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

Project and homework - Essay Example 30. Under the assumption that the population is distributed normally a two sample z sample for independent samples with unknown 1 and 2 is suggested. The above mentioned test is used to test the divagation between the delegacy of two populations. The standardized test statistics is,The computed T-statistics and p-value with 5% level of significance and critical value t(0.05, 82) = 1.98, are exhibited in table 1.1. The computation is done under the assumption of unequal variances due to the observed difference of respective values in descriptive statistics (table 1.0) between twain the samples.2)Columns containing data are OLD, NEW. This data contains information showing the amount of sales for 15 stores both before and after new 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 aged(prenominal) facings.The samples are considered as dependent due to t he fact that they are related to same 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