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Practical 3
I need the answers to the 15 questions underneath by 13 August 2016 @
16h00
PLEASE SCROLL DOWN THIS PAGE TO FIND ANOTHER 8
QUESTIONS – SOME OF IT MAY BE THE SAME AS UNDERNEATH.
PLEASE SHOW AND EXPLAIN STEP-BY-STEP.
Question 11.A beer company wants to determine whether a different marketing strategy is needed for their national market as compared with their marketing strategy for their international market. One of their best beers is tasted and tested both national and international. A sample of 400 national beer drinkers showed that 60% liked the beer. A sample of 500 international beer drinkers showed that 65% of beer drinkers liked the beer. Construct an 80% confidence interval for the difference between the population proportions. What is the marginal error?
0.06580.05680.04170.0265
1 points

Question 21.A beer company wants to determine whether a different marketing strategy is needed for their national market as compared with their marketing strategy for their international market. One of their best beers is tasted and tested both national and international. A sample of 400 national beer drinkers showed that 60% liked the beer. A sample of 500 international beer drinkers showed that 65% of beer drinkers liked the beer. Construct an 80% confidence interval for the difference between the population proportions. What is the upper limit?
1 points
Question 31.Two independent samples from populations that are normally distributed produced the following statistics: for sample 1 the sample size was 19, the sample mean was 34.2 and the sample standard deviation was 12.6. For sample 2, the sample size was 23, the sample mean was 49.1 and the sample standard deviation was 19.4. Assume that population variances are equal. Construct a 95% confidence interval for the difference between the population means. What is the critical value?
4