Stats Test
Determine whether the value given below is from a discrete or continuous data set. When a car is randomly selected and weighed comma it is found to weigh 1826.4 kg. nothing nothing nothing nothing nothing nothing nothing Choose the correct answer below.
A continuous data set because there are infinitely many possible values and those values cannot be counted
Determine whether the given value is from a discrete or continuous data set. When a car is randomly selected, it is found to have an engine with 4 cylinders.
A discrete data set because there are a finite number of possible values. nothing
How do a parameter and a statistic differ?
A parameter is a numerical measurement of a population; a statistic is a numerical measurement of a sample
What is a voluntary response sample?
A sample in which the subjects themselves decide whether to be included in the study
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Monthly rainfall: 2.4 in comma 2.7 in comma 3 in comma 3.3 in comma and 3.6 in Choose the correct answer below
Ratio
Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a survey, the favorite sports of respondents are identified as 0 for basketball comma 1 for baseball comma 2 for football comma and 3 for anything else. The average (mean) is calculated for 776 respondents and the result is 1.1 .
The data are at the nominal level of measurement.
Given the data in the table below, what issue can be addressed by conducting a statistical analysis of the pulse rates? Pulse Rate (beats per minute) Male 62 74 65 60 61 Female 64 64 72 85 80
The data can be used to address the issue of whether males or females have pulse rates with the same average (mean) values
Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on 37 different days, and the average (mean) value is 148.8 volts.
The given value is a statistic for the year because the data collected represent a sample.
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Water temperature in degrees Celsius Choose the correct answer below.
The interval level of measurement is most appropriate because the data can be ordered comma differences can be found and are meaningful comma and there is no natural starting zero point.
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Brain volumes measured in cubic cm Choose the correct answer below
The ratio level of measurement is most appropriate because the data can be ordered comma differences can be found and are meaningful comma and there is a natural starting zero point.
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Length of the side of a square in cm Choose the correct answer below.
The ratio level of measurement is most appropriate because the data can be ordered comma differences left parenthesis obtained by subtraction right parenthesis can be found and are meaningful comma and there is a natural starting zero point.
A particular country has 60 total states. If the areas of 50 states are added and the sum is divided by 50, the result is 197 comma 944 square kilometers. Determine whether this result is a statistic or a parameter.
The result is a statistic because it describes some characteristic of a sample
Determine whether the given value is a statistic or a parameter. Upper A survey found that 89 % of all respondents have jobs. Choose the correct answer below.
The value is a statistic because it is a numerical measurement describing some characteristic of a sample.
Determine whether the source given below has the potential to create a bias in a statistical study. A certain medical organization tends to oppose the use of meat and dairy products in our diets, and that organization has received hundreds of thousands of dollars in funding from an animal rights foundation.
There does appear to be a potential to create a bias. There is an incentive to produce results that are in line with the organization's creed and that of its funders.
In a study of a weight loss program, 35 subjects lost a mean of 3.2 lbs after 12 months. Methods of statistics can be used to show that if this diet had no effect, the likelihood of getting these results is roughly 4 chances in 1000. Does the weight loss program have statistical significance?
Yes, because it is unlikely to happen by chance
Refer to the given table of measurements below. Is there some meaningful way in which the IQ scores are matched with the corresponding brain volumes? If they are matched, does it make sense to use the difference between each IQ score and brain volume that is in the same column? Why or why not?
Yes, each IQ score is matched with the brain volume in the same column, because they are measurements obtained from the same person
If they are matched, does it make sense to use the difference between each IQ score and brain volume that is in the same column? Why or why not?
No, it does not make sense to use the difference between each IQ score and brain volume in the same column, because IQ scores and brain volumes use different units of measurement.
In the data table below, the x-values are the weights (in pounds) of cars and the y-values are the corresponding highway fuel consumption amounts (in mi/gal). Weight (lb) 4097 3382 4198 3655 3585 Highway Fuel Consumption (mi/gal) 27 32 29 29 30 Comment on the source of the data if you are told that car manufacturers supplied the values. Is there an incentive for car manufacturers to report values that are not accurate?
Yes, because consumers, in general, would prefer to buy a car with a higher level of fuel efficiency. In this case, the source of the data would be suspect with a potential for bias.
In a study of a weight loss program, 4 subjects lost an average of 45 lbs. It is found that there is about a 24% chance of getting such results with a diet that has no effect. Does the weight loss program have practical significance?
Yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant
An ad for airbags claimed that proper usage of airbags "reduces the chance of fatality in a car crash by 300 percent." What is wrong with this statement? Choose the correct answer below.
If airbags eliminated all fatalities comma it would result in a 100 % reduction comma so it is not possible to reduce fatalities by more than 100 %.
An ad for a device used to discourage car thefts stated that "This device reduces your odds of car theft by 300 percent." What is wrong with this statement? Choose the correct answer below.
If the device eliminated all car thefts comma it would reduce the odds of car theft by 100 % comma
Based on a study of heights of men and women who play basketball, a researcher concludes that the exercise from playing basketball causes people to grow taller. Do you agree with this conclusion? Choose which conclusion you agree with.
No. There may be a relationship between height and playing basketball, but that does not mean that one causes the other
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Favorite musicians Choose the correct level of measurement.
Nominal
D.) Among the 1018 respondents, 291 said that cellular phones are "not at all annoying." What percentage of respondents said that cellular phones are "not at all annoying" question mark
28.59% look at formula sheet
A polling company reported that 19% of 1018 surveyed adults said that cellular phones are "quite annoying." Complete parts (a) through (d) below
A.) What is the exact value that is 19% of 1018? The exact value is 193.42. (look at formula sheet)
A polling company reported that 19% of 1018 surveyed adults said that cellular phones are "quite annoying." Complete parts (a) through (d) below
B.) No, the result from part (a) could not be the actual number of adults who said that cellular phones are "quite annoying" because a count of people must result in a whole number.
Determine whether the value is from a discrete or continuous data set. Number of members present at a meeting is 6 Is the value from a discrete or continuous data set?
Discrete
In a study of a weight loss program, 4 subjects lost an average of 45 lbs. It is found that there is about a 24% chance of getting such results with a diet that has no effect. Does the weight loss program have statistical significance?
No, the program is not statistically significant because the results are likely to occur by chance.
Determine whether the sampling method described below appears to be sound or is flawed. In a survey of 737 human resource professionals, each was asked about the importance of the experience of a job applicant. The survey subjects were randomly selected by pollsters from a reputable market research firm.
It appears to be sound because the data are not biased in any way.
Determine whether the sampling method described below appears to be sound or is flawed. In a survey of 739 subjects, each was asked how often he or she read a book. The survey subjects were internet users who responded to a question that was posted on a news website.
It is flawed because it is a voluntary response sample.
Determine whether the given value is from a discrete or continuous data set. When a limo is randomly selected, it is found to have a gas tank that can hold 18.5 gal. Choose the correct answer below.
It is from a continuous data set because the number of possible values is infinite and not countable
In a study of a weight loss program, 35 subjects lost a mean of 3.2 lbs after 12 months. Methods of statistics can be used to show that if this diet had no effect, the likelihood of getting these results is roughly 4 chances in 1000. Does the weight loss program have practical significance?
No, someone starting a weight loss program would likely want to lose considerably more than 3.2 lb
Determine whether the given value is a statistic or a parameter. Upper A sample of seniors is selected and it is found that 35 % own a television. Choose the correct statement below.
Statistic because the value is a numerical measurement describing a characteristic of a sample.
Part B) What is wrong with the given calculation?
Such data are not counts or measures of anything, so it makes no sense to compute their average (mean).
C.)What could be the actual number of adults who said that cellular phones are "quite annoying" question mark
The actual number of adults with this opinion could be 194 you just round up to nearest integer
