Check the word file , and add the answers under each question and would like to get the answers on word document with graphs
Section 9.2 State hypothesis H0,H1 and draw conclusion
Section 9.3(Problem 1,9)
Section 9.4(Problem 1 only a and b)
Section 9.5(Problem 1 part a)
Problem 8 on ch.9 supplement exercises
Reserve Problem Chapter 9 Section 2 Problem 8
Humans are known to have a mean gestation period of 280 days with a standard deviation of about 9 days.
A hospital wondered whether there was any evidence that their patients were at risk for giving birth prematurely. In a random sample of 70 women, the average gestation time was 274.7 days.
a. Is the alternative hypothesis one- or two-sided?
b. What is the P-value of the test statistic?
Reserve Problem Chapter 9 Section 3 Problem 1
We have 5-year statistics of the average amount of wheat crop (tons) harvested from 1 km2 per year, the results are as follows:
560, 525, 496, 543, 499. Test the hypothesis that the mean wheat crop is 550 tons per 1 km2 per year (α = 0.05) and choose the correct answer. Determine a 95% confidence interval on the mean wheat crop. Determine whether the hypothesis that the mean wheat crop is 550 tons per 1 km2 per year (α = 0.05) is true based on the 95% confidence interval?
Reserve Problem Chapter 9 Section 3 Problem 9 Human oral normal body temperature is believed to be 98.6∘ F, but there is evidence that it actually should be 98.2∘ F
[Mackowiak, Wasserman, Steven and Levine, JAMA (1992, Vol. 268(12), pp. 1578–1580)].
From a sample of 52 healthy adults, the mean oral temperature was 98.285 with a standard deviation of 0.625 degrees.
a. What are the null and alternative hypotheses?
b. Test the null hypothesis at α = 0.05. Find t0. Is it possible to
reject H0 hypothesis at the 0.05 level of significance?
c. Construct a 95% confidence interval to answer the same question.
Reserve Problem Chapter 9 Section 4 Problem 1
A group of 15 students has performed an experiment, they measured the coefficient of thermal expansion for aluminum. The results are as follows (10−6 K−1):22.0, 25.9, 25.6, 23.1, 22.7, 25.6, 24.9, 21.9, 26.1, 24.3, 23.5, 20.7, 21.4, 23.5, 20.4.
a. Is there strong evidence to conclude that the standard deviation in this experiment exceeds 3? Use α = 0.05.
b. Find the P-value for this test.
Reserve Problem Chapter 9 Section 5 Problem 1
A manufacturer of soap bubble liquid will test a new solution formula. The solution will be approved, if the percent of produced parisons, in which the content does not allow the bubbles to inflate, does not exceed 7%. A random sample of 700 parisonscontains 50 defective parisons. Use the z-values rounded to three decimal places to obtain the answers.
a. Formulate and test an appropriate set of hypotheses to determine whether the solution can be approved. Use α = 0.05.
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