(b) For a chi-squared distribution, find k when sample size is 30. P(k < X2 < 45.72) = 0.925
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(b) For a chi-squared distribution, find k when sample size is 30. P(k < X2 <...
suppose x is the mean of a random sample of size n=36 from the chi-squared distribution with 18 degrees of freedom. use the central limit theorem to approximate the probability P(16 < x < 20) ?
find the chi-squared value x2L corresponding to a sample size of 7 and a confidence level of 99%
Find the critical values chi squared Subscript 1 minus alpha divided by 2χ21−α/2 and chi squared Subscript alpha divided by 2χ2α/2 for a 95% confidence level and a sample size of n=30
Please Help with BOTH
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Determine the following: (a) The 95th percentile of the chi-squared distribution with v 7 (Round your answer to three decimal places.) (b) The 5th percentile of the chi-squared distribution with v 7 (Round your answer to three decimal places.) (c) P(11.689 2 s 38.076), where2 is a chi-squared rv with v 23 (d) P<14.611 orx2 >37.652), where2 is a chi-squared rv with v = 25 You may need to use the appropriate table in...
Given a random sample size of 10 from a normal distribution, find k such that: P(k < T < 4.781) = 0.002 a.3.690 b.8.610 c.3.497 d.3.581
Let X be chi-squared with k = 5 degrees of freedom. (a) What is P[X > 1]? (This exact calculation requires some serious integration) (b) Find P[X > 1] with the normal approximation, i. e., approximate that probability assuming X ~ N(mu, sigma squared), where mu and sigma squared are the mean and variance of a Gamma(5/2, 1/2).
8. Degrees of freedom for chi-squared tests are determined by sample size. True or False 7. If a correlation between two variables is negative, that means there is no linear relationship between them. True or False 2. For a chi-square test, if the observed number of cases in your sample fits what you expect given your knowledge of the population, you would reject the null hypothesis. True or False 1. A two-tailed hypothesis will have more statistical power than a...
Let Y~ xî (i.e. Y follows a chi-squared with 1 degree of freedom), let Xn = n-1/2 y - n1/2 (a) Show that Xn 4 X where X ~ N(0,2) (Hint: look up what is the mean and variance of a chi-squared distribution?) (b) n= 30. Find the exact P(Y > 43.8) using a chi-squared table. (c) Approximate P(Y > 43.8) for n = 30 using a normal approximation
(a) Let X, have a chi-squared distribution with parameter V, and let X, be independent of X, and have a chi-squared distribution with parameter vz. Show that X, + X, has a chi-squared distribution with parameter v, + V Let Y = X1 + Xy. Identify the correct expression for Fly). Fyly) = (f1 +49 (0) BM={{1*(**) 2*3)**- _jei OFW - 1 -{{49)..:@) ib) dx1 FY) = -xq12 dx + -*2/20 1²ax 2 1/2 O Fy(y) :{"(****): 19). x 22...
Can you help find chi squared value and p value please?
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The table below includes results from polygraph (lle detector) experiments conducted by researchers. In each case, it was known if the subjected lied or did not lie, so the table indicates when the polygraph test was correct. Use a 0.05 significance level to test the claim that whether a subject lies is independent of the polygraph test indication. Do the results suggest that polygraphs are effective in distinguishing...