STA 1000 Final Exam Review

____________ values of the standard deviation result in a normal curve that is wider and flatter.

______ is the difference between a numerical description of the population & the corresponding descriptor of the sample.

A very simple graph that can be used to summarize a quantitative data set is called a(n) ___________. 

Which of the following is not an example of unethical statistical practices?

When data are qualitative, the bars should never be separated by gaps.

College entrance exam scores, such as SAT scores, are an example of a(n) _____________ variable.

If there are seven classes in a frequency distribution, then the fourth class will always contain the median.

A population of all the customers who use the drive-thru of the local fast food restaurant is called a(n) _____________.

A bar chart is a graphic that can be used to depict qualitative data.

In an experimental study, the aim is to manipulate or set the value of the response variable.

Non-overlapping groups in random sampling of a population are called...

If space is an issue when presenting analytic dashboard graphics, gauges should be used most frequently.

Find the relative frequency for the B grade.

For a random variable X, the mean value of the squared deviations of its values from their expected value is __________.

The number of defective pencils in a lot of 1000 is an example of a continuous random variable.

If a population distribution is known to be normal, then it follows that...

An identification of police officers by rank would represent a(n) ____________ level of measurement.

Any characteristic of an element is called a ____________.

As the sample size increases, the standard deviation of the sampling distribution increases.

Which of the following graphs is for qualitative data?

______ is a graphical presentation of the current status & historical trends of a business’s key performance indicators.

The simultaneous occurrence of events A and B is represented by the notation _______________.

A ____________ variable can have values that are numbers on the real number line.

Any characteristic of a population unit is a(n)_________

______________ and _____________ are used to describe qualitative (categorical) data.

A probability may be interpreted as a long-run _____________ frequency.

Key performance indicators are best represented by a data discovery method.

A stem-and-leaf display is a graphical portrayal of a data set that shows the data set's overall pattern of variation.

The standard deviation of a standard normal distribution is always equal to ____________.

Data warehousing is defined as a process of centralized data management and retrieval.

If we examine some of the population measurements, we are conducting a census of the population.

The number of sick days per month taken by employees for the last 10 years at Apex Co. is an example of time series data

If the sampled population is finite & at least _____ times larger than the sample size, the population is infinite.

The stem-and-leaf display is advantageous because it allows us to actually see the measurements in the data set.

A population is a set of existing units.

Transactional data are now used by businesses as part of...

Which of the following is not a graphical tool for descriptive analytics (dashboards)?

If a population is known to be normally distributed, then it follows that the sample mean must equal the population mean

The median is the measure of central tendency that divides a population or sample into four equal parts.

A contingency table is a tabular summary of probabilities concerning two sets of complementary events.

As the sample size ___________, the standard deviation of the population of all sample proportions increases.

___ sampling is when we know the chance that each element will be included in the sample, so we can make stats inference

The population mean is the point estimate of the sample mean.

Statistical inference is using a sample of measurements to make generalizations about a population of measurements.

In stats class, the following 10 scores were randomly selected: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66.What's the mean?

One method of deciding whether a sample can be used to make statistical inferences about the population is to _______

In systematic sampling, the first element is randomly selected from the first (N/n) elements.

The sample standard deviation s is an unbiased estimator of the population standard deviation σ.

When developing a frequency distribution, the class (group) intervals should be ___________.

______ says that if the sample size is sufficiently large, then the sample means are approximately normally distributed.