Why is the df value decreased by SPSS if we fail the Levene’s test?
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Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…
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Q: (2) S 1 x= V1-x²
A: Solution
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- Why is the df value decreased by SPSS if we fail the Levene’s test?
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- A medical social worker is interested in examining the relationship between patients who receive social support by family members (yes/no) and the patients’ outcome (failure/success). She collected data over a period of a month (N=100). A chi square analysis revealed the following: χ2= 5.65, df = ?, p = .01. 1. Was a chi-square analysis appropriate to analyze these variables? How do you know?You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly more than 82%. With H1 : p >> 82% you obtain a test statistic of z=1.203z=1.203. Find the p-value accurate to 4 decimal places.p-value =You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly different from 10%. With H1 : p ≠ 10% you obtain a test statistic of z = 2.155 . Find the p-value accurate to 4 decimal places.
- Suppose you are testing H0:μ=96 against Ha:μ< 96. From an SRS of 82 individuals, you compute xˉ= 104 and s= 6.4. What is the value of the t-test statistic in this test? Round your answer to three decimal places. suppose you are testing H0:μ=108 against Ha:μ< 108. From an SRS of 68 individuals, you compute xˉ= 110 and s= 6.4. What are the degrees of freedom for the distribution of test statistic tt?Solve it correctly please. I will rate accordingly with 4votes.Suppose you obtain the following regression model, E[y]=91+79*x1 +20*x1*x2. What is the impact of a 39 unit change of x1 on the expected value of y when x2 is at its mean of 40?
- Suppose you run a regression y=alpha + beta*x + u. You know that the model sum of squares equal 2998.9, residual sum of squares equals 571,612.8, and residual mean squares (MS) squals 412.41. What is the number of observations in your sample?You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly less than 0.77.With H1 : p << 0.77 you obtain a test statistic of z=−1.477z=-1.477.Find the P-value accurate to 4 decimal places.P-value =Consider the problem of diagnosing a rare disease. Let’s say the occurrence of thisdisease is one in a thousand i.e. P(D = +) = 0.001. There is a test T which correctlyidentifies the disease 99.9% of the time, i.e. P(T = +|D = +) = 0.999. However, italso has a false positive rate of 0.02, i.e. P(T = +|D = −) = 0.02 i. If a random person from the population is tested, what is the probability they willreceive a positive test, i.e. P(T = +)? ii. Given that the test is positive, what is the probability that the person has the disease,i.e. P(D = +|T = +)?
- do fastSuppose μ₁ and ₂ are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of braking systems. The data follows: m = 8, x = 115.6, $₁=5.09, n = 8, y = 129.5, and s₂ = 5.33. Calculate a 95% CI for the difference between true average stopping distances for cars equipped with system 1 and cars equipped with system 2. (Round your answers to two decimal places.) USE SALT Does the interval suggest that precise information about the value of this difference is available? O Because the interval is so narrow, it appears that precise information is available. O Because the interval is so wide, it appears that precise information is available. O Because the interval is so narrow, it appears that precise information is not available. O Because the interval is so wide, it appears that precise information is not available.After testing 40 participants, a significant x2obt of 13.31 was obtained. With a .05 and df 2, how would this result be reported in a publication In your own words please not copied from the internet
