Test: Test 1 (1-6) Submit Test This Question: 1 pt 15 of 25 (15 complete)his Tes

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Test: Test 1 (1-6) Submit Test This Question: 1 pt 15 of 25 (15 complete)his Test: 25 pts possible In an experiment to determine whether seeding clouds with silver iodide increases rainfall, 50 clouds were randomly assigned to be seeded or not. The amount of rain they generated, as shown below, was then measured (in acre-feet). Complete parts (a) and (b) IQR Q1 Unseeded 25 162.11 44.19 276.63 135 89 24.11 160 25 445.88219.45 639.78 338.969204 431 Seeded a) Which of the summary statistics are most appropriate for describing these distributions? Why? Because the distributions are center and the b) Is there any evidence that seeding clouds may be effective? Explain the 7 should be used to describe the should be used to describe the spread is no evidence that seeding clouds is effective because all of the statistics for the seeded clouds are higher than those for the unseeded clouds Although the seeded clouds appear to produce more rainfall the spread of the data is too large to know for sure ? B. O C. There is evidence that seeding clouds is effective because all of the statistics for the seeded elouds are hinher than thnse for the unsnadad clouts Click to select your answer T420i Delete Home PgUp Prtsc ScrLkPause Insert Break NmLk End Pgon F12 F11 F9 F10 F8

Explanation / Answer

a)

The difference between mean and median of both distributions are very higher. So the distribution of rainfall in both cases are skewed. For skewed distributions, median should be used for center and IQR should be used for spread.

Because the distributions are skewed the median should be used to describe the center and the IQR should be used to describe the spread.

b)

All the measures are higher for seeding clouds including the spread. It denotes that there would be no consistency in the rainfall from seeding clouds.

B. Although the seeded clouds appear to produce a more rainfall, the spread of the data is too large to know for sure.

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