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Perform the Test H0 : m ≥ 22, versus HA : m < 22 given significance level a = .01 and n=100, sample mean X-bar= 21.68 and standard deviation, s=1.3 ( show calculated and critical values of the test statistic)
A TV newscaster reports the results of a poll of voters, and then says, The margin of error is plus or minus 4%. Explain carefully what that means.
a regional director responsible for business development in the state of pennsylvania is concerned about the number of
people arrive at a college admissions office at rate 1 per minute. when k people have arrive a tour starts. student
A production process produces 90% non-defective parts. A sample of 10 parts from the production process is selected. What is the probability that the sample will contain 7 non-defective parts?
a biologist wants to test the null hypothesis that the mean mean wingspan of a certain kind of insect is 12.3mm against
Jim has weighted GPA of 3.84. His high school GPA's are normally distributed with a mean of 2.9 and a standard deviation of 0.5. Kim's high school uses unweighted GPA's and she has a GPA of 3.57. GPA's are also normally distributed in her high sch..
one measure of the risk or volatility of an individual stock is the standard deviation of the total return capital
Is there sufficient evidence at the alpha =0.05 level to support the researcher's claim?
Describe an experiment that would allow comparison of the reduction in knee pain for those who did 1 hour of tai chi twice weekly to the reduction
The Red Cross honors and recognizes its best volunteers from time to time. One of the Red Cross offices has received 12 nominations for the next group of 4 volunteers to be recognized. Eight of these 12 nominated volunteers are female. If the Red ..
a health care worker wishes to see if the average number of family day care homes per county is greater than the
Can the inoculation be regarded as (effective against the disease at 5% level of significance - Find the expected value of the number of good components in this sample
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