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Suppose the mean systolic blood pressure in a group of individuals is 150 mmHg, with a standard deviation of 15. Assuming SBP follows a normal distribution in this population, cimpute the following:
A.) P(135< value< 165)
B.) P (value>165)
C.) P (value<135)
D.) P(a39.5< value< 160.5)
What are the null and alternative hypothesis for this? What is a type II error in context of this test? Suppose that the researcher deceides not to reject the null hypothesis what sort of error might he be making?
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.
1.i use computer software to do the following. i generate ten random numbers from a n500 100 distribution. from these
if a white-collar worker is chosen at random from this group, what is the probability that he or she prefers light beer (to reg. beer or none at all)?
Suppose that four American adults are asked if they ate at table-service restaurants last week. What is the probability that all of them say yes?
The sample mean life is 5.5 years with a standard deviation of 0.6 years. If you were constructing a 99% two-sided confidence interval estimate, the lower limit would be?
Senator Hayes is considering a a run for the U.S. presidency, but she is only 35 years of age, which is the minimum required age. While investigating this issue, she finds the ages of past presidents when they were inaugurated
the random variable x has mean 9 and standard deviation 8. what is the mean and the variance of 2xrespectively?explain
Would you recommend test- ing H0 : m = 5 versus Ha : m> 5 or H0 : m= 5 versus Ha : m
The true breaking strength of our trash bags when using a 95% confidence interval. What is the minimum number of bags we should sample?
Cornwell uses these forecasts for its production planning. It manufactures several types of glass, and demand is aggregated across products and measured in pounds.
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