1. a random sample of 50 households was selected for a telephone survey. the key question asked was, " do you or any member of your household own a cellular telephone with a built in camera?" of the 50 respondents, 15 said yes and 35 said no. the standard error of the households with telephone with built in camera is...........

2. in an inspection of 4000 electrical components built to a very high specification 10 were found to defective. the upper 95% confidenc limit for the true proportion of defectives in the production of the components is.............