3 - )) In an exam attended by 800 people, the average of the grades is 65 and the standard deviation is 7.5, showing a normal distribution. Forty samples of n=25 people were taken from this population to the returned lottery. How many of these 40 samples have an average of more than 66? a) 16 B) 22 C) 10 D) 11 E) 12
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.
3 - )) In an exam attended by 800 people, the average of the grades is 65 and the standard deviation is 7.5, showing a
a) 16
B) 22
C) 10
D) 11
E) 12
Step by step
Solved in 2 steps
