A market researcher obtains a sample of 50 people by standing outside a store and asking every 20th person who enters the store to fill out a survey questionnaire until she has the 50 people. i. What sampling method is being used here? ii. Will the resulting sample be a random sample? iii. Will the sample be a simple random sample? Explain your answe

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A: Given Information:Margin of error, E=1.5%=0.015Confidence level, c=95%=0.95

Q: What is the degree of freedom if the sample size is 25. Select the correct response: 25 26 24

A: We have given that,  Sample size (n) = 25 Then,  We will find the degree of freedom (df) = ?

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A: It is given that margin of error (E) is 0.015 and the confidence level is 0.90.

Q: Identify which type of sampling is used.  Every 5th student on the roster is selected for a sample

A:

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A:

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A: Confidence Interval=95%Margin of error(E)=3.5%=0.035

Q: how do you find the simple random sample of 15 restaurants?

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A:

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.