1. Suppose you have a confidence interval with a point estimate of 2.5 and a margin of errorof 0.06. Now suppose the margin of error increases to 0.15. What happens to the intervaland the accuracy of our estimate?A. The interval decreases and the accuracy of our estimate decreases.B. The interval decreases and the accuracy of our estimate increases.C. The interval inereases and the accuracy of our estimate decreases.D. The interval increases and the accuracy of our estimate increases.

We want to tell you which one is the correct choice.

Answered: 1. Suppose you have a confidence…

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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Solve its from frequency distribution and graphic presentations
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 75 and the standard deviation was 12. Use the "Empirical Rule", not a calculator or other technology. Do not round your answers. What is the approximate percentage of students who scored less than 51 on the test?%What is the approximate percentage of students who scored between 51 and 99 on the test?%What is the approximate percentage students who scored between 63 and 87 on the test?%What is the approximate percentage of students who scored between 75 and 87 on the test?%
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type. 11.8 6.3 8.1 6.5 7.9 6.8 7.4 7.3 7.2 9.7 6.8 7.7 9.0 7.8 7.0 5.9 9.7 10.7 8.0 11.6 7.7 8.7 6.3 8.7 7.3 11.3 7.0 (a) Calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [Hint: Ex, = 220.2.] (Round your answer to three decimal places.) MPa State which estimator you used. Os Ox O x Os/x O p (b) Calculate a point estimate of the strength value that separates the weakest 50% of all such beams from the strongest 50%. MPa State which estimator you used. Ox Os/x Os O p Ox (c) Calculate a point estimate of the population standard deviation o. [Hint: Ex² = 1868.08.] (Round your answer to three decimal places.) MPa Interpret this point estimate. O This estimate describes the bias of the data. O This estimate describes the center of the data. O This estimate describes the spread of the data. O This estimate describes the…
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 71 and the standard deviation was 13. 32 45 97 110 58 71 84 Distribution of Test Scores Q What is the approximate percentage of students who scored less than 45 on the test? What is the approximate percentage of students who scored between 71 and 84 on the test? What is the approximate percentage students who scored between 58 and 84 on the test? What is the approximate percentage of students who scored between 45 and 97 on the test?
Please help asap
Fitting a straight line to a set of data yields the prediction line Yi=2+4Xi. The values of X used to find the prediction line range from 2 to 28. c. Should this model be used to predict the mean value of Y when X equals 0? yes, no, not enough information ? d. Should this model be used to predict the mean value of Y when X equals 27? yes, no, not enough information?
Which of the following are true about the Z-score? Two answers correct. All or nothing credit. 1. It provides a sense of how far an observation is from the mean in relative to the standard deviation. 2. An observation is generally considered an outlier if its Z-score is more than 3 or less than -3. 3. The Z-score measures where the observations in a data set are scattered around. 4. A Z-score of -1 tells us that the average value of the data set is one standard deviations below the mean.
Solve the problems and show your complete solution. If the answer contains decimal, write up to 3 decimals. 1. The standard deviation on a final examination was 9, while the meangrade was 72. The best 14% of students are expected to achieve 15 or higher. What is the minimal grade required for a student to obtain 1.5 or higher?
2. You need to present data to your boss and an assistant gives you a scatter gram with random points. They do not seem to form a line but r = 0.95. You did not draw the graph or calculate r. You do have the original data in front of you and it is accurate. How would you handle the discrepancy between the scatter gram and value for r?
Areas Under the One-Tailed Standard Normal Curve This table provides the area between the mean and some Z score. 0=1 For example, when Z score=1.45 the area = 0.4265. 0.4265 Z Z 0.00 0.01 0.02 0.06 0.09 0.05 0.0199 0.0239 0.0000 0.0040 0.0359 0.0080 0.0478 0.0517 0.0398 0.0438 0.03 0.04 0.0120 0.0160 0.0557 0.0948 0.0987 0.1026 0.1331 0.0596 0.0636 0.0753 0.0793 0.0832 0.0871 0.0910 0.1103 0.1141 0.1179 0.1217 0.1255 0.1293 0.1064 0.1368 0.1406 0.1443 0.1808 0.1480 0.1517 0.1554 0.1591 0.1628 0.1664 0.1700 0.1736 0.1772 0.1844 0.1879 0.1915 0.1950 0.1985 0.2019 0.2054 0.2088 0.2123 0.2157 0.2190 0.2224 0.2257 0.2291 0.2324 0.2357 0.2454 0.2486 0.2517 0.2549 0.2580 0.2611 0.2642 0.2673 0.2704 0.2764 0.2794 0.2823 0.2852 0.2734 0.3023 0.3051 0.3078 0.3106 0.2881 0.2910 0.2939 0.2967 0.2995 0.3133 0.3159 0.3186 0.3212 0.3238 0.3264 0.3289 0.3315 0.3340 0.3365 0.3389 0.3413 0.3438 0.3508 0.3554 0.3577 0.3599 0.3621 0.3643 0.3665 0.3686 0.3790 0.3810 0.3830 0.3708 0.3729 0.3907 0.3925…
Solve parts d and e please

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