As a quality assurance attempt In a manufacturing setting, every fifth Item is p

Question

As a quality assurance attempt In a manufacturing setting, every fifth Item is picked for further testing till a sample of 50 is attained. This type of sampling Is called: Convenience Random systematic stratified At of 3000 thermometers manufactured by a thermometer manufacturing firm in one week 400 are reading the freezing point between "0" degrees and "-5" degrees. Out of the 400 thermometers 150 of road the freezing points below "-5" degrees. 150 Is considered to be: Parameter Statistic Variable population Given the following set of test score with their respective frequencies, what is the relative frequency associated with the score 80. 10% 15% 20% 25%

Explanation / Answer

19) This process of sampling every unit after some fixed number of units is called systematic sampling. So answer is (c)

20) The data is the readings of the thermometers. 150 is the number of the data points reading below -5 degrees, hence purely a function of the data. So this is a statistic. Answer is (b)

21) Total frequency is 34

Frequency of 80 is 5

So relative frequency is (5/34) x 100% = 14.7% which is approximately 15%. So answer is (b)

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