Chapter 13: Q. 11 (page 547)
Consider a curve with
Find the value with an area to its right.
Short Answer
From the above plot the value with area to its right is .
Chapter 13: Q. 11 (page 547)
Consider a curve with
Find the value with an area to its right.
From the above plot the value with area to its right is .
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Get started for freeA study by E. Anionwu et al. published as the paper "Sickle Cell Disease in a British Urban Community", measured the steady-state hemoglobin levels of patients with three different types of sickle cell disease: HB SS, HB ST and HB SC. The data are presented on the WeissStats site.
a. Obtain individual normal probability plots and the standard deviations of the sample.
b. Perform a residual analysis
c. use your results from part (a) and (b) to decide whether conducting a one-way ANOVA test on the data is reasonable. If so, also do parts (d) and (e).
d. use a one-way ANOVA test to decide, at the\(5%\) significance level whether, the data provide sufficient evidence to conclude that a difference exists among the means of the populations from which the samples were taken.
e. Interpret your results from part (d).
Refer to Exercise 13.74. Suppose that you have obtained a confidence interval for each of the two differences, and . Can you be confident of both results simultaneously, that is, that both differences are contained in their corresponding confidence intervals? Explain your answer.
How many degrees of freedom does an -curve have? What are those degrees of freedom called?
In this problem, consider an F-curve with .
Identify the degrees of freedom for the denominator.
Show that, for two populations, , where is the pooled variance defined in Section 10.2 on page 407 . Conclude that is the pooled sample standard deviation, .
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