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Statistical sampling

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Wize University Statistics Textbook > Collecting Data & Sampling

Good Sampling

4 Activities

Which statment about bias is/are TRUE?

i) Selection bias is significantly reduced when the sample size is larger
ii) Non-response bias results from random variation in the samples and will always be present
iii) Bias results from samples that do not represent the entire population
iv) A cencus survey does not have bias since it includes every person in the population
More Good Sampling Questions:
Statistical Sampling
A marketing agency is interested in learning about the opinion of the general public about a new product that has been developed. In their study, they randomly call 200 home phone numbers and ignore people that do not have a home phone. Which of the following is least likely to occur?
Statistical sampling
A textbook publisher received 5 shipments of 100 seemingly identical statistics books each. He chooses 2 shipments at random and checks 15 of the books randomly within each shipment, and found that 3 of these books have errors. Which of the following statement is TRUE?
Statistical Sampling
To determine the average household income in a very small town, a survey was mailed to 200 randonly selected homeowners in this town. Which of the following is most likely to occur?
Statistical sampling
One of the questions in a researcher's sample survey is: "Given one of the main ways germs are transmitted is through person-to-person contact, how often do you use hand sanitizer?"This will likely lead to?
Statistical Sampling
Which of the following statement is true?
Statistical Sampling
When you are increasing the sample size, which of the following is true?
Statistical sampling
A study on wellbeing and stress of university students is conducted. The researcher drew a random sample of 5 departments on campus. Then he randomly sampled 100 students within each department that was selected and handed them the link to his online survey. Ultimately, only 30% of the sample responded. Amongst those who responded, 120 of them say they feel stressed.
(c) Which of the following is definitely true?
Statistical Sampling
Which of the following could reduce sampling bias?
Population sampling
There are 600 Sephora locations in the United States. Christine randomly selected 40 stores, and then she randomly selected 100 customers from each of those stores. Less than 1% of her sample identified as heterosexual males. Based on her sample, the average spending at Sephora is $45. In addition, 340 customers in her sample revealed that they have VIB Rouge status, which the highest tier status that is reached when a customer spends $1,000 in a calendar year.
Which of the following is/are true? (Check all that applies.)