The mean of these 20 average scores is 21.33 and the standard deviation is 1.94. Could the 68-95-99.7 Rule be used togive an interval that you would expect to contain approximately the middle 95% of average scores for all of the region'sschools? If so, what is that interval? If not, explain why not.Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.A. Yes, because a Normal model is appropriate for this situation. The interval is(Type your answer in interval notation. Type integers or decimals rounded to two decimal places as needed.)O B. No, because a Normal model is not appropriate for this situation.

The random sample of size, The mean of the distribution, The standard deviation of the distribution,…

Answered: The mean of these 20 average scores is…

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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In the 1992 presidential election, Alaska's 40 election districts averaged 2038 votes per district for President Clinton. The standard deviation was 576. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(,)b. Is 2038 a population mean or a sample mean? Select an answer Population Mean Sample Mean c. Find the probability that a randomly selected district had fewer than 1842 votes for President Clinton. d. Find the probability that a randomly selected district had between 1997 and 2099 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
22 Michael took 12 tests in his math class. His lowest test score was 78. His highest test score was 98. On the 13th test, he earned a 64. Select whether the value of each statistic for his test scores increased, decreased, or could not be determined when the last test score was added. Standard Deviation Median Mean Increased Decreased Could Not Be Determined acer % & 8
n the 1992 presidential election, Alaska's 40 election districts averaged 2111 votes per district for President Clinton. The standard deviation was 551. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(,)b. Is 2111 a population mean or a sample mean? Select an answer Population Mean Sample Mean c. Find the probability that a randomly selected district had fewer than 2134 votes for President Clinton. d. Find the probability that a randomly selected district had between 2048 and 2241 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
In Statsville there’s a city-wide speed limit of 30 mph.If you are caught speeding the fine is $100 plus $10 forevery mile per hour you were over the speed limit. Forexample, if you’re ticketed for going 45 mph, your fine is100 + 10145 - 302 = +250. Last month all the driverswho were fined for speeding averaged 42 mph with astandard deviation of 7 mph. What were the mean andstandard deviation of the fines?A) $120 and $70 B) $220 and $7C) $220 and $70 D) $220 and $170E) $420 and $70
STATISTICS. Show necessary and complete solutions. Box your final answer. 1. A 15-item quiz were given to the students who were absent on the actual day of the quiz. Those students got 4, 4, 5, 6, 9, 9, 9, 12, 13, 14 and 14. Find the range, mean, median, mode, standard deviation, and variance of this ungrouped data.
3. Using the two tables of output below, write three summary statements in APA format. Be sure you report results such as Mean and SD in proper APA format. Coffee refers to the amount of money spent on coffee in the previous week, soda refers to the amount of money spent on soda in the previous week, and sleep refers to the average daily number of hours spent sleeping in the previous week. Descriptive Statistics Mean Std. Deviation coffee 7.5500 9.62166 20 soda 6.1000 6.79706 20 sleep 7.2625 1.38001 20
Find the value of the standardized test statistic.
The 2004 Cincinnati Bengals scored 24, 16, 9, 17, 17, 23, 20, 26, 17, 14, 58, 27, and 28 points in their first 13 games. 2. Find the mean and the standard deviation of 3. Remove the lowest score from the data set. the data. Then find the mean and standard deviation of the new data. 4. How do the standard deviation and mean change when you remove the lowest number? Why do you think this is?
n a Mathematics test, the mean is �=89.00 and the standard deviation �=5. What is the z-score for your score �=96
In the 1992 presidential election, Alaska's 40 election districts averaged 1989 votes per district for President Clinton. The standard deviation was 568. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places. a. What is the distribution of X? X ~ N( __ , __ ) b. Is 1989 a population mean or a sample mean? Select an answer _______. c. Find the probability that a randomly selected district had fewer than 2087 votes for President Clinton. _____ d. Find the probability that a randomly selected district had between 1905 and 2194 votes for President Clinton.______ e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number. ______
NEED HELP WITH: A,B,C please thanks
please solve : B, C, and D ch 9

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