Imagine that you conducted a study in which people were rated by their friends as to how helpful of a person they were. You then selected the 20 people who were rated as most helpful and the 20 people who were least helpful by their friends and asked them to make a contribution to a food drive. Half of these students were given a reminder phone call the night before the food drive or while the other half were not given a reminder. Now that you are taking this class and thinking like a social psychologist, you should predict that

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

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?