The sample correlation coefficient between X and Y is 0.375. It hasbeen found out that the p-value is 0.744 when testing Ho :p = 0against the one-sided alternative H1:p < 0. To test Ho:p = 0 againstthe two-sided alternative H1: p not equal to 0. at a significance levelof 0.193, the p-value is0.744 /2O (0.744) 2O 1-0.744O (1 -0.744) 2

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Answered: The sample correlation coefficient…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose IQ scores were obtained for 20 randomly selected sets of twins. The 20 pairs of meaurements yield x̄ = 101.3, ȳ = 100.2, r = 0.826, P-value = , and ŷ = 8.19 + 0.91x, where x represents the IQ score of the twin born first. Find the best predicted value of ŷ given that the twin born first has an IQ of 109? Use a significance level of 0.05.
9.1/4 Identify the test statistic p-value
A study by researchers addressed the question of whether the mean body temperature of humans is 98.6◦F. Another researcher challenged this conclusion by conducting a separate study, where he obtained the body temperatures of 93 healthy humans, and got sample mean of 97.8◦F At the 1% significance level, do the data provide sufficient evidence to conclude that the mean body temperature of healthy humans differs from 98.6◦F? Assume that σ = 0.63◦F.
15)
The standard treatment for a disease works in 0.65 of all patients. A new treatment is patients (of similar general health) is proposed. Is it better? An initial clinical trial of n = 100 conducted: 73 people are cured. Assume the selection of patients is random (a) Perform a significance test to test whe ther the treatment is better at a 10% significance level. lp Z-=l.v5. = 73 = .73 1 oo we are go corfident that th e populaticr.9rofortienl be be (b) Find the power of the test under the alternative of Ha 0.81 0 ,81 2- neu P P.(I-P toYl
Given a result of t (30) = 1.55 for a one-tailed paired samples t-test, What is the sample size?
Q4) Suppose that when data from an experiment was analyzed, the P-value for testing Ho: u = 100 versus Ha: µ < 100 was calculated as 0.047. At the 0.01 significance level, Họ would
Let sigma denotes true average serum receptor concentration for all pregnant women. The average for all women is known to be 5.63. It is reported that P-value > 0.10 for a test of H0: sigma = 5.63 versus Ha: u does not equal 5.63 based on n = 176 pregnant women.Using a significance level of 0.01, what would you conclude?
10.4 In a one-way ANOVA test, the test statistic is F = 4.25. The rejection region is F > 3.06 for the 5% level of significance, F > 3.8 for the 2.5% level of significance, and F > 4.89 for the 1% level of significance. For this test, which of the following is a valid statement about the approximate p-value? a. It is between 0.01 and 0.025 b. .It is approximately 0.05. c. It is between 0.025 and 0.05 d. .It is greater than 0.05.
What is the test statistic and p-value? Because the P-value is ▼ greater less than the significance level 0.05, there ▼ is not is sufficient evidence to support the claim that there is a linear correlation between selling price (in hundred thousands) and the list price (in hundred thousands) of homes sold for a significance level of α=0.05.
Researchers have collected data on the rate of BO disease from a random sample of persons across the country aged 50 and above (n = 250). In particular, researchers are curious in studying a claim made by the cig industry that there is a negative relationship between smoking cigarettes and the risk of contracting BO’s. The researchers have calculated a Pearson’s r correlation of −.709 for the two variables. The researchers have also calculated (using a computer) a significance value of .005.In a paragraph of five to six sentences, based on the results from the correlation, what conclusions can the researchers make about the relationship between smoking and getting BO’s? Ensure that you mention the unit of analysis, the direction of the relationship, the strength of the relationship, whether the findings are statistically significant, and how accurately the results would reflect the population. Do these findings support the cig industry’s claim? Why or why not?
Suppose that you want to do statistical significance tests for four correlations, and you want your EWa(alpha) to be .05. What PCa(alpha) would you use if you apply the Bonferroni procedure? please read the (a) as alpha, as i couldn't write it out correctly

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