4) A genius is defined as "at least three standard deviations above the mean." Your math teacherteaches 3 classes each semester, 2 semesters per year. On average, each class consists of 20random students. Therefore, over a 25-year career...a) How many "genius" math students can he expect to witness?b) Complete this sentence: About 1 in (round to the nearest integer, such as 8) teacherswitness exactly 3 genius students over his or her entire career.

Given that genius is "at least 3 standard deviations above mean".

Answered: A genius is defined as "at least three…

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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One year a survey asked a group of people from a certain country the following question, "How many cigarettes do you smoke a day?" Of the 830 people who responded, 7% reported having only 1 cigarette. Identify (a) the sample, (b) the population, and (c) the statistic reported. (a) What is the sample for this survey? O A. The sample is the 830 people who responded. B. The sample is the people in the particular country who did not respond. OC. The sample is the 7% who reported smoking only one cigarette. O D. The sample is the public in the particular country. (b) What is the population for this survey? O A. The population is the public in the particular country. O B. The population is the 7% who reported smoking only 1 cigarette. O C. The population is all of the people in the world. O D. The population is the 830 people who responded. (c) What is the statistic reported for this survey? statistic reported is percentage of respondents who reported smoking only 1 cigarette (7%). O B. The…
a.) The distribution of students' grades is _____ (select of one the following): (approximately normal, is exactly normal, may or may not be normal, is left skewed, is right skewed) b.) If n = 32 students are selected at random, the distribution of the sample mean grade is ______ (select of one the following): (approximately normal, not normal, left-skewed, right-skewed) with a mean of ____ and a standard deviation of ______ c.) The probability that the sample mean grade for these 32 students is less than 64.0 is _______?
You are interested in the development of language in bilinguals. You are able to locate five families in the world with 18-month-old toddlers who are learning both Japanese and Amharic simultaneously. Given that these are the only families that fit this qualification, therefore, these five families are your study population. You test the children to see how many words they can speak in Japanese. The results are listed in the following table: Toddler A P Calculate the mean for this population. B Complete the following table. UO B C Toddler Number of Words (X) 26 48 37 28 с D E D Number of Words in Japanese 26 48 37 28 41 E 41 X-p (x-μ)² Calculate the variance and standard deviation for this population.
1. The ages of all males from the freshmen students in the University of Santo Tomas is a/an ___________. a. frequency b. sample c. statistic d. population 2. If the probability of a defective bolt is 0.1, determine the mean for the number of defective bolts in a total of 400 bolts. Is the answer 40?
In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(P >0.84), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 X
B. What is the probability a sample of 90 test takers will provide a sample mean test score within 10 points of the population mean of 515 on the mathematics part of the test. c. What is the probiotic a sample of 100 test takers will provide a sample mean test score within 10 points of the population mean of 494 on the writing part of the test.
Which of the following is most likely a population as opposed to a sample? A Every third person to arrive in the hospital B Registered nurses in 2007 © Respondents to a newspaper survey D First five nurses completing their duties
Problem Solving. Solve the following problems. No immediate rounding. Round off final answers to three decimal places. A protective enchantment which alerts the Charms professor when a death eater attacks a magical school is designed to have a 90% reliability rate. Suppose that the nine magical schools equipped with this enchantment experienced an attack from the death eaters. Define the random variable X as the number of Charms professors alerted out of nine. Assuming that protective enchantment alerts are independent 1. Write down the associated PMF of X. 2. Compute for the probability of alerting at least 7 Charms professors.
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A researcher collects data from six groups with four individuals in each group. If the means square between groups is 5.08, what is the value of the sums of squares between groups? Type your answer...
. A sample of 200 people was asked their favorite genre of music. Below are the results. Gender Rock Pop Hip-Hop Other Male 31 20 37 12 Female 17 30 19 34 If one of those people is randomly selected, find the probability that the person is a female or their favorite genre of music is Hip-hop. Round to three decimal places as needed. If one of those people is random selected, find the probability that the person’s favorite genre of music is Pop, given that the person is a male. Round to three decimal places as needed.

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