A random sample of size n = 50 is taken from a population with mean μ...
A random sample of size n = 50 is taken from a population with mean μ = −9.5 and standard deviation σ = 2. [You may find it useful to reference the z table.]
a. Calculate the expected value and the standard error for the sampling distribution of the sample mean. (Negative values should be indicated by a minus sign. Round "expected value" to 1 decimal place and "standard deviation" to 4 decimal places.)
b. What is the probability that the sample mean is less than −10? (Round “z” value to 2 decimal places, and final answer to 4 decimal places.)
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A random sample of size n = 50 is taken from a
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