Page 129 - Data Science class 11
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8. A trial assessment is a set of steps executed to:
a. Support b. Reject or confirm an assumption
c. Both a and b d. Fabricate an assumption
9.
Height (in cm.) 155 160 165 170 175 180
Weight (in Kg.) 61.5 65.2 70.2 73.6 76.5 77.1
Based on above data, the correlation between height and weight in the above chart can be described as:
a. Positive b. Negative
c. Zero d. None of the above
10.
Distance (in m) 0.6 1.8 3.2 3.6 4.7 5.2
Types of Insect species 45 42 38 32 29 27
In a study of insect life near a stream, data about the number of different insects’ species and the distance from the
stream were collected as above. The correlation between the distance from the stream and the number of different
species found is:
a. Positive b. Negative
c. Zero d. None of these
11. A study outlines that people who run more outdoors, have higher rates of skin disease than people who exercise
indoors. Which one of these seems the most likely to be connection between running and diseases? [CBSE Handbook]
a. Running produces a chemical that causes skin disease.
b. People who run, generally drink more water and sports drinks, which might weaken the immune system's
ability to attack disease germs.
c. People who run do so because they are obese and might have poor health conditions, to begin with.
d. People who run outdoors spend more time in the sun. Thus, they are exposed to harmful sunlight for more
extended periods.
12. Which of the following statements given below, shows a causal relationship and not just a correlated one?
[CBSE Handbook]
a. An individual's decision to work in construction and his/her diagnosis of skin disease.
b. A decrease in temperature and an increase in the presence of people at ice skating rink.
c. As the weight of a child increases so does his/her vocabulary.
d. The time spent exercising and the number of calories burned.
B. Fill in the blanks.
1. ______________________ is the act or process that produces an effect.
2. A ______________________ assessment is a distinct phase within the data quality life-cycle that is used to verify the source,
quantity and impact of any data items that breach pre-defined data quality rules.
3. ______________________ is a relationship between two variables in which both variables move along the same direction.
4. ______________________ cause also means legal cause.
5. Latency or temporal delay between the occurrence of a visual stimulus and its perception by the observer is known as
______________________.
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