Question

2. (a) The table below shows weekly earnings (in Ringgit Malaysia) of full- time male and female workers for five years Weekly carning of male workers, x Weekly earning of female workers, y 670 679 695713 722 512 529 552 573 585 (8 marks) Calculate coefficient of determination. Interpret vour answer (b) A nutritionist claims that the mean local fruit consumption by a person in Kuala Lumpur is 3.4 kg per month. A sample of 60 people in the state shows that the mean local fruit consumption by a person is 3.2 kg per month with standard deviation of 1.13 kg. At α=0.08, can you reject the nutritionist's claim? Assume the population is normally distributed. 53d3467 8b1 (7 marks) On Monday and Wednesday night, Mr. Nathan went to bed listening to his favorite music CD. The CD contains music from 3 different genre 4 tracks are Country Music, 5 tracks are Rock and 3 tracks are Jazz. His stereo is programmed to play the tracks in a random order. How likely is it that on at least one night Mr. Nathan fell asleep listening to Country Music? (c) (2 marks) C0340353d346708611 5d8 (d) A company manufactures tennis balls. When its tenmis balls are dropped onto a concrete surface from a height of 100cm, the company wants the mean height the balls bounce upward to be 55.5cm. If the mean value, 55.5cm falls between 99% confidence interval, the company will bc satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce h 0.25cm. Is the company making acccptable tennis balls? Explain. eight of the sample is 56.0cm and the standard deviation is (3 marks) ***END OF QUESTIONS

Can someone teach me how to answer the questions mentioned above?

Answer 1

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