Apple has two factories producing iPhone factory one produces 40% of the iPhone 1532 produces the remaining iPhones 1% of iPhones produced by factory when are defective and 2% of iPhones produced by factory 2U or defective what is the probability that it will be defective

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?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.