Q. 2.Suppose Country B's government now reports that its population mean disposablehousehold income is $1,000 per month, with a standard deviation of $150. Country A'spopulation mean is $1,100, with a standard deviation of $310.a.b.Which country has more variation in income? Explain using popular phrases,such as "gap between rich and poor."Each country defines the poverty level to be $755. If you assume that incomehas a normal distribution, find the probability that a household's income is belowthe poverty level ini. Country Aii. Country BDoes it seem reasonable to assume a normal distribution? In general, is incomesymmetric or skewed?

Answered: Image /qna-images/answer/e958592e-a7bd-4869-bdf7-01491b677d5d.jpg

Answered: Q. 2. Suppose Country B's government…

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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II. Refer to the problem below. Show complete solutions. Box and label your final answers. The systolic blood pressure (given in millimeters) of females has an approximately normal distribution. 95% of the female students in a school have a systolic blood pressure between 97 mm and 153 mm. 1. Determine the mean. 2. Determine the standard deviation
A team of ten (10) construction workers who are working on a project are classified according to the skill levels, Classes A to D. The table below shows the number of workers in each of the four (4) classes and their respective hourly pay-rate. Pay-rate (Rands/hour) Number of workers Class A 80 Class B 60 Class C 55 Class D 50 4. Calculate the mean hourly pay-rate for the 10 workers. A. R24.50/hour B. R57/hour C. R57.50/hour D. R61.75/hour
A variable is normally distributed with a mean of 15 and a standard deviation of 4. a. Find the percentage of all possible values of the variable that lie between 10 and 23. b. Find the percentage of all possible values of the variable that are at least 7. c. Find the percentage of all possible values of the variable that are at most 8.
1. IQ scores have a mean of 100 and a standard deviation of 16. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score. a. b. If we consider "usual IQ scores to be those that convert z scores between -2 and 2, is Einstein's IQ usual or unusual? C. The organization MENSA, which calls itself the "high IQ society", requires a score of 130 or higher. What percent of adults would qualify for membership? 2. In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The responses were normally distributed, with a mean of 5.4 and a standard deviation of 2.2. Find the probability that a randomly selected study participant's response was: a. Less than 4 b. Between 4 and 6 c. More than 8 3. The red blood cell count for a population of adult males can be approximated by a normal distribution, with a mean of 5.4 million cells…
a. Construct a grouped frequency distribution, with percent frequencies. Copy the table to Microsoft Word and Describe the distribution. o. Suppose the lengths of time taken to find a full-time job by economics majors have a coefficient of variation of 24%. Is the variability in times for CS majors BIGGER/SMALLER/SAME? If different, by how much? c. Would a column chart be a more appropriate representation of unemployment duration than a histogram? Provide one reason. Time 10 3 12 21 15 8 4 2 16 8 8 14 33 7 24 11 42 15
PLS. Solve Quickly Applications Problems According to a Sallie Mae survey and credit bureau data, in 2008, college students carried an average of $3173 debt on their credit cards (USA TODAY, April 13, 2009). Suppose that cur- rent credit card debts for all college students have a normal distribution with a mean of $3173 and a standard deviation of $800. Find the probability that credit card debt for a randomly se- lected college student is between $2109 and $3605.
1. The position number w(letter) tells us where in the alphabet the given letter is located. For instance: w("b") = 2. Find the mean, median and population standard deviation for the vowel position numbers in the English alphabet.
please answer 4 and 5
10. On a history exam, Roberto had a score of 72, which was exactly 3 standard deviations below the mean. The standard deviation for the exam is 4. a. What score was 2 standard deviations above the mean? b. What percent of the scores were at least 88? 72 c. What score represents the mean? d. What percent of the scores were between 80 and 88?
Which is the largest with regard to the following data set: the range or the standard deviation? 11 11 12 12 12 12 13 15 17 22 22 22 Standard Deviation Range
3. ACT scores are roughly Normal with mean 20.8 and standard deviation 4.8, and SAT scores are roughly Normal with mean 1026 and standard deviation 209. Some students take both. For those students, the correlation between the two scores is 0.72. a. What's the equation of the straight line that you'd use to predict ACT scores based on SAT scores? b. I got a 1300 on the SAT, and I'm planning to take the ACT. Predict what I might get, c. What's the equation of the straight line that you'd use to predict SAT scores based on ACT scores? d. My friend got a 27 on the ACT, and she's planning to take the SAT. Predict what she might get. e. How come you're predicting both that I'll do worse than her on the ACT and that she will do worse than me on the SAT? 4. Draw a simple random nlc of size 15 from the labels 40os01, 402.
Calculate following?

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