An educational psychologist is studying two methods of tutoring young children: Method A and Method B. She wants to test whether there is any difference inpuzzle solving skills between children tutored by one method versus children tutored by the other. Independent samples of 11 children who were tutored usingMethod A and 12 children who were tutored using Method B were chosen at random. The Method A children took a mean of 30 minutes to solve a certainpuzzle with a standard deviation of 7 minutes. The Method B children took a mean of 41 minutes to solve the same puzzle with a standard deviation of 3minutes. Assume that the two populations of completion times are normally distributed and that the population variances are equal. Construct a 90%confidence interval for the difference H₁-H₂ between the mean puzzle-solving times for Method A children (H₁) and for Method B children (H₂). Then find thelower limit and upper limit of the 90% confidence interval.!✓ 11Carry your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list offormulas.)F1QLower limit:Upper limit:Check@2*:F2WTI-84 Plus CEPYTHONAT AUTO REAL DEGREE MP2-SampTTestata Stats98193861920430455027675842 42Yes#380F3EX$4dF4RSF%do L5V↓FSTG< 6MacBook AirCF6YB&M7HF7Save For LaterSubmit Assignment© 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | AccessibilityUN* CO8PIIF8-(9JKMF90<Iдв)。.0LF10Pcommand-^....F11{00Boption+ 11[2.1114)F12}1

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Answered: lower limit and upper limit of the 90%…

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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Using the same sample data to compute each of the listed confidence intervals, which one of the following confidence intervals for a population mean will have maximum width? O 95% confidence interval O 90% confidence interval 99% confidence interval O 80% confidence interval
Construct a 90% confidence interval to estimate the population mean using the data below. What assumptions need to be made about this population? x=38 s=9.9 n=24 Click here to view page 1 of the critical t-score table. Click here to view page 2 of the critical t-score table. Question content area bottom Part 1 The 90%confidence interval for the population mean is from a lower limit of here to an upper limit of (Round to two decimal places as needed.) Part 2 What assumptions need to be made about this population? A. The population distribution is skewed to one side. B. The population size is larger than 30. C. The population follows the Student's t-distribution. D. The population follows the normal probability distribution.
If n=520 and ˆpp^ (p-hat) = 0.4, construct a 98% Confidence Interval.In order to use technology, you need to compute the number of successes:x = n*ˆpp^Give your answers to three decimals. ________< p < __________
Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many grade-point averages must be obtained so that the sample mean is within 0.005 of the population mean? Assume that a 95% range 4-0 confidence level is desired. If using the range rule of thumb, o can be estimated as =1. Does the sample size seem practical? 4 4
A magazine publisher wishes to determine what proportion of current subscribes will renew. The publisher selects a random sample of 200 subscribers and finds that 108 plan to renew. Assume you have the 99% confidence interval for this. Interpert the confidence interval
Use the sample data and confidence level given below to complete parts (a) through (d). A drug is used to help prevent blood clots in certain patients. In clinical trials, among 4321patients treated with the drug, 148 developed the adverse reaction of nausea. Construct a 95% confidence interval for the proportion of adverse reactions. a) Find the best point estimate of the population proportion p. ______________ (Round to three decimal) b. identify the value of the margin of error E E=______________ c. construct the confidence interval _____<p<________ d. write a statement that correctly interprets the confidence interval.
Determine the confidence level. Determine the confidence level for confidence interval shown in the figure below. 5-10 =.10 98% 95% 90% 80% arch Cc F2 F3 F4 F5 F6 F7 F8 F9 F10 & 4. 5 * 00 %#3
Two intervals are given, A and B, for the same value of the explanatory variable. A: 11 to 17; B: 8 to 20; (a) Which interval is the confidence interval for the mean response?A or B Which interval is the prediction interval for the response?A or B (b) What is the predicted value of the response variable for this value of the explanatory variable?Enter the exact answer.The predicted value is=
If n=15n=15, ¯xx¯=43, and s=20s=20, construct a confidence interval at a 90% confidence level. Give your answers to one decimal place. _____< μ < _____ Technology
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lower limit and upper limit of the 90% confidence interval. nal places (If necessary, consult a list of Di