m Jump to level 1 A charity claims that a proportion of 0.75 of donations go to communities where the average family income is less than $20,000 a year. A watchdog group checks a random sample of 60 communities that received funds from the charity to determine if the proportion is different than 0.75 at a signicance level of 0.05. Use Sheet 7 ofthe Excel file, which gives the average family incomes for the 60 communities, to calculate 13 the zscore, and the pvalue. r):- z = p = Sincethepvalue is Pick v than the signicance level 0.05, the null hypothesis Pick v I Pick v evidence exists that the proportion of donations to communities with an average family income of less than $20,000 a year is different from 0.75