Aquality control expert at life batteries wants to test their new batteries. the design engineer claims they have a variance of 5929 with a mean life of 941 minutes. if the claim is true, in a sample of 109 batteries, what is the probability that the mean battery life would be greater than 948.8 minutes? round your answer to four decimal places.

Atriangle has side lengths of 15 inches and 30 inches. it also has angles that measure 45º and 20º. which of the following identifies the possible third angle of the triangle? a. 15 in., 65º b. 45 in., 65º c. 17 in., 115º d. 14 in., 115º

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?