Multiple Choice: business A West Coast university statistics professor wishes to
ID: 3073112 • Letter: M
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Multiple Choice: business A West Coast university statistics professor wishes to determine which surfboard brand delivers consistently longer rides, Channel Island or JS. He recruits two of his students who surf to assist in an experiment, and the student assigned to the Channel Island board is determined by coin flip. The three head out to the beach for an afternoon, with the professor holding up a sign at random times for the respective student to catch the next wave on his board, and the time spent on that wave is recorded. This is repeated until each student has ridden 10 waves. 1. The brand of surfboard in this story is A) the explanatory variable. B) a parameter. C) stratified. D) the response variable. E) blinded. 2. An observed effect that is of a size that would rarely occur by chance is called A) a statistically significant effect. B) the placebo effects. C) the confounding effect D) a randomized effect. Sale of spinach that is contaminated with e coli can cause food poisoning among consumers. A food inspector takes an SRS of 400 bags from all the bags of spinach shipped in one day. The laboratory reports that 19 of these bags had e coli contamination Unknown to the producer, 1 percent of all bags shipped had e coli. In this situation: 3. 1. A) 19 is a parameter and 1 percent is a statistic. 2. B) 1 percent is an estimate and 19 is a margin of error. 3· C) 1 percent is a parameter and 19 is a statistic. 4. D) Both 1 percent and 19 are statistics. 5. E) Both 1 percent and 19 are parametersExplanation / Answer
1) this is the response variable since to determine this the experiment conducted.
2) randomized effect since they rarely occur by chance.
3) 19 is the value of statistic and 1% is the parameter ,option c is correct answer.
4) sample is always subset of population and the value obtained by sample are called statistics and values obtained by population are called parameter.
So first option is correct answer.
5) sample of people collected and then their blood pressure registered and one record incorrect so all this ha poem in sampli ng so this error is sampli ng error therefore option B is correct answer.
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