A survey research center conducts frequent opinion polls, using large samples drawn by probability methods which are practically free from bias. Each of the last 100 polls was carried to estimate a percentage. All the standard errors were computed by the appropriate technique, and turned out to be very close to 3 percentage points. About how many of the estimates were off by more than 3 percentage points

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step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

what's the question here?