Week_1_Practice_Problem_Solutions

Week_1_Practice_Problem_Solutions - Week 1 Practice...

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Week 1 Practice Problems 1. In a study of bottled drinking water available in Ontario, researchers collected one bottle of each brand from local supermarkets. There were 23 bottles in total. The bottles were opened and the number of bacteria colonies per ml was determined. Then the bottles were re-capped, left for two days and the colony count was repeated On average, there were 38,000 times as many colonies after two days. The researchers concluded that it was not safe to reuse bottled water after it has been opened. Answer the following based on the information given a) A unit is__a bottle of water___ b) The target population is _ bottled drinking water available in Ontario ___ c) The response variate is the _proportionate increase in the number of bacteria colonies per ml of each bottle after two days_ d) One attribute of interest is __ averageincrease in the number of colonies in the target population. e) The study population is __ bottles available from local supermarkets _at the time of the study f) The sample is ___23 bottle of water selected _____ g) What would study error be in this case? The difference between the attribute of interest in the study and target populations h) What would sample error be in this case?
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Week_1_Practice_Problem_Solutions - Week 1 Practice...

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