Experience has shown that radon gas level is approximately, Ask an Expert

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Q1) Assume that newspaper conducts survey of random sample of 120 registered voters to predict winner of a local election. Republican candidate was favoured by 62 of the respondents.

Create and interpret a 99% confidence interval for π, true proportion of voters who favour Republican candidate.

Q2) A random sample of houses in LA is chosen and level of radon gas is measured for each house in sample. Values gathered are given below in parts per million (ppm.) Experience has shown that radon gas level is approximately normally distributed for this population.

5,4,8,13,6,7,3,9,8,4,11,8

Create the 95% confidence interval for μ.

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