Basic Math question and answers for August 29, 2024
- Q Heart Rates For a certain group of individuals, the average heart rate is 70 beats per minute. Assume the variable is normally distributed and the standard deviation is 2 beats...
- Q Cheryl Wilcox is planning for her retirement, so she is setting up a payout annuity with her bank. She wishes to receive a payout of $1,800 per month for twenty...
- Q The data in a data set are normally distributed with a mean of 190 and a standard deviation of 20. Estimate the percent of the data that are less than...
- Q Commute Time to Work The average commute to work (one way) is 25 minutes according to the 2005 American Community Survey. If we assume that commuting times are normally distributed...
- Q Suppose you want to borrow $200,000 from the bank to buy a home and agree to repay the loan in 360 equal monthly payments, including all interest due. The bank...
- Q Suppose you decide to wait 5 years to save up before buying the house. You are able to put a down payment of $30,000 on the house, so that you...
- Q Which data set has a mean of 80, a median of 83, and a mode of 91?Set A 91, 91, 65, 68, 85, 86, 93, 56, 63, 74, 90Set B...
- Q Chris is enrolled in a college algebra course and earned a score of 260 on a math achievement test that was given on the first day of class. The instructor...
- Q A standardized measure of achievement motivation is normally distributed, with a mean of 35 and a standard deviation of 14.Higher scores correspond to more achievement motivation.2.5% of the students scored...
- Q A normal distribution of scores has a standard deviation of 10 and a mean of O. Find the z-scores corresponding to each of the following values:a) A score that is...
- Q A total of 443,818 students at 699 community colleges in 48 states completed the Community College Survey of Student Engagement (CCSSE) between 2009 and 2011. About half (52%) of students...
- Q Prison Sentences The average prison sentence for a person convicted of second-degree murder is 15 years. If the sentences are normally distributed with a standard deviation of 2.1 years, find...
- Q A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution. Identify...
- Q Many people believe that the average number of Facebook friends is 120. The population standard deviation is 38.3. A random sample of 31 high school students in a particular county...
- Q An automobile tyre manufacturer is comparing the tread life of its new tyres to the tread life of its previous model to see if they last significantly longer.The values below...
- Q Data showing the number of releases for each movie studio in a year and the gross receipts are shown below. Based on this data, compute the value of the correlation...
- Q In a survey of 2262 adults, 742 say they believe in UFOs.Construct a 99% confidence interval for the population proportion of adults who believe in UFOs.A 99% confidence interval for...
- Q A group of friends compares what they received while trick or treating. They find that the average number of pieces of candy received is 43, with a standard deviation of...
- Q A study shows that at a particular convenience store, there is a strong positive correlation between the chance of rain in the forecast and the sale of umbrellas. What can...
- Q Leyla wants to test the hypothesis that thegrade obtained in Maths is independent ofthe grade obtained in Sport. She carries outthe x test at 10% significance level anddetermines that the...
- Q A statistician is studying the correlation between two variables and discovers a correlation coefficient of -0.15. Which best describes the correlation between the two variables?The variables have a strong, negative...
- Q Hospital Noise Levels For a sample of 5 operating rooms taken in a hospital study, the mean noise level was 42.8 decibels and the standard deviation was 12. Find the...
- Q Ruth wants to test the hypothesis thatfavorite car color is independent of gender.She carries out the x test at 5% significancelevel and determines that the x test statisticis 4.31 and...
- Q A random sample of 30 college students is selected. Each student is asked how much time he or she spent on homework during the previous week. The following times (in...
- Q Thunderstorm Speeds A meteorologist who sampled 14 thunderstorms found that the average speed at which they traveledacross a certain state was 17 miles per hour. The standard deviation of the...
- Q Find the margin of error for the given values of c, o, and n.c=0.90, o 3.3, n=36E=(Round to three decimal places as needed.) ...
- Q Petra wants to test the hypothesis that the amount of money spent on clothes isindependent of gender. She carries out the x test at 1% significance level and determinesthat the...
- Q In sample 1, 60 of the 100 people have blood type A. In Sample 2, 54 of the 100 people have blood type A. Find the calculated z-score used to...
- Q The gasoline prices in seven states are $1.96, $2.09, $1.79, $1.61, $1.75, $2.11, and $1.84. Answer the following (1 point) a. What is the median gasoline price? b. What is...
- Q Advice columnist Ann Landers once asked her divorced readers whether they regretted their decision todivorce. She received approximately 30,000 replies. Of the 30,000, about 23,000 came from women. Nearly75% said...
- Q Listed below are the measured radiation rates (in W/kg) corresponding to these cell phones: LG G3, HTC Desire 310, iPhone X, iPhone 7, Google Pixel, and Samsung Galaxy S8. The...
- Q Select the correct answer.Mateo teaches a continuing education class at the library on Tuesday nights. He estimates that 75% of his students are satisfied or very satisfiedwith the class.Last week,...
- Q Select the correct answer.A school board is interested in whether high school students would like to shift the school day forward by 30 minutes. They decide to conduct asurvey and...
- Q Data is collected including all freshmen at Lowe Tech College Preparatory Academy. 94%of all Low Tech freshmen own smartphones. In this situation, the number 94% is aparametercensusmistakestatistic
- Q Grace invested $5,200 in an account paying an interest rate of 4.6% compounded daily. Assuming no deposits or withdrawals are made, how much money, to the nearest dollar, would be...
- Q Select the correct answer from each drop-down menu.Elwood invested $5,000 in a money market account and has been tracking its progress. He found that after 3 years, the account held...
- Q In designing a work desk, it is found that males have sitting knee heights with a mean of 21.9 in. and a standard deviation of 1.1 in. (based on data...
- Q The heights of the adults in one town have a mean of 67.1 inches and a standard deviation of 3.5 inches. What can you conclude from Chebyshev's theorem about the...
- Q Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 67.6 beats per minute. Four of the pulse rates are 59,...
- Q The sample size n, probability of success p, and probability of failure q are given for a binomial experiment. Decide whether you can use the normal distribution to approximate the...
- Q Find the median of the following set of inches traveled by randomly selected caterpillars in a two minute time period.15, 3, 5, 9, 18, 18, 23Provide your answer below:
- Q In your sock drawer, you have 9 pairs of black socks, 4 brown, 2 red, 1 white, and 2 blue. Answer the following questions with a complete sentence.a. If you...
- Q Quality control is an important issue at ACME Company, which manufactures light bulbs. To test the life-hours of their light bulbs, they randomly sampled nine light bulbs and measured how...
- Q A random sample of 861 births in a state included 421 boys. Construct a 95% confidence interval estimate of the proportion of boys in all births. It is believed that...
- Q Suppose a computer manufacturer has the total cost function C(x) = 82x + 3600 (in dollars) and the total revenue function R(x) = 382x (in dollars).(a) What is the equation...
- Q Personnel managers usually want to know where a job applicant ranked in his or her graduating class. With a gradepoint average of 3.83, Michelle Robinson graduated above the 93rd percentile...
- Q According to a survey of the top 10 employers in a major city in the Midwest, aworker spends an average of 413 minutes a day on the job. Suppose thestandard...
- Q Find the outlier in the data: 38, 38, 18, 28, 36, 30, 39, 32. How does the outlier affect the mean? Ifnecessary, round to the nearest tenth.43; lowers it by...
- Q The local amusement park was interested in the average wait time at their mostpopular roller coaster at the peak park time (2 p.m.). They selected 13 patronsand had them get...
- Q A correlation exists when two variables are related to each other. Of the following,the correlation coefficient that indicates the strongest relationship between the twovariables being measured is-0.89+0.65+3.450.00
- Q Two manufacturers of sport utility vehicles claim that the sharpness of the turning radius for their SUV is better than all other SUVs on the market. John randomly selected 30...
- Q At Gillway Community College, 43 out of 381 students earned honors. At Montessa Valley Community College, 17 out of 108 students earned honors. Calculate the rate at which Gillway students...
- Q A college student realized that he was spending too much money on video games. For the remaining 5 months of the year his goal is to spend a mean of...
- Q Find the average of the following set of integers.-5, -41, -36,-4, -59
- Q The number of items rejected daily by a manufacturer because of defects for the last 30 days are:20, 21, 8, 17, 22, 19, 18, 19, 14, 17, 11, 6, 21,...
- Q You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack. Toestimate the mean you collect data from 28 heart patients.Match the following:eVmean...
- Q Suppose the expected future lifetime of persons diagnosed with LAS, ARC, and AIDS are 3.45, X, and 0.2 respectively and the value of M2a = 5a. Find the variance of...
- Q Maggie loves coffee. Today, while waiting to place her order for her chocolate mocha with whipped topping, she noticed the prices for the threesizes that were available. She could order:--A...
- Q Every Friday night, Gustavo pays $39.99 to eat nothing but crab legs at the all-you-can-eat seafood buffet at the M Resort in Las Vegas. On average, he consumes 26 crab...
- Q In country A, about four times as many cars are manufactured per day than in country B. If the total number of these cars manufactured per day is 33,025, find...
- Q Find the number of modes, if any, in the following set of data. If a mode exists, also give the value of the mode.84, 93, 82, 60, 15, 93, 31
- Q Dean asked his classmates, "How manyapples did you eat last week?" He got thefollowing responses: 7, 5, 5, 5, 7, 3, 2, 1, 0,0, 4, 3, 2, 1, 0, 7,...
- Q Tiana asked her classmates, "Will youtake Chorus or Music Appreciation nextsemester?" She collected these responses:11 classmates chose Chorus and 17 choseMusic Appreciation. Make a frequencytable to display these data.
- Q Students were randomly selected for a study to determine if they prefer to study Spanish or French. The results showed that 54% would prefer to studySpanish with a 4% margin...
- Q When Zahra runs the 400 meter dash, her finishing times are normally distributedwith a mean of 84 seconds and a standard deviation of 1.5 seconds. Using theempirical rule, what percentage...
- Q At the stadium for the Carolina Panthers the owners decide to survey theopinions of bleacher fans. They plan to select every 50th fan entering thestadium one Sunday afternoon.What is the...
- Q Managers at an automobile manufacturing plant would like to examine the mean completion time, u, of an assembly line operation. The past data indicate that the mean completion time is...
- Q For males in a certain town, the systolic blood pressure is normally distributed with amean of 110 and a standard deviation of 5. Using the empirical rule, determine theinterval of...
- Q When Kiran runs the 400 meter dash, his finishing times are normally distributed with a mean of 65 seconds and a standard deviation of 0.5 seconds. Using the empirical rule,...
- Q We want to conduct a hypothesis test of the claim that the population mean score on a nationwide examination in anthropology is different from 517. So, we choose a random...
- Q Find five positive integers with a mode of 6, a median of 9 and a mean of 8.4.
- Q Jose wanted to see if running three times a week would improve mile times forstudents in his gym class..... The other 15 students did their normal gym class for 4...
- Q The Ancestry Society of North Carolina is compiling records so they can learn aboutthe history of African Americans in North Carolina from 1820 to 1980. They havecompiled records of all...
- Q In tryouts for the Olympics, a speed skater had times of 44.64, 43.45, 42.79, and 42.28 seconds. Find the average time.(Hint: Add the numbers and divide by 4.)42.79 sec42.29 sec173.16...
- Q Anita's fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as oppose-to ordering the food...
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