Project and homework Essay Example | Topics and Well Written Essays - 1000 words

attend and homework - Essay Example 30. Under the surmise that the population is distributed normally a two adjudicate z riddle for independent samples with unknown 1 and 2 is suggested. The above mentioned test is used to test the variety between the means of two populations. The standardized test statistics is,The computed T-statistics and p-value with 5% level of significance and exact value t(0.05, 82) = 1.98, argon exhibited in table 1.1. The computation is done under the assumption of unequal variances due(p) to the observed difference of respective values in descriptive statistics (table 1.0) between both the samples.2)Columns containing data are OLD, NEW. This data contains information showing the amount of gross sales for 15 stores both before and after young shelf facings were installed. You suspect and wish to prove that the mean sales with the new facings is different from the mean sales under the old facings.The samples are considered as dependent due to the fac t that they are related to identical population. The population standard deviations of the both the samples are unknown. The sample sizes are considered to be small i.e. 30. Under the assumption that the population is distributed normally a paired sample t-test is suggested. The above mentioned test is used to test the difference between the means of two dependent samples. The standardized test statistics