Consider the following dot plot. Of the following statements, which two characteristics of this dot plot make the median a bette
r choice than the mean to summarize the center of the distribution?
The data are skewed and there is an outlier.
The data are symmetric and there is an outlier.
The peak is equal to the median and the data are skewed.
The mean is equal to the median and the data are symmetric.
The data are skewed and there is an outlier.
The data are symmetric and there is an outlier.
The peak is equal to the median and the data are skewed.
The mean is equal to the median and the data are symmetric.
2 answers:
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Answer:
a) 0.23
b) The 95% confidence interval for the population proportion is (0.1717, 0.2883).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
Point estimate
The point estimate is:
95% confidence level
So , z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the population proportion is (0.1717, 0.2883).