Basic Math question and answers for September 06, 2024
- Q For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. Asurvey was done on 21 students, and the distribution of total study hours...
- Q Google it: According to a report of the Nielsen Company, 86% of internet searches used the Google search engine. A sample of 100 searches is studied.Use the Cumulative Normal Distribution...
- Q The lengths of adult males' hands are normally distributed with mean 188 mm and standard deviation is 7 mm. Suppose that 42 individuals are randomly chosen. Round z-scores to 2...
- Q A Food Marketing Institute found that 26% of households spend more than $125 a week on groceries. Assume the population proportion is 0.26 and a simple random sample of 192...
- Q Which is better, a score of 92 on a test with a mean of 71 and a standard deviation of 15, or a score of 688 on a test with...
- Q Taxes: The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4900,The IRS plans to draw...
- Q (a) Approximate the probability that 71 or more have hypertension.The probability that 71 or more have hypertension is approximately.
- Q Google it: According to a report of the Nielsen Company, 82% of internet searches used the Google search engine. A sample of 100 searches is studied.Use the Cumulative Normal Distribution...
- Q A local bank began charging $3.40 each month for returning canceled checks. The bank also has an $8.10 "maintenance" fee if a checking account slips below $750.00. Donna Sands likes...
- Q In an effort to cut costs and improve profits, any US companies have been turning to outsourcing. In fact, according to Purchasing magazine, 54% of companies surveyed outsourced some part...
- Q Select the correct answer from each drop-down menu.A comic-strip writer churns out different numbers of comic strips each day. The writer logged the number of comic strips he wrote each...
- Q A group of high school students took an SAT Exam. Suppose the distribution is exactly Normal with the mean of the SAT scores of 1465 and a standard deviation of...
- Q Compare the 3 data sets:Data A: 34, 52, 72, 85, 62Data B: 10, 11, 9, 8, 10Data C: 190, 185, 194, 192, 186Which of the data sets has the smallest...
- Q Going to work: A news report stated that the mean distance that commuters in the United States travel each way to work is 15 miles. Assume the standard deviation is...
- Q A sample of size 20 will be drawn from a population with mean 7 and standard deviation 6.(a) Is it appropriate to use the normal distribution to find probabilities for...
- Q The measure of position called the midquartile of a data set is found using the formula Q? +Qz / 2. Find the midquartile of the given data set.22 36 48...
- Q Find the minimum payment on an unpaid balance of $1,191.74. Assume that the minimum payment on a credit card is the greater of $14 or 3% of the unpaid balance....
- Q For a production level of x units of a commodity, the cost function in dollars is C=200x +4100.The demand equation is p = 300 -0.05x. What price p will maximize...
- Q The average resting heart rate of a population is 88 beats per minute, with a standard deviation of 13 bpm. Find the z-scores that correspond to each of the following...
- Q Construct a frequency distribution and a frequency histogram for the data set using the indicated number of classes. Describe any patterns.Number of classes: 8Data set: Reaction times (in milliseconds) of30...
- Q Hilda is taking out an $11,000 personal loan that she will repay in 5 years. If she receives a 10% interest rate, her monthly payments will be $233.72. If she...
- Q A theater group sells tickets to a play. If an adult ticket costs $12.50 and a child ticket costs $8.75, then how much money will the group collect by selling...
- Q (a) Here are the prices (in thousands) for 10 houses for sale in a local neighborhood:$288, $292, $294, $296, $297, $298, $301, $302, $304, $312.Which measure should be used to...
- Q The data represent the time, in minutes, spent reading a political blog in a day. Construct a frequency distribution using 5 classes. In the table, include the midpoints, relative frequencies,...
- Q A music teacher would like to find the mean number of songs people listen to on the way home from work. She collects data from 18 teachers at the school....
- Q In a survey of 50 thousand people, 35 thousand stated they like to eat macaroni and cheese.a. What percentage of the people surveyed like to eat macaroni and cheese?b. Suppose...
- Q There are many cell phone case options on the market. This discretionary item comes in a variety of colors, materials, thicknesses, protection levels, and more. Amit runs a small business...
- Q Under his cell phone plan, Alexander pays a flat cost of $69.50 per month and $5 per gigabyte. He wants to keep his bill under $85 per month. Write and...
- Q Salaries for the research and development department of Richman Chemical are given as$48,397; $27,982; $42,591; $19,522; $32,400; and $37,582.Find the mean rounded to the nearest whole dollar.$34,746$32,400Doesn't exist$34,991
- Q How does smoking marijuana affect willingness to work? Canadian researchers persuaded young adult men who used marijuana to live for 98 days in a "planned environment." The men earned money...
- Q The normal monthly precipitation at the Seattle-Tacoma airport can be approximated by the model shown below, where R is measured in inches and t is the time in months, with...
- Q Vegan Thanksgiving: Tofurkey is a vegan turkey substitute, usually made from tofu. At a certain restaurant, the number of calories in a serving of tofurkey with wild mushroom stuffing and...
- Q An assembly consists of two mechanical components. Suppose that the probabilities that the first and second components meet specifications are 0.98 and 0.85, respectively. Let X be the number of...
- Q Electric bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011was $109.99. Assume the amounts are normally distributed with standard deviation...
- Q Tree heights: Cherry trees in a certain orchard have heights that are normally distributed with mean = 112 inches and standard deviation a= 10 inches. Usethe Cumulative Normal Distribution Table...
- Q Your monthly living expenses are $1400 and your monthly income is $1525. Your goal is to have an emergency fund of 5 times your monthly living expenses. Your emergency fund...
- Q This stem-and-leaf plot shows the number of triples (when the batter reaches third base) each American League team had scored by midseason, 1999. How many teams had at least 10...
- Q The following are sample prices of houses in a particular neighborhood.Data (in thousands of dollars): 250, 321, 223, 298, 305, 217a) Find the Mean, Variance and Standard Deviation of the...
- Q Pablo takes classes at both Westside Community College and Pinewood Community College. At Westside, class fees are $98 per credit hour, and at Pinewood, class fees are $115 per credit...
- Q Tania is reconstructing her expenses for the past two weeks. Her records of her expenses is shown. Tania's bank statement says that she has an ending balance of $85. What...
- Q (a) Find the area under the standard normal curve that lies between z=0.27 and z=1.07.The area between z=0.27 and z= 1.07 is
- Q Suppose that 75% of students have taken statistics. We survey 15 students and ask them if they have taken statistics. Let X be the random variable that counts how many...
- Q In a country, the mean time served by prisoners released from prison for the first time is 35.1 months. Assume the standard deviation of the times served is 17.3 months....
- Q The following data are the distances between a sample of 20 retail stores and a large distribution center. The distances are in miles.29; 31; 36; 40; 58; 67; 68; 69;...
- Q Mark's morning class scored an average of 89.25 points across 4 tests. His evening class scored an average of 94.50 points across 4 tests. What was the average test score...
- Q Stories in the World's Tallest Buildings The number of stories in each of a sample of the world's 24 tallest buildings follows. Construct a grouped frequency distribution and a cumulative...
- Q Write a program that analyzes a year's worth of rainfall data. The program should accept the total rainfall for each of 12 months from the user and store it in...
- Q When a drug such as a pain killer or an antibiotic is introduced into the body, the kidneys work to eliminate the drug. Assume that after an hour, 35 percent...
- Q A study of life expectancy showed that a random sample of 6 states had a standard deviation of 0.4 deaths per year. Find the 99% confidence intervals of the variance...
- Q Due to temporary tax cuts in 2010, a person with typical deductions earning $50,000 per year would have saved 2% of their income plus $850 in federal taxes. Use this...
- Q This question refers to data taken from the U.S. Census. The dollar values take into account the changes in the economy over the years (i.e., inflation). Inflation is a complicated...
- Q People who are severely obese (BMI ?40) are at most risk for serious health problems, which are the most expensive to treat. The percent of people in a country who...
- Q What is the maximum length of a whisker in a modified box plot where the median = 120, Q1 = 100, Q3= 150, the minimum = 20, and maximum =...
- Q The number N (in billions) of debit card transactions can be approximated by the equation N= 3.2x+8.8, where x is the number of years since 2000. In what year were...
- Q The formula S=C(1+r) can be used to calculate how many years, t, it will take the price of a loaf of bread to increase from C dollars to S dollars...
- Q You have a distribution summarizing the number of days in the past two months (60 days) that an individual watched TV. The median number of days = 25, the lower...
- Q An Early Childhood Education student is doing a report on how many children aged 2 know their colors. The student collected a random sample of 50 children of age 2...
- Q Looking at the box-an-whisker plot for the package weight data below, what does the position of the median line in the box and the length of the whiskers tell you...
- Q The army reports that the distribution of waist sizes among female soldiers is approximately normal, with a mean of 28.4 inches and a standard deviation of 1.2 inches. Part A:...
- Q A firm producing plate glass has developed a less-expensive tempering process to allow glass for fireplaces to rise to a higher temperature without breaking. To test it, five different plates...
- Q A study examined the effect of garlic on blood cholesterol levels. A total of 192 subjects with starting low-density lipoprotein, LDL, cholesterol, "bad cholesterol", levels between 130 and 190 mg/dl...
- Q Watch the video that describes modeling Medicare spending with a linear function. Click here to watch the video. In 1992, the life expectancy of males in a certain country was...
- Q The following are amounts of M&M's found in a sample of 10 mini packages:13, 15, 17, 16, 13, 14, 12, 19, 13,15i) Find the Median of the data: 14.5ii) Which...
- Q If we draw the probability density histogram for x where:x = 5, 5, 3, 6, 6, 6, 9, 10class start = 2.5class width=2what is the probability density of the class:...
- Q Find the value of an investment of $10,000 for 13 years at an annual interest rate of 3.85% compounded continuously.The value of the investment is $
- Q The data set represents the number of pages in the last book read by each of 20 students over the summer.163, 170, 171, 173, 175, 205, 220, 220, 220, 253,...
- Q Each set of data was collected from surveys to answer statistical questions. Select all of the data sets that represent numerical data.A. {1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.8, 1.9,...
- Q A certain fuel-efficient hybrid car gets gasoline mileage of55.0 mpg (miles per gallon). (a) If you are driving this car inEurope and want to compare its mileage with that of...
- Q Which representation is most helpful for answering thequestion:Are more Best Film finalists shorter than 130 minutes orat least 130 minutes long?
- Q Teachers' Salaries The average annual salary for all U.S. teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find these probabilities of the earnings...
- Q Using the accompanying table of data, blood platelet counts of women have a bell-shaped distribution with a mean of 255.1 and a standard deviation of 65.5. (All units are 1000...
- Q In a study of the function of pectoral fins in fish, a graduate student examined 7 fish with the given lengths (in centimeters, cm).30 28 29 27 31 25 29What...
- Q On its website, the Washington Post dedicates a page to explaining its survey response rates. A September 2005 monthly political survey received complete responses from 1201 American adults, representing approximately...
- Q A study in El Paso, Texas, looked at seat belt use by drivers. Drivers were observed at randomly chosen convenience stores.After they left their cars, they were invited to answer...
- Q There are three children in a room, age 3, 4, and 5. What will happen to the mean and variance of the ages if a 4-year-oldchild enters the room?The mean...
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