Statisitics

heading 1: Independent ergodic renders from two usu solelyy distributed creations flag the following results: nX = 10 x? = 480 sx = 30 ny = 12 y? = 520 sy = 25 a. If we assume that unknown population variances are equal, what is the 90% assertion interval for the dispute of population means? b. If we do non assume that the unknown population variances are equal, find the 90% confidence interval for the difference between the population means. disposition 2: A newspaper clause describe that quartet hundred mountain in one state were surveyed and 75% were strange to a recent course decision. The same article reported that a similar survey of 500 people in another state indicated opposition by save 45%. Construct a 95% confidence interval of the difference in population proportion s based on data. drumhead 3: In a random sample of 99 study Basketball Association games the home team has won 57 games. tally the void guess that the home wins one-half of all games against the alternative that the home team wins a absolute majority of games.

Question 4: A process produces cable for the topical anaesthetic peal company. When the process is operating correctly, cable diameter follows a popular distribution with mean 1.6 pass ones and commonplace leaving 0.05 inch. A random sample of 16 pieces of cable put in diameters with a sample mean of 1.615 inches and a sample standard deviation of 0.086 inch. a. assume that the population standard deviation is 0.05 inch, try at the 10% take aim agains! t a bilateral alternative the null hypothesis that the population mean is 1.6 inches. influence also the lowest take of significance at which this null hypothesis can be rejected against the two-sided alternative. b. Test at the 10% level the null hypothesis that the population standard deviation is 0.05 inch against the alternative that is bigger. Question 5: Small-business...If you want to get a full essay, order it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay