STAT 301 Lecture Notes - Lecture 2: Quartile, Alpha Wave, Summary Statistics

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chocolatecaribou499

15 Jun 2020

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Parameter: a parameter is a numeric characteristic pertaining to a population. In the brain waves study, one example of a parameter might be the true population average alpha- wave for all prisoners in the us: we never get to know the true value of a parameter. Statistics: a statistic is any number you calculate using data. In the brain waves study, if we use the average brain waves of the prisoners in our sample to estimate the average brain waves of all prisoners in the us, then the sample average is our statistic. We could make a graph of the data, or tell you the average. Location where the data is located on a number line: measures of location, mean, median, quartiles, minimum and maximum, 5-number summary. It is the middle data point when the data are arranged from smallest to largest. Mean (average: the mean or sample mean or sample average is one statistic that identifies the data"s center.

Related Questions

1. Matt, the manager, wants to estimate the mean wait time for customers to check out in his Mini-Market. He randomly selects customers and determines the mean wait time is minutes. Define the following for this exercise:

a) Is the data collected qualitative or quantitative?

b) Variable (x):

c) Population of Interest:

d) Sample:

e) Parameter of Interest and Statistic: Do you expect the parameter and the statistic to be the same value? Explain.

f) Discuss the use of descriptive and inferential statistics in this exercise.

g) Is the variable, x, discrete or continuous?

2. Identify the population and sample for the following examples:

The P.E. coach of a middle school interested in the mean height for the graders in the school. He randomly selects graders and measures the height of each.

a) Population:

b) 7thgraders Sample:

c) A community college notices that an increasing number of full-time students are working while attending school. The administration randomly selects 200 students and determines how many hours per week each student works.

fuchsiatermite35

1. Matt the Manager wants to estimate the mean wait time for customers to check out in his Mini-Market. He randomly selects 40 customers and determines the mean wait time is 2.7 minutes. Define the following for this exercise:Experimental Unit or Individual: Is the data collected qualitative or quantitative?Variable (x):Population of Interest:Sample:Parameter of Interest:Statistic:Do you expect the parameter and the statistic to be the same value? Explain.Discuss the use of descriptive and inferential statistics in this exercise.Is the variable, x, discrete or continuous?

2. Identify the populationand samplefor the following examples:a)The P.E. Coach of a middle school interested in the mean height for the 7thgraders in the school. He randomly selects 40 7thgraders and measures the height of each.Population: 7thgraders Sample: 40 7thgraders chosenb)A community college notices that an increasing number of full-time students are working while attending school. The administration randomly selects 200 students and determines how may hours per week each students works.

fuchsiatermite35

STAT 301 Lecture Notes - Lecture 2: Quartile, Alpha Wave, Summary Statistics

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