Suppose that the same sample dataset of July 1 temperatures consisted of 64observations and that these 64 cases had a mean of 21°C with a standard deviationof four degrees. Using the same z = 2.33, what are the upper and lower bounds,rounded to three digits?O 19.83 - 22.1718.67 - 23.3317.76 - 24.24O 20.50 - 21.5020.36 - 21.64

Answered: Image /qna-images/answer/349f295c-7eaf-4721-8e4f-3f61bf925ee3.jpg

Answered: Suppose that the same sample dataset of…

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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Suppose the scores of students on an exam are Normally distributed with a mean of 522 and a standard deviation of 83. Then approximately 99.7% of the exam scores lie between the numbers such that the mean is halfway between these two integers. and ☐
Suppose that the lengths of human pregnancies are normally distributed with a mean of 267 days and a standard deviation of 16 days. Complete the following statements. (a) Approximately ? of pregnancies have lengths between 219 days and 315 days. (b) Approximately 95% of pregnancies have lengths between I days and days.
n a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 21 scores from all of the students who took the test. She sees that the mean score is 128 with a standard deviation of 41.4416. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 25. Is there evidence that the standard deviation of test scores has increased at the α=0.005 level? Assume the population is normally distributed. Step 1 of 5 : State the null and alternative hypotheses. Round to four decimal places when necessary.
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