# Posts by johnprabhakaran

Total # Posts: 3

**statistics**

which of the following statements is true? Justify your answer with an example. i)When the margin of error is small, the confidence level is high. ii)When the margin of error is small, the confidence level is low. iii)A confidence interval is a type of point estimate. iv) A ...

*November 15, 2011*

**statistics**

Ram earned a score of 940 on a national achievement test. The mean test score was 850 with a standard deviation of 100.what proportion of student had a higher score than Ram?(Assume that test scores are normally distributed)

*November 15, 2011*

**statistics**

In a state,52%of the voters supports party-R, and 48% supports party-D. In second state 47% of the voters supports party-D. Suppose 100 voters are surveyed from each state. Assume the survey uses simple random sampling. what is the probability that the survey will show a ...

*November 15, 2011*

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