A hospital president claims that the average salary of registered nurses at her hospital is more than $57,000. You test this claim by surveying 37 registered nurses at this hospital and find they have a mean salary of $57,425. Assume the population standard deviation is $1,750. At the 0.10 level of significance, is there enough evidence to SUPPORT the claim of the hospital president? 1.) Is this a hypothesis test for mean or proportion? If it's a test for mean, do we know the population standard deviation? 2.) Based on your answer in #1, which calculator will you use: A.) Mean - σ Known, B.) Mean - σ Unknown or C.) Proportions 3.) Will we use a Z-test or t-test? How do you know?
A hospital president claims that the average salary of registered nurses at her hospital is more than $57,000. You test this claim by surveying 37 registered nurses at this hospital and find they have a
1.) Is this a hypothesis test for mean or proportion? If it's a test for mean, do we know the population standard deviation?
2.) Based on your answer in #1, which calculator will you use:
A.) Mean - σ Known, B.) Mean - σ Unknown or C.) Proportions
3.) Will we use a Z-test or t-test? How do you know?
4.) What is the direction of the tail? Left, right or two?
5.) Complete the Hypothesis statement below with the arrows in the correct direction. Mark an X next to the claim.
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