6.2 please
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
6.2 please
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Given,
(a)True
Here, =20; =0.77
Probability of success i.e.,
Probability of failure i.e.,
Since the probability of success is greater than the probability of failure i.e.,, the distribution will be a negatively skewed.It is also known as left skewed.
Hence True.
(b)False
In the given statement should be considered for sample means not for sample proportions.
Hence False.
(c)False
Here,
The Standard Error is given by
Since the Standard Error is less than 2 therefore it is not unusual.
Hence False.
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