Question 1

Parameter estimation is used to compare the sample statistic with what is believed to be the population value prior to undertaking the study.

Accepted Answer

Parameter estimation is used to estimate the population parameter based on sample data, not to compare with a pre-existing belief about the population value.

Question 2

A parameter estimation is a statistical procedure used to accept or reject the hypothesis based on sample evidence.

Accepted Answer

Parameter estimation is used to estimate the values of parameters in a statistical model, not to accept or reject hypotheses. Hypothesis testing is the procedure used for accepting or rejecting hypotheses.

Question 3

Values that are computed from information provided by a sample are referred to as the sample's parameter.

Accepted Answer

Values that are computed from information provided by a sample are referred to as the sample's statistics. Parameters, on the other hand, are values that describe a population.

Question 4

The most commonly used level of confidence in marketing research is the 95% level,corresponding to 1.96 standard errors.

Accepted Answer

This is true. The 95% level of confidence is commonly used in marketing research and corresponds to a z-score of 1.96, which represents 1.96 standard errors above and below the sample mean.

Question 5

Inference is a form of logic in which you make a general statement about an entire class based on what you have observed about a small set of members of that class.

Accepted Answer

This is the correct definition of inference.

Question 6

The z value associated with a 95 percent confidence interval is either ±1.96.

Accepted Answer

This is true. A 95% confidence interval corresponds to a z-score of ±1.96.

Question 7

The standard error will increase if the variation (standard deviation)is increased.

Accepted Answer

The standard error is directly proportional to the standard deviation, so if the standard deviation is increased, the standard error will also increase.

Question 8

Measures of central tendency is a set of procedures in which the population size and sample statistics are used to make estimates of population parameters.

Accepted Answer

Measures of central tendency, such as mean, median, and mode, describe the center of a data set, not procedures for estimating population parameters.

Question 9

Values that are computed from a complete census,which are considered to be precise and valid measures of the population,are referred to as parameters.

Accepted Answer

Parameters are computed from a complete census and are considered to be precise and valid measures of the population.

Question 10

Two types of statistical inferences are parameter estimates and hypothesis tests.

Accepted Answer

This statement is true. Parameter estimates involve using sample data to estimate the value of population parameters, while hypothesis tests involve using sample data to test a specific hypothesis about a population parameter.

Question 11

When reporting descriptive statistics to clients,descriptive measures such as median and mode need not be included in the standard metric variable table as managers do not relate to median or modes of scale data.

Accepted Answer

Median and mode are not as commonly used as mean and standard deviation, and they can be more difficult to interpret.

Question 12

The standard error will increase if sample size is increased.

Accepted Answer

The standard error decreases as sample size increases. This is because a larger sample size provides more information and reduces the uncertainty around the true population parameter.

Question 13

If you were investigating the percentage of high school students who eat at the local Taco Bell,the percentage - because it is derived from the sample - is the sample statistic.

Accepted Answer

A sample statistic is a numerical measurement that describes an aspect of a sample. In this case, the percentage of high school students who eat at the local Taco Bell is a measurement obtained from a sample of high school students, therefore it is a sample statistic.

Question 14

In parameter estimation,a value such as the population mean is estimated based on a sample's mean and its size.

Accepted Answer

This statement is true. In parameter estimation, the goal is to estimate an unknown parameter of a population based on information obtained from a sample. The sample mean, along with its size, can be used to make an estimate of the population mean using statistical inference methods.

Question 15

Confidence intervals are the degree of accuracy desired by the researcher and stipulated as a level of confidence in the form of a range with a lower boundary and an upper boundary.

Accepted Answer

Confidence intervals are indeed specified by researchers and include a range of values with a lower and upper boundary that provides a level of confidence in the accuracy of the measurement or estimate.

Question 16

A practical use of confidence intervals is that they may be used to forecast likely,pessimistic,and optimistic forecasts.

Accepted Answer

Confidence intervals provide a range of values that are likely to contain the true value of a population parameter. These ranges may be used to create forecast intervals for future values, including likely, pessimistic, and optimistic scenarios.

Question 17

To calculate the mean and to generate a confidence interval estimate of the population mean,the sequence of menu commands in the SPSS for Windows is ANALYZE;COMPARE MEANS;ONE SAMPLE T TEST.

Accepted Answer

The ONE SAMPLE T TEST in SPSS is used to compare the sample mean to a known value and provides a confidence interval for the population mean.

Question 18

A hypothesis test is used to approximate the population value through the use of confidence intervals.

Accepted Answer

A hypothesis test is used to test a claim or hypothesis about the population value, while a confidence interval provides a range of values that is likely to include the population value with a certain level of confidence.

Question 19

To estimate a parameter,you need to know the sample statistic,which is either a mean or percentage derived from sample data.

Accepted Answer

To estimate a parameter, you need to use a sample statistic, which is typically a mean or percentage calculated from the sample data.

Question 20

Greek letters are used for sample statistics and Roman letters are used for parameters.

Accepted Answer

Greek letters are used for parameters and Roman letters are used for sample statistics.

Quiz 12: Using Basic Descriptive Analysis, performing Population Estimates, and Testing Hypotheses