Sampling error occurs when a sample somehow does not represent the target population.
Answer:
Statement (A) is true
<u>Explanation:</u>
Sample means a small group selected from a large group.The large group from which a sample is selected is called the population.Basically a sample is selected to draw conclusions regarding population because it is not possible to study the entire sample.But if sample sample does not represent the target population then our conclusions will not be accurate.This will give rise to sampling errors.
If occurs when sample is biased.So we need to be very careful while selecting a sample.It must represent the entire population not just a part of population.
Sampling error can be reduced by increasing the size of population,dividing population in groups,select appropriate population.
Sampling error occur when population is not correct as per our requirement,or when sample is selected randomly.It may also occur when sample selected does not respond ,at that time it becomes difficult to draw conclusions regarding population.
Answer:
352,000
Explanation:
add up all the numbers, then you divide by 3
Answer : The p-value of 0.0743 is greater than alpha at 0.05; so we fail to reject the null hypothesis and conclude that there is no significant difference in the number of unique users before and after a change in policy.
In this question, the manager wants to know if the number of users has changed.
So, the null and alternate hypotheses are:
Null Hypothesis: 
Alternate Hypothesis : 
Type of test : Two-tailed test
The level of significance is 95%
We can calculate alpha (α) as follows:
The p value = 0.0743.
We use the following rules to arrive at a conclusion when p-values and alpha is given:
If 
, reject the null hypothesis
If 
, we don't reject the null hypothesis.
Since the p-value is greater than alpha, we don't reject the null hypothesis.
Answer:
Line extension
Explanation:
Duncan Corp. is applying the strategy of diversifying an existing successful product line by introducing new variations of the product. This approach of adding variety to a existing product aiming to expand its customer base is known as line extension.
