TOH

TOHCase-StudyThe avg no of defective items in a factory is claimed to be less than the average for all the factories.The avg for all the factories is 30.5. A random sample of 100 defective articles showed the following distribution

Test the claim that the average is less than 30.5 for all factories at 5% los.CINumber16-201221-252226-302031-353036-4016Case studySamples of two types of electronic tubes were tested for length of the life and the following data were obtained:

Test the hypothesis Mean life of electronic tubes of first and second type are same at 1% l.o.s.

Type-IType-IISample Sizen1=35n2=45Sample means1,250 Hrs1,350 Hrs36 Hrs40 Hrs.4Case- studyTwo hundred randomly selected adults were asked whether TV shows as whole are primarily entertaining, educational or a waste of time. The respondents were categorized by gender. The responses are given in the following table:

Is this evidence that there is a relationship between gender and opinion in the population interest?

GenderOpinionTotalEntertainingEducationalWaste of timeFemale552530110Male30105090Total853580200Case studyA Tea company appoints four salesmen A,B,C and D and observes their sales in the three seasons. The following data collectedSeasonSalesmenTotalABCDSummer36362135128Winter28293132120Monsoon26282929112Total90938196360QuestionsDo the salesmen significantly differ in performance

Is there significant difference between the seasons