Is there enough evidence to question Harley’s claim of 10 decibels?

A researcher studying stress is interested in the blood pressure measurements of chief executive officers (CEOS) of major corporations. He believes that the mean systolic blood pressure, H, of CEOS of major corporations is less than 136 mm Hg, which is the value reported in a possibly outdated journal article. He plans to perform a statistical test. He measures the systolic blood pressures of a random sample of CEOs of major corporations and finds the mean of the sample to be 128 mm Hg and the standard deviation of the sample to be 16 mm Hg. Based on this information, answer the questions below. What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the test? |Ho: H is ? |H,: µ is ? In the context of this test, what is a Type II error? A Type II error is ? fact, µ is ? v the hypothesis that u is ? when, in Suppose that the researcher decides not to reject the null hypothesis. What sort of error might he be making? ? Continue Save For Later Submit…

I need help with understanding standard deviation.  How to calculate it from the mean?

If the standard deviation of a sample is 4.3 for 28 data values, what would the standard deviation be for the population from which the sample was drawn?

STATISTICS.docx - Google Docs + A docs.google.com/document/d/1Xgqq34HC4kub_OY7HprnxliVKF2wTIZI/edit 2. One wishes to estimate the average age of a student population. It is known that the standard deviation is 2 years. A sample of 50 students is taken and the mean of these students is 23.2 years. What is the point estimate of the population mean? b. Find a 95% confidence interval for the pop. mean. а. 3:26 AM P Type here to search W 36°F Mostly clear * 4) 12/15/2021

Please type