Statistics for Data Science I Quiz 1: 25 February 2024 (January 2024 term)

1. A

   There is an association between “Gender” and “Willingness” as row relative frequencies will be approximately same for all rows.

2. B

   There is no association between “Gender” and “Willingness” as row relative frequencies will be approximately same for all rows.

3. C

   There is an association between “Gender” and “Willingness” as row relative frequencies will be different for all rows.

4. D

   There is no association between “Gender” and “Willingness” as row relative frequencies will be different for all rows.

Select all that apply.

1. A

   There are 9 students who have scored greater than 20 marks.

2. B

   The data is bimodal.

3. C

   Mean is greater than the median.

4. D

   Interquartile range is 28.

Select all that apply.

1. A

   Sample should not be randomly selected.

2. B

   Sample should be randomly selected.

3. C

   Sample should be a good representative of the population.

4. D

   Sample should not be representative of the population.

Select all that apply.

1. A

   The gross annual income for each of 1000 randomly chosen households in New York City for the year 2000 is a time series data.

2. B

   Passenger Name Record (PNR) number has an ordinal scale of measurement.

3. C

   Revenue generated by India through tea exports to 10 different countries in year 2010 is a cross-sectional data.

4. D

   Shirt size is a categorical variable.

1. A

   Excellent

2. B

   Poor

3. C

   Fair

4. D

   Mode is not defined for the given data

1. A

   Poor

2. B

   Fair

3. C

   Excellent

4. D

   Median is not defined for given data

Select all that apply.

1. A

   Of all the shirts with Polo style, there are 26.67% shirts of Medium size.

2. B

   Of all the shirts with Small size, there are 25% shirts of Small Print style.

3. C

   There is no association between the size and style of shirts.

4. D

   There is an association between the size and style of shirts.

1. A

2. B

3. C

4. D

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

   Mode of the data is solar energy.

2. B

   Median of the data is wind energy.

3. C

   The combined consumption of the hydro, biomass and geothermal energy is more than the wind energy consumption.

4. D

   The consumption of solar energy is 120 kWh.

Select all that apply.

1. A

   Purchase and Region are categorical variables.

2. B

   Income Range has nominal scale of measurement.

3. C

   Age has a ratio scale of measurement.

4. D

   Household size is a discrete numerical variable.

5. E

   Purchase has an ordinal scale of measurement.