quiz 1.4

A portion of the population selected to represent the population is called a sample statistical inference a census descriptive statistics

a

In a sample of 400 students in a university, 80 or 20% are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of statistical inference descriptive statistics a population a sample

a

The Department of Transportation of a city has calculated that on average there are 16 accidents per day. What is the average number of accidents an example of? descriptive statistics statistical inference a population a sample

a

Which of the following is not an example of descriptive statistics? an estimate of the number of Alaska residents who have visited Canada the proportion of mailed-out questionnaires that were returned a table summarizing the data collected in a sample of new-car buyers a histogram depicting the age distribution for 30 randomly selected students

a

The highway patrol is interested in determining the average speed of automobiles traveling on I-75 between Chattanooga and Atlanta. To accomplish this task, the speed of every eleventh car passing a particular point on I-75 is recorded. Is speed a categorical or a quantitative variable? categorical quantitative

b

Since a sample is a subset of the population, the sample mean _____ the mean of the population. must be equal to is always smaller than varies around is always larger than

c

Statistical inference is the same as a census is the same as descriptive statistics is the process of drawing inferences about the population based on the information taken from the sample refers to the process of drawing inferences about the sample based on the characteristics of the population

c

The highway patrol is interested in determining the average speed of automobiles traveling on I-75 between Chattanooga and Atlanta. To accomplish this task, the speed of every eleventh car passing a particular point on I-75 is recorded. What constitutes the sample? the speed of all the eleventh cars the speed of all the automobiles on I-75 all the eleventh cars all the automobiles on I-75

c

The owner of a factory regularly requests a graphical summary of all employees' salaries. The graphical summary of salaries is an example of _____ statistics. inferential experimental descriptive observational

c

The sample size can be larger or smaller than the population size.can be larger than the population size. is always smaller than the population size.is always equal to the size of the population.

c

What is the collection of all elements of interest in a study? a census the sample the population a survey

c

Five hundred residents of a large city are polled to obtain information on voting intentions in an upcoming city election. The five hundred residents in this study is an example of a(n) observation census population sample

d

In a sample of 800 students in a university, 240 or 30% are Business majors. The 30% is an example of a sample statistical inference a population descriptive statistics

d

The highway patrol is interested in determining the average speed of automobiles traveling on I-75 between Chattanooga and Atlanta. To accomplish this task, the speed of every eleventh car passing a particular point on I-75 is recorded. (a) What is the population for this study? the speed of all the eleventh cars the speed of all the automobiles on I-75 all the eleventh cars all the automobiles on I-75

d

The highway patrol is interested in determining the average speed of automobiles traveling on I-75 between Chattanooga and Atlanta. To accomplish this task, the speed of every eleventh car passing a particular point on I-75 is recorded. What type of measurement scale is used? interval nominal ordinal ratio

d

The summaries of data, which may be tabular, graphical, or numerical, are referred to as statistical inference report generation inferential statistics descriptive statistics

d