Because of the relatively high interest rates, mostconsumers attempt to pay off their credit cardbills promptly. However, this is not alwayspossible. An analysis of the amount of interestpaid monthly by a bank's Visa cardholdersreveals that the amount is normally distributedwith a mean of 28 dollars and a standarddeviation of 7 dollars.A. What proportion of the bank's Visa cardholderspay more than 31 dollars in interest?Proportion = .666B. What proportion of the bank's Visa cardholderspay more than 39 dollars in interest?Proportion = 5.9C. What proportion of the bank's Visa cardholderspay less than 18 dollars in interest?Proportion = 0.076D. What interest payment is exceeded by only19% of the bank's Visa cardholders?Interest Payment =34%D

Answered: Image /qna-images/answer/10260fc4-2ef4-428c-b242-e77dac725bd3.jpg

Answered: Because of the relatively high interest…

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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Give the TI commands to find the mean, median, and standard deviation and compare to the original post when done by hand. Mean = 14.1 + 6.4 + 9.6 + 21.2 + 16.8 + 2.2 + 6.0 = 76.3 / 7 = 10.9in. Median = 2.2, 6.0, 6.4, 9.6, 14.1, 16.8, 21.2 = 9.6in. How can I find the mean and median on TI caculator?
Salaries for teachers in a particular elementary school district are normally distributed with a mean of $47,000 and a standard deviation of $4,600. We randomly survey ten teachers from that district. (Round your answers to the nearest dollar.)a. Find the 90th percentile for an individual teacher's salary b. Find the 90th percentile for the average teacher's salary.
In the 1992 presidential election, Alaska's 40 election districts averaged 1824 votes per district for President Clinton. The standard deviation was 573. (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 1824 a population mean or a sample mean? c. Find the probability that a randomly selected district had fewer than 1872 votes for President Clinton. d. Find the probability that a randomly selected district had between 1842 and 2091 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
The weights of 6 month-old girls in the United States are Normally distributed with a mean of approximately 16 pounds and a standard deviation of approximately 2 pounds. a. What percentage of 6 month-old girls do we expect to weigh between 15 pounds and 18 pounds? (To show your work: Write down which calculator/program you are using and what values you are entering into the calculator.) b. Find the cutoff weight value for the top 5% of weights for 6-month-old girls. (To show your work: Write down which calculator/program you are using and what values you are entering into the calculator.)
Based on data from the 2000 Census the average age of a Baldwin County, Alabama resident is 39 years with a standard deviation of 22. 6 . The data is normally distributed. The median age, in years, is: Group of answer choices 23 29 39 20
In the 1992 presidential election, Alaska's 40 election districts averaged 1993 votes per district for President Clinton. The standard deviation was 584. (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 1993 a population mean or a sample mean? Select an answer v C. Find the probability that a randomly selected district had fewer than 2053 votes for President Clinton. d. Find the probability that a randomly selected district had between 2074 and 2208 votes for President Clinton. e. Find the 95th percentile for votes for President Clinton. Round your answer to the nearest whole number.
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
1. According to one study, the average hours of sleep on a weeknight for men was 6.9 hours with a standard deviation of 1.5 hours. a. Find the proportion of men who sleep for more than 8 hours per night. b. Find the proportion of men who sleep for less than 6 hours per night. c. Find the proportion of men who sleep between 6-8 hours per night. d. Find the number of hours that represents the 90th percentile.
According to a government study among adults in the 25 to 34-year age group, the mean amount spent per year on reading and entertainment is $1,994. Assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $350. a. What percent of the adults spend more than $2,500 per year on reading and entertainment? b. What percent spend between $2,500 and $2,800 per year on reading and entertainment?
The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. According to the standard deviation rule, almost 2.5% of the students spent more than what amount of money on textbooks in a semester? A. O $195 B. $215 C. $235 D. $275 E. $295
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According to a recent survey, the salaries of assistant professors have a mean of $40,756 and a standard deviation of $7500 . Assuming that the salaries of assistant professors follow a normal distribution, find the proportion of assistant professors who earn more than $53,000 . Round your answer to at least four decimal places.

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