I-The average number of customers per day which walk into a retail store is 7. The manager of the store knows this information from a computer read…

I-The average number of customers per day which walk into a retail store is 7.43. The manager of the store knows this information from a computer read out and decides to take a sample. She finds that the average number of customers  per day is 5.43. With this information,the manager can conclude:

a-There is a bias in her sample method

b-There is error in her sampling method

c-She can not make a conclusion

d-None of the above

II-A marketer wants to better understand his target market. He takes a sample of 100 consumers by posting fliers around a local town and asking them to go to a website to fill out a survey. The type of sampling method he has undertaken is considered to be:

a-A convenience sample

b-A voluntary response sample

c-A simple random sample

d-None of the above

III-A researcher would like to try and estimate the proportion of males in her population of interest. The real proportion  ( the parameter) of males is .43. She decides to take a sample of size 4. What can this researcher expect in her statistic?

a-Her statistic will always be biased.

b- Her statistic will always have an error.

c-She is measuring the incorrect parameter.

d-None of the above

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