Question: 1. Use Normal Approximation to Binomial to find the probability of at least 28 successes if the probability of success is 30% and the trial

1. Use Normal Approximation to Binomial to find the probability of at least 28 successes if the probability of success is 30% and the trial size is 80

3. For sampling proportion (or Normal to Binomial), if the probability of success is 0.40, what is the minimum sample size we must have?

4. The weight of pebbles is uniformly distributed between 25 & 45 grams. You pick a pebble randomly. What is the probability that it'll weigh between 37 & 47 grams?

5. If the margin of error for the population mean for 99% Confidence Level is 39, what was the Standard error of the sample mean?

6. If the margin of error for the population mean for 99% Confidence Level is 39, what was the population standard deviation if the sample size selected was 50?

7. If the area to the left is 81% for a Normal Distribution, what z-score should be used?

8. X is uniformly distributed between 14 and 23. What is the Expected value of X?

9. If the sample mean is 70 and standard error of the sample mean is 8, what will be the 90% Confidence Interval assuming Normal Distribution? The sample size was 30.

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