I just need help with the two that have the red X next to them. Thank you! n 201

Question

I just need help with the two that have the red X next to them. Thank you!

n 2011, Lhe industries with the most complaints to the Better Business Bureau were banks, cable and satellite television comparies, collection agencies, cellular pthone providers, and new car dealerships (USA Today, April 16, 2012). The results for a sample of 200 complaints are contained in the DATAfile named 50B. Click on the datafile logo to reference the data DATA a. Construct a trequency distribution for the number of complaints by industry. Category 26 Cable Car Call 14 42 O Total b. Using a01,couct a hypothesis test to determine if the probability of a complaint is the same for the five industries. The test-statistic is 19·to 2 decimals). p-value .0008 tto 4 decimals) What is your conclusion? 200 Reject the null hyputhesis and vonlude thal the prb bility of compluint is nol sma Which industry has the most complaints? 05, conduct hypothess test tu determine if he probability u cornplairit is the same or the remaining our industries. Dropping the i The test-statistic is p-value What is your conclusion? ndustry with the most compants using to 2 detimals) 3 (to 4 dedmals) Do not rejert the null hypothecls and conrlade that the prohshility of complaint Is me.

Explanation / Answer

applying chi square test of goodness of fit:

test statistic =16.29

p value =0.001

( please revert for any clarification required)

observed Expected Chi square x Probability(p) Oi Ei=total*p R2i=(Oi-Ei)2/Ei bank 1/5 26.000 28.0 0.14 cable 1/5 44.000 28.0 9.14 car 1/5 42.000 28.0 7.00 collection 1/5 28.000 28.0 0.00 total 0.8 140 112 16.286

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