An operational definition is a definition stated in terms of specific testing or measurement criteria. 3. A numerical value used as a summary measure for a sample, such as sample mean, is known as a sample statistic. 4.
As mentioned earlier, datasets whose values come from a purely nominal scale of measurement, such as eye color, gender or occupation cannot be used to calculate a sample mean value or a sample median value because of the way that each of them gets calculated
Use graphical as well as numerical summary measures. Explain what you see. Be sure to consider all 10 pairings. Some variables show clear relationships, while others do not. 4.
Solution: a) As the employee sample size, n < 30 this is a t-distribution. b) c) The confidence interval for the mean is given by the following formula: Thus the 95% confidence interval for the mean is given as: (see attached file).
A z test is used if the population variance is known - a t-test is used when it is unknown. In this case, it is estimated by the sample variance and the sample size.
A numerical value used as a summary measure for a sample, such as sample mean, is known as a a. population parameter b. sample parameter c. sample statistic d. population mean e. None of the above answers is correct. ANSWER: 2.
Descriptive measures for a sample 2. summary measures for the population 3. pre-determined variables 4. endogenous variables summary measures for the population: Collection and interpretation of quantitative data.
A proper verbal hypothesis statement for your problem would be: The null hypothesis is that the townships population mean is at least as large as the mean of the overall population.
Identify the numerical values of the assumed parameters and the statistics for the mean and standard deviation in this problem. If a parameter is unknown, write unknown. i.
The researcher has used the survey method for collecting the sample data which has been extensively used in the research.