number of tornadoes per month in the United States was about 104. Assumethe population standard deviation is 118.The 90% confidence interval is(Round to two decimal places as needed.)thisView an exampleGet more help -叮F3SearchF12F7F8F9F10F4F5F6*Clear allDelete+BackspaceNumLock10:05 PM3/17/2024*+

The objective of this question is to construct the 90% and 95% confidence intervals for the…

Answered: & 6.2 Question 15, 6.1.38-T Part 1 of 4…

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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This is not a graded assignment. This is only for practice
In a study on running and happiness, runners indicated the number of miles they ran in a day and their subsequent score on a Happiness Survey (higher score = greater happiness). Runner # of miles (x) Happiness Score (y) 1 16 12 2 4 3 12 14 4 2 8 For these data: The mean of miles run is: 8.50 The mean of the Happiness scores is: 10.00 The standard deviation of the Miles scores is: 5.72 The standard deviation of the Happiness scores is: 3.16 In your submission, please include a copy of the SPSS or Excel output and answer the following: A. What is the r and r? value? B. Based on Pearson's r and r2 value, describe the relationship (direction/strength) that exists between # of miles run and Happiness scores. C. Create a scatterplot for the data using Excel or SPSS (include output in your submission). D. Insert the prediction line from Excel/SPSS on your scatterplot.
Part 1 of 3 A researcher was investigating the size of math departments in Texas colleges. She believed the population standard deviation was 1.9. A sample of 42 colleges found their mean was 12.5. Find the 3-decimal small value of the 95% confidence interval of the mean. Part 2 of 3: Find the 3-decimal large value of the 95% confidence interval of the mean. Part 3 of 3: Find the 3-decimal margin of error
Given two independent random samples with the following results: n₁ = 16 n₂ = 8 x₁ = 94 X2: $₁ = 16 = 124 $2 = 28 Use this data to find the 90% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Copy Data Step 2 of 3: Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places.
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"
Sample # 1 and has been provided in the second screenshot (hand written)
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Boys and girls: The National Health Statistics Reports reported that a sample of 311 one-year-old boys had a mean weight of 25.3 pounds with a standard deviation of 3.6 pounds. In addition, a sample of 287 one-year-old girls had a mean weight of 24.2 pounds with a standard deviation of 4.0 pounds. Part: 0 / 2 0 of 2 Parts Complete Part 1 of 2 Construct a 95 % confidence interval for the difference between the mean weights. Let μ1 denote the mean weight of one-year-old boys. Use tables to find the critical value and round the answers to at least one decimal place. A 95 % confidence interval for the difference between the mean weights is
which of the following sample data: sample size= 100 sample mean= 340z/hr sample variance= 90z/ hr construct a 98% confidence interval for μ. the population mean is what?
Please answer all sections
Toby wants to know the average price of new cars at a particular dealearship. He randomly selects a sample of 31 cars and finds that the average price to be $19500$19500 with a standard deviation of $1640$1640. What is the 95% confidence interval for the mean price of cars at this particular dealership? With 95% confidence, we can say the true population mean price of cars at this dealership is between $____ and _____$ .Round to the nearest dollar
Question 4 く > You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 32.6 -1.6 25.1 22.9 29.3 0.8 Find the 80% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place). 80% C.I. =

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