Basics of Probability and Statistics Week 1 Challenge

Question 1:

Answer : So When we use instead of N-1, we have an error called statistical bias, Which means that the sample variance is systematically different from the true population parameter.

Question 2:

Answer : Clustered Sampling :- In Cluster Sampling, the sampling is done on a population of clusters therefore, cluster/group is considered a sampling unit.

Stratified Clustering :- In Stratified Sampling, elements within each stratum are sampled.

Question 3:

Answer : The size of the sample to be taken is equal to the size of the population. This means that the number of different random samples that can be taken is 1

Question 4:

Answer : The probability of drawing 2 jacks from a pack of card is 4/52.

Question 5:

Answer : the probability that both the numbers on dice are same while rolling 2 dice is 6/36.

Question 6:

Answer : the mean is the average of the range of given data values, a variance is used to measure how far the data values are dispersed from the mean, and the standard deviation is the used to calculate the amount of dispersion of the given data set values.