Statistics Quiz: Question Preview (ID: 19310)

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The whole group of units that you are going to study is...
a) The sample
b) The population
c) A Individual
d) The absolut frequency

A quantitive statistical variable is...
a) A variable that you can describe with words.
b) A variable that you can describe with numbers.
c) A variable that you can describe only with pictures.
d) A variable that you can not describe

Qualitatives varibles take on values that are...
a) Numbers
b) Numbers and words
c) Names or labels (words)
d) Numbers and labels

Quantitive variables can be cassified as...
a) Quantitatives or continuos
b) Discrete or continuos
c) Qualitatives or discrete
d) Can not be classified

Four friends take an IQ test. Their scores are 96, 100, 106, 114. What is the mean?
a) 103
b) 106
c) 104
d) 100

Look at this serie of data: 12, 23, 10, 11, 8, 15, 10, 9. What is the median?
a) 23
b) 12
c) 11.5
d) 10.5

Look at this serie of data: 8, 23, 10, 11, 8, 15, 10, 9, 10. What is the mode?
a) 23
b) 8
c) 10
d) 9

A simple random sample consists of four observations: 1, 3, 5, 7. Based on these sample observations, what is the best estimate of the standard deviation of the population?
a) 2
b) 6
c) 2.58
d) 6.67

What is the mode and mean for the following set of numbers? 4,9,8,2,16,4,4,8,9,6
a) mean = 7, mode =8
b) mean = 7, mode =4
c) mean = 6, mode =8
d) mean = 8, mode =9

What type of graphical representation would be best to display the following data? Between 0 and 10 years old there are 2 people, between 10 and 20 there are 8 people , between 20 and 30 there are 8 people.
a) Histogram
b) Line graph
c) Bar graph
d) Stem and leaf plot

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