Business Statistics - Assignment PDF

BUSINESS STATISTIC
STUDENT ID:
[Pick the date]

1) An opinion poll was conducted by Pew Research Centre nationally between July 11 and
July 15, 2018 regarding the merit of the increased tariffs being levied by US on various
trading partners. The results of this survey can be obtained from
http://www.pollingreport.com/trade.htm
The poll question is indicated follows.
“Overall, do you think these increased tariffs between the U.S. and its trading partners will be
good or bad for the United States?"
2) The results of the survey are summarised as below.
40% of the respondents opined that the tariffs applied by the US on the trading partners will
be good for USA.
49% of the respondents opined that the tariffs applied by the US on the trading partners will
be bad for USA.
11% of the respondents were unsure of their opinion on the impact of the tariffs imposed on
the trading partners for USA.
3) The obtaining of the requisite confidence interval can be facilitated by adding and
subtracting the margin of error.
Thus, confidence interval for proportion of people who are in favour of tariffs on other
trading partners would be (40%-3.7%, 40%+3.7%) i.e. (36.3%, 43.7%).
It may be estimated that the average proportion of population who is in favour of levying of
tariffs on the trading partners would lie between 36.3% and 43.7% (Flick, 2015).
4) The confidence interval can be computed using the given data for the sample.
Mean proportion of those who are in favour = 0.40