O1- Choose the correct answer (7 marks 1. Statistical inference is the process o

Question

O1- Choose the correct answer (7 marks 1. Statistical inference is the process of making an estimate, prediction, or decision ahout s populiation based on sample datab-False a- True 2 The values of quantitative data are categories b- False a- True class designation (freshman, sophomore, junior, senior) is an example of atn) a nominal random variable. c. I random variable. b. interval random variable. d. a parameter. 4 Your final grade in a course (A, B, C, D, E) is a- nominal c- interval b-ordinal d- ratio 5. Whether or not you are over the age of 21 is a- nominal c- interval b-ordinal d- ratio 6.Which of the following statements about pie charts is false? a. b. c. d. A pie chart is a graphical representation of a relative frequency distribution. You can always determine frequencies for each category by looking at a pie chart The total percentage of all the slices of a pie chart is 100%. The arca of a slice of a pie chart is the proportion of all the individuals that fall into that particular category 7- 12 T0 Republican Democrat Independent Mode is b-8 c-independent d-12

Explanation / Answer

1. A)TRUE

By definition of statistical inference method of deducing properties of an underlying probability distribution by analysis of data. Hence, above definition covers all aspect of statistical inference , thus is true.

2 B)FALSE

Since qualitative data deals with data of catergorical variables. Its not quantitative but qualitative data.

3 A) NOMINAL RANDOM VARIABLE

Since, nominal random variable are also referred as catergorical variables or variables without any numeric values..like the ones mentioned above.

4) A) NOMINAL

Since A,B,C,D doesnot carry any numeric value with them but a category of grades which is obtained by an individual.

5) B) ORDINAL

Since one's age could be determined and designated numerically, hence an individual is above 21 years or not is a number. Hence an ordinal variable (which can be measured using a number).

6) B)

Rest other options are properties of pie charts, as they represent relative frequencies but not absolute frequencies and they sum to 100% .

7) C)

Since mode reperents which data is presented the most. So its independent that has highest frequency of all .i.e 11.

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