Answered: In what way can probability or…

In what way can probability or proportion be represented in terms of the distribution? Standard deviation None of these Z-score F-statistic

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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Question: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. The Regular People Club does not accept people with IQs lower than 85 or higher than 115, How many people in a group of 400 would you expect to be refused membership in the club? please show all steps.
z-Scores and Area under the CurveA researcher collected data on adults using an intelligence test. The data for these adults were approximately normally distributed with the following mean and standard deviation mean = 102pointsstandard deviation = 13points Use this information and the online normal distribution calculator to answer the questions below. Round your percents to two decimal places. Note: Use z-scores rounded to 2 decimal places and the standard normal distribution to avoid roundoff errors.Normal CalculatorIf an adult is randomly selected from the study, what is the probability the adult scored between 113points and 125points? ______%If an adult is randomly selected from the study, what is the probability the adult scored less than 110.7points? %If an adult is randomly selected from the study, what is the probability the adult scored more than 127.7points? _______%If an adult is randomly selected from the study, what is the probability the adult scored less than 67.4points…
Question Help ▼ A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 7 cars has a mean gas mileage of 20 mpg and a standard deviation of 3 mpg. At a= 0.025, test the company's claim. Assume the population is normally distributed. Click here to view the t-distribution table Click here to view page 1 of the normal table Click here to view page 2 of the normal table Which sampling distribution should be used and why? O A. Use a t-sampling distribution because the population is normal, and o is unknown. O B. Use a t-sampling distribution because the population is normal, and o is known. C. Use a normal sampling distribution because the population is normal, and o is unknown. O D. Use a normal sampling distribution because n> 30 E. Use a t-sampling distribution because n 21 H, u#21 What is the value of the standardized test statistic? The standardized test statistic is…
Which measure of central tendency can be used to describe a distribution at any level of measurement (nominal, ordinal, or interval)? standard deviation median mean mode
Population (N) Mean (95% CI) Median Mode Standard Deviation Managers (21) 60.52 (4.23) 60 70 9.28 Employees (29) 52.79 (5.90) 57 68 15.52 What do the mean, median, mode, and standard deviation tell us about the managers and employees?
Interval Freq 0 - 9 6 10 - 19 12 20 - 29 16 30 - 39 11 40 - 49 5 Calculate the mean and standard deviation for the table of sample data above.
The Normal Distribution The average bmi (body mass index) of 500 college students is 25, with a standard deviation of 5. (A) How many students have a bmi between 22 and 29? (B) How many students have a bmi of more than 29? (C) How many students have a bmi of less than 22? (D) What level of bmi would put you in the bottom 10% of the weight distribution? Top 10%?
Vehicle speed on a particular bridge in China can be modeled as normally distributed. USE SALT (a) If 5% of all vehicles travel less than 39.13 m/h and 10% travel more than 73.25 m/h, what are the mean and standard deviation of vehicle speed? (Round your answers to three decimal places.) mean 194.55 standard deviation 94.78 X X (b) What is the probability that a randomly selected vehicle's speed is between 50 and 65 m/h? (Round your answer to four decimal places.) 0.6576 X (c) What is the probability that a randomly selected vehicle's speed exceeds the speed limit of 70 m/h? (Round your answer to four decimal places.) You may need to use the appropriate table in the Appendix of Tables to answer this question.
Scores obtained by students in an advanced placement test has a symmetric mound shaped (bell shaped) distribution with a mean of 70 and a standard deviation of 10. What is the proportion of students who received between 60 and 80 points. not enough information about 68% about 99.7% about 95%
Coefficient of variation of two distributions are 60 and 70, and their standard deviation are 21 and 16 respectively. What are their arithmetic means? (a) 35,20 (c) 30, 22.85 (b) 35,22.85 (d) 30, 20
What happens to the 'mean' of an x-distribution when you standardize the distribution? Z-scores are also known as _______?______ . standard deviations means error ranges
With the data for Statistics students' heights, do the following: 56 69 67 65 65 66 67 62 71 64 63 65 67 70 63 64 64 64 66 65 62 65 64 66 67 68 62 68 61 64 65 64 60 62 64 68 72 61 54 53 63 62 70 64 65 69 71 60 60 66 60 64 68 60 66 73 66 66 70 60 62 61 Upload your photo or screenshot of the histogram of this data. Choose File No file chosen I= S= IQR = 70 The 15th percentile is The 85th percentile is Median is Hint