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The mean Systolic blood pressure for the population of adults age 50-54 is 125 mmHg with a standard deviation of 5 mmHg. It is known that Systolic blood pressure is Normally distributed. You think that a sample of 25 adults' Systolic blood pressure measurements will be higher than average because they are experiencing extreme stress due to the Covid-19 emergency.
What type of test you should use to test this relationship?
What is the correct hypotheses in symbol notation (or words if symbol is not appropriate)?
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. Out of 50 pregnancies
(a) Provide a written description of the complement event of ( S OR P ) .
What is the probability that there will be exactly one set of triplets among 700 births in a large hospital?
Predict with 95% confidence the test score at a school where 50% of the mathematics teachers have mathematics degrees, the mean age is 43, and the mean annual income is $48,30.
When restricted to the 239 active traders in the sample, Pew reports that 45% rely on the Internet for investment information. Find a confidence interval for this statistic.
in a survey 42 of the repsondents stated they talk to their pets on the answering machine or telephone. a vet believed
Nitrites are often added to meat products as preservatives. In a study of the effect of these chemicals on bacteria
you learn the average gre score of private college graduates pursuing their mph is 1500 with a standard deviation of
A plumbing company has found that the length of time, in minutes, for installing a bathtub is normally distributed with mean µ = 160 minutes and standard
Research has found that completing an ethical course in school or business significantly predicts more ethical behavior.
In a random sample of 12 adults from the U.S., the mean waste recycled per person per day was 1.4 pounds with a sample standard deviation of .3 pounds. Assume that the distribution of x = waste recycled per person per day is normal.
1. at one point during a fatigue test the rate of crack growth is measured as 0.57mmcycle. if the constants are known
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