1.A sample of eight adults was taken, and these adults were asked about the time they spendper week on sport activities. Their responses (in hours) are as follows:45; 12; 31; 16; 28; 14; 18; 26Make a 95 % confidence interval for the mean of time spent per week by all adults onsport activities.2. Let sample proportion . How large a sample should be taken to be 95 % sure that theerror of estimation does not exceed 0.02 when estimating a proportion?3. A business consultant wanted to investigate if providing day care facilities on premisesby companies reduces the absentee rate of working mothers from companies that provideday care facilities on premises. Sample of 50 mothers selected from the companies thatprovide day care facilities was taken. These mothers missed an average of 6.4 days fromwork last year with a standard deviation of 1.20 days. Another sample of 50 such motherstaken from companies that do not provide day care facilities on premises showed that thesemothers missed an average of 9.3 days last year with a standard deviation of 1.83 days.Construct a 98 % confidence interval for the difference between the two population means.4. Assume that 66 % of single women and 81.9 % of single men own cars. Also assumethat these estimates are based on random samples of 1640 single women and 1800 singlemen. Develop a 99 % confidence interval for the difference between the two populationproportions.

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1.A sample of eight adults was taken, and these adults were asked about the time they spend per week on sport activities. Their responses (in hours) are as follows: 45; 12; 31; 16; 28; 14; 18; 26 Make a 95 % confidence interval for the mean of time spent per week by all adults on sport activities.

1.A sample of eight adults was taken, and these adults were asked about the time they spend per week on sport activities. Their responses (in hours) are as follows: 45; 12; 31; 16; 28; 14; 18; 26 Make a 95 % confidence interval for the mean of time spent per week by all adults on sport activities.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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