Please show in detail and explain how numbers 9, 10, 11, and 12 came out to be t

Question

Please show in detail and explain how numbers 9, 10, 11, and 12 came out to be the anwers that they are with as much detail as possible

also could you include what formula used from the formula reference sheet

And if possible explain when you would use each formula on the refernce sheet

Thank you!

9. The ordered array below resulted from selecting a sample of 25 batches of 500 computer chips and determining how many in each batch were defective. What is a cumulative percentage distribution for" 0 but less than 10" Defects 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 a) 16% 40% c) 48% d) 56% 10. The employees of a company were surveyed on questions regarding their educational background (college degree or no college degree) and marital staus (single or married). Of graduates. The probability that an employee of the company in married and has a college degree is 0.567 a) 0.597 b) 0.667 c). 0.697 A well-stratified sample of 300 adults was selected to examine an empirical question for a presidential campaign in 2002. The contingency table below shows their registration status for voting and their preferred source of information on current events. Preferred source of information Television Newspapers Radio Intenet 45 36 45 30 Voting registration status Registered 20 Not registered 35 11. Refering to the above infomration, when an adult is randomly selected, what is the probability that he/she is a registered OR prefers to get his/he information from the internet? a) 54.62% b) 64.28% c) 67.67% 58.66% 12. Refering to the above infomration, when an adult is randomly selected, what is the probability that he/she is a registered once we know for sure that he/she prefers to get his/he information from the internet? 54.62% b) 64.28% c) 67.67% d) 58.66%

Explanation / Answer

9) as there are 10 sample out of 25 ; therefore CDF (0<X<10) =10/25 =0.4 ~ 40%

10)

as threre are 60 single college degree holders; therefore number of married degree holders =400-60=340

hence probability =340/600=0.567

11)

number who prefer to get information from net or registered=45+30+45+36+20=176

hence probability=176/300=0.587 ~ 56.66%

12)

as total of 56 students who prefer to get information from net are registered hence probability =36/56=0.6429~64.29%

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