Let X be a random variable whose mean is 128 and standard deviation is 5. A sample of 70 is randomly selected. Draw a normal curve with the correct shaded region for each. 1. Find the probability that the sample mean is less than 127.4. 2. Find the probability that the sample mean is greater than 126.9. 3. Find the probability that the sample mean is between 128.1 and 129.
Let X be a random variable whose mean is 128 and standard deviation is 5. A sample of 70 is randomly selected. Draw a normal curve with the correct shaded region for each. 1. Find the probability that the sample mean is less than 127.4. 2. Find the probability that the sample mean is greater than 126.9. 3. Find the probability that the sample mean is between 128.1 and 129.
Question
Let X be a random variable whose mean is 128 and standard deviation is 5. A sample of 70 is randomly selected. Draw a normal curve with the correct shaded region for each.
1. Find the probability that the sample mean is less than 127.4.
2. Find the probability that the sample mean is greater than 126.9.
3. Find the probability that the sample mean is between 128.1 and 129.
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