You are watching: Express the confidence interval in the form of p ± e
Yes, the proportion of girls is substantially various from 0.5.
No, the confidence interval includes 0.25, so the true percentage might quickly equal 25%
546 x 39.4% = 215.124
b. 0.340 0.448
c. 0.367 0.421
d. The 99% confidence interval is broader than the 80% confidence interval. As the confidence interval widens, the probability that the confidence interval actually does contain the population parameter increases.
Yes, the confidence interval does not incorporate the true portion of immigrants.
n = 752
n = 597
a) n = 1035
b) n = 1037
a) n = 114
b) n = 49
c) No, a sample of students at the nearemainder college is a convenience sample, not an easy random sample, so it is incredibly possible that the results would not be representative of the population of adults.
Just surveying the adults at the nearemainder college is a convenience sample, which is not necessarily representative of the population.
Using a sample statistic to estimate the population proportion is using descriptive statistics.
Using a sample statistic to estimate the populace propercent is not making use of descriptive statistics; it is utilizing inferential statistics.
A instrumental worth is the area in the right-tail region of the typical normal curve.
A critical worth is a z-score connected through the area in the right-tail area of the standard normal curve, not the location itself.
The sample should be a voluntary response or convenience sample.
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The sample have to be a straightforward random sample as voluntary response or convenience samples present bias and also reduce the relicapacity of any type of poll results.