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.