Basic Math question and answers for August 31, 2024
- Q A Gallup poll wants to determine the mean number of books Americans read each year. How many subjects are needed to estimate the average number of books Americans read with...
- Q A random sample of 28 professionals in a large city were surveyed about the length of their daily commute. The data (in minutes) are shown below. [12 pts]20 35 42...
- Q 42 students were asked to identify the color of their car. 9 have a red car, 14 drive white cars, 2 said they have a green car, 10 have black...
- Q A researcher interested in Springfield citizens' shopping habits surveys a randomly selected group of 200 Walmart shoppers. 76% of those surveyed indicated that price was more important to them than...
- Q To test the effectiveness of a liquid supplement that is supposed to help forgetful people with the memory, 400 college students are recruited for a study and divided into two...
- Q 100 students were asked what types of pets they owned. 45 owned a dog, 38 owned a cat, 14 owned a bird, 21 owned a fish, and 38 did not...
- Q To test the effect of a new exercise routine on muscle growth, a researcher sets up the following experiment: 60 volunteers subjects (40 men and 20 women) of average build...
- Q A study claims that the combination of vitamin C with vitamin E is more effective for preventing the flu than vitamin C alone. In the study, a group of researchers...
- Q Examine the data for Groups A and Group B below. What statement about Group B is true? Make sure to calculate the mean and median of both Groups A and...
- Q Suppose the average player in the NBA is 78 inches tall, with a standard deviation of 2.7 inches, while the average player in the WNBA is 69 inches tall, with...
- Q The following are all 5 quiz scores of a student in a statistics course. Each quiz was graded on a 10-point scale.10, 5, 5, 10, 10Send data to calculatorAssuming that...
- Q An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. Suppose that the mean income is found to be $20.7...
- Q Listed below are amounts of court income and salaries paid to the town justices for a certain town. All amounts are in thousands of dollars. Find the (a) explained variation,...
- Q What does it mean to reduce variation between samples?Reduce variation means that one sample will have similar characteristics to another sample.Reduce variation means that whenever you gather a sample all...
- Q The following data shows the tuition and fees (in thousands of dollars) for 14 topU.S. universities:41 39 42 47 45 42 4244 44 40 45 44 44 44
- Q You want to determine the average amount of time students at your highschool are spending a day exercising.You send a survey out to 100 randomly selected juniors at Outer BanksHigh...
- Q Which of the following is true?In an observational study the information gathered already exists.In an observational study a treatment is imposed randomly on one group in order todetermine the response.
- Q Assume that the test scores of 38 students in a math course are normally distributed with a mean of 90 and a standard deviation of 4. How many students scored...
- Q You are saving up to buy a used car. You have no idea how much you will need to save.You decide to send out a survey to a random sample...
- Q In one study of chocolate on blood flow, 75 patients who acknowledgedbeing long time chocolate eaters had their blood flow levels comparedwith those of 75 people who did not eat...
- Q During an experiment, the following times (in seconds) were recorded. Find the median.2.15, 2.49, 2.62, 10.01, 2.77, 2.44, 2.67
- Q The mean age when smokers first start is 13 years old with a population standard deviation of 2 years. A researcher thinks that smoking age has significantly changed since the...
- Q You want to determine the average amount of time students at your high school arespending a day exercising. You send a survey, to 100 randomly selected students atOuter Banks High...
- Q Thao earned the following scores on her six management exams last semester.77, 82, 44, 88, 77, 89Thao has a chance to replace her score of 44 by taking a "make-up"...
- Q EXPECTED ATTENDANCE - IF THE DAY IS SUNNY, 1000 PEOPLE WILL ATTEND THE BASEBALL GAME. IF THE DAY IS CLOUDY, ONLY 500 PEOPLE WILL ATTEND. IF IT RAINS, ONLY 100...
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