When appropriate, please indicate if you used old-school tables, your calculator, Python, etc 2. In a random sample of 91 college students, the average number of Discord messages handled inone day is 216. The 90% confidence interval for the mean number of messages handled by studentsdaily is given as 210 to 222.a. What is the population standard deviation?b. If the number of samples were doubled, what would be the new confidence interval (keepingthe same confidence level?)

The sample size: The sample mean: The confidence level: The confidence interval for the mean number…

Answered: 2. In a random sample of 91 college…

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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Several years ago, the Arcadia school system was criticized because the average Arcadia High School graduate could read at only the ninth-grade level. After this report was made, a special reading program was established to upgrade skills. The AHS principal wants to know if the reading program worked. If it has, he will request that an accreditation team visit the school. If the program has not improved the reading level to at least 10.0 (sophomore level), the administrator would like to avoid the embarrassment of a poor review. To determine the average reading level of the senior class, we select ten seniors at random. We assume that reading scores are normally distributed. The reading scores for the ten seniors are shown in Table 1. Table 1: Reading Scores for Sample High School Seniors Student Reading Score 1 13.4 2 12.1 3 11.4 4 10.6 5 10.3 6 10.2 7 9.8 8 9.7 9 9.4 10 8.6 Calculate the sample mean…
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