-17.14 points DevoreStat9 1.E.017 The accompanying data came from a study of col

Question

-17.14 points DevoreStat9 1.E.017 The accompanying data came from a study of collusion in bidding within the construction industry No. BiddersNo. Contracts 20 27 17 10 (a) What proportion of the contracts involved at most five bidders? At least five bidders? (Round your answers to three decimal places.) at most five bidders at least five bidders (b) What proportion of the contracts involved between five and 10 bidders, inclusivc? Strictly betwcen five and 10 bidders? (Round your answers to three decimal places.) between five and 10 bidders, inclusive strictly between five and 10 bidders (c) Construct a histogram. Prequency Frequency Frequency 25 Number of Number of Number of Number of 2345678 9 1011 bidders o 2345 6789 1011 bidders 2345678 9 1011 bidders 2345 6789 1011bidders Comment on interesting features. The distribution of number of bidders is skewed, ranging from a low of bidders to a high of bidders, with a typical value of around 4-5 bidders.

Explanation / Answer

a) at most 5 bidders =(7+20+27+17)/111 =0.640

at least 5 bidders =(111-7-20-27)/111 =0.514

b) between 5 and 10 bidders ; inclusive =(17+11+9+6+7+4)/111=0.486

strictly between 5 and 10 =(11+9+6+7)/111=0.297

c)histogram:

3 rd option from left

the distribution of numbers of bidders is positively skewed ; ranging from a low of 2 bidders to a high of 11 bidders.

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