What is the difference between a parameter and a statistic? i. A parameter is a

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What is the difference between a parameter and a statistic? i. A parameter is a characteristic of a sample. A statistic is a characteristic of a population. ii. A parameter describes the measure of central tendency of a sample. A statistic describes the measure of variability of a sample. iii. A parameter describes the variability of a sample. A statistic describes the measure of central tendency of a sample. iv. A parameter is a characteristic of the population. A statistic is a characteristic of a sample. Consider the set of all students enrolled in our statistics course this term. Suppose you are interested in learning about: (1) current grade point average and (2) race of the student. All of the students that participated in the study were asked their race and current grade point average. a. This study collects information from all of the students in the population. This is called a: i. Sample ii. Census b, Race of the student is: i. Quantitative, discrete ii. Quantitative, continuous iii. Qualitative, nominal iv. Qualitative, ordinal "Offshoring" is a term that describes a company's practice of relocating jobs and/or production to another country to reduce labor costs. Research was published on the phenomenon of offshoring and how prevalent it is worldwide. The article included the results from a recent survey of CEOs at U.S. firms, where each CEO was asked which of 4 categories described his or her firm's position on offshoring. a. What test should you use to determine if any of the firm position categories' true proportions differ? i. Chi-Square Test ii. ANOVA (F-Test) iii. Z-Test iv. T-Test Suppose the USGA wants to compare the mean distances associated with four different brands of golf balls when struck with a driver. A completely randomized design is employed, with Iron Byron, the USGA's robotic golfer, using a driver to hit a random sample of 10 balls of each brand in a random sequence. The distance is recorded for each hit. a. What test would you use to determine if any of the brand's mean distances differ? i. Chi-Square Test ii. ANOVA (F-test) iii. Z-Test iv. T-Test

Explanation / Answer

1)

iv) A parameter is the characristics of the Population. A statistic is a charactristics of a sample.

2)

a. ii) Census

b. ii) Quantitative, continuous

3)

i) Chi-square Test

4)

a.

ii) ANOVA (F-test)

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