Decide which of the following statements are true.AnswerTablesKeyboaThe inflection points for any normal distribution are three standard deviations on either side of the mean.The mean of a normal distribution is always 0.The total area under a normal distribution curve with a standard deviation of 4 is the same as the area under a normal distribution curve with a standard dev12.O Normal distributions are always symmetric and bell-shaped.Submit Anst0ОС

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Answered: Decide which of the following…

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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The distribution of the number of hours that a random sample of people spend doing chores per week is shown in the pie chart. Use 32 as the midpoint for "30+ hours." Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Click the icon to view the pie chart. First construct the frequency distribution. Weekly study hours Class Frequency, f 0-4 5-9 0-4 hours (3 people) 10-14 5-9 hours (14 people) 10-14 hours (19 people) 15-19 15-19 hours (21 people) 20-24 20-24 hours (14 people) O 25-29 hours (13 people) 25-29 30+ hours (4 people) 30+ Print Done
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 71 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 61 miles per hour and 81 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately ________ % of vehicles travel between 61 miles per hour and 81 miles per hour.
Use the following frequency distribution table to find the value of the mean score. Scores Frequency1 - 3 54 - 6 17 - 9 3 Find the value of the standard deviation. Give your answer accurate to 1 place after the decimal point. σ =
The numbers of courses taught per semester by a random sample of university professors are shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. 25- 24 20- 17 16 15 10- 5- Number of courses taught per semester f 1 2 16 24 4 17 The sample mean is x = 2.9 (Round to one decimal place as needed.) The sample standard deviation is s = (Round to one decimal place as needed.) Number of professors
Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 57.4 degrees. The mean of the frequency distribution is (Round to the nearest tenth as needed.)
Determine whether the statement is true or false. If it is false, rewrite it as a true statement. As the size of a sample increases, the standard deviation of the distribution of sample means increases. Choose the correct choice below. C OA. This statement is false. A true statement is, "As the size of a sample increases, the standard deviation of the distribution of sample means decreases." OB. This statement is true. OC. This statement is false. A true statement is, "As the size of a sample decreases, the standard deviation of the distribution of sample means decreases." OD. This statement is false. A true statement is, "As the size of a sample increases, the standard deviation of the distribution of sample means does not change." Time Remaining: 01:26:37
Fill in the Blanks: Applying Chebyshev's Rule to this distribution, we estimate that 75% or more of women with metastatic breast cancer will survive between __________ and __________ years (2 standard deviations from the mean).
The distribution of the number of hours that a random sample of people spend doing chores per week is shown in the pie chart. Use 32 as the midpoint for "30+ hours." Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. W Click the icon to view the pie chart. First construct the frequency distribution. Weekly study hours Class Frequency, f 0-4 I 0-4 hours (4 people) 5-9 1 5-9 hours (12 people) O 10-14 hours (23 people) O 15-19 hours (21 people) O 20-24 hours (16 people) O 25-29 hours (14 people) O 30+ hours (5 people) 10-14 15-19 20-24 25-29 30+ Print Done OOOOD OD
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In a normal distribution, a data value located 0.9 standard deviations below the mean has Standard Score: In a normal distribution, a data value located 2.1 standard deviations above the mean has Standard Score: In a normal distribution, the mean has Standard Score: z = Question Help: D Video Submit Question
The numbers of courses taught per semester by a random sample of university professors are shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Make a frequency distribution for the data. X 1 3 f Number of professors 25- 20- 15- 10- 4 20 23 15 1 2 3 4 Number of courses taught per semester
The frequency distribution below represents frequencies of actual low temperatures recorded during the course of a 31-day month. Use the frequency distribution to construct a histogram. Do the data appear to have a distribution that is approximately normal? Class Frequency A 39-44 1 B 45-50 1 AT C 51-56 5 D 57-62 13 E 63-68 8 F 69-74 1 G 75-80 2 Choose the correct histogram below. OA. ABCDEFG O C. 10- ABCDEFG B. Yes, it is approximately normal. C. No, it is not at all symmetric. OD. No, it is completely erratic. B. 10- 0- d. ABCDEFG O D. 10- 0 J ABCDEFG Do the data appear to have a distribution that is approximately normal? OA. No, it is approximately uniform.

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