Stats 1 Qualifier: 13 April 2025 (January 2025 term)

1. A

   The population is all threaded rods ever produced at the factory and the sample is all the threaded rods produced in the month of August 2022.

2. B

   The population is all threaded rods ever produced at the factory, and the sample is the 40 selected threaded rods.

3. C

   The population is all threaded rods produced in the year 2022 and the sample is the threaded rods produced in the month of August 2022.

4. D

   None of these.

1. A

   Two data sets with the identical frequency distributions will have identical relative frequency distributions.

2. B

   A relative frequency is the number of observations belonging to a category.

3. C

   Two data sets with the identical relative-frequency distributions will always have identical frequency distributions.

4. D

   If all of the bars in a bar chart have the same length, then the categorical variable shown in the bar chart has no variation.

Select all that apply.

1. A

   Eye colour of a person has ordinal scale of measurement.

2. B

   Recording the price of bitcoin every hour for 3 days is a time-series data.

3. C

   Number of students present in a class is a discrete variable.

4. D

   Amount of milk (in litres) is a categorical variable.