1. A study compared the number of tree species in unlogged forest plots to similar plots logged 8 years earlier.Independent random samples of both logged and unlogged plots were analyzed and the number of tree species wasrecorded. Tables 1 and 2 present the Shapiro-Wilk normality test for both types of forest plots and the IndependentSamples t-test results. Use the information presented in these tables to answer the questions.Table 1: Tests of NormalityTests of NormalityKolmogorov-SmirnovShapiro-WilkForest PlotStatisticdfSig.StatisticdfSig.Tree_Species Logged.18112.200.93612.444Unlogged.11014.200.94514.480*. This is a lower bound of the true significance.a. Lilliefors Significance CorrectionTable 2: Independent Samples TestIndependent Samples TestLevene's Test for Equality ofVariancest-test for Equality of Means95% Confidence Interval of theDifferenceMeanStd. ErrorFSig.tdfSig. (2-tailed)DifferenceDifferenceLowerUpperEqual variancesassumedTree_Species2.751.110-2.62724.015-3.011901.14651-5.37818-.64563Equal variances notassumed-2.69723.271.013-3.011901.11661-5.32030-.70351We want to test, at the 1% level of significance, whether the mean number of species in a logged forest plot is different tothat found in an unlogged forest plot. To perform this test, we assume that the population standard deviations of loggedand unlogged forest plots are equal. b. The correct hypothesis statement for this test is:O Họ : µ1 – Mz0 vs Ha : µ1 – Hz < 0 (a= 0.01)O Họ : µ1 – Mz0 vs Ha : µ1 – Hz > 0 (a = 0.01)O Ho : µ1 – H2 = 0 vs Ha : µ1 – H2 <0 (a = 0.01)O Ho : µ1 – µz = 0 vs Ha : µi – H2 #0 (a = 0.01)

The test to check whether the mean number of species in a logged forest plot is different to that…

Answered: The correct hypothesis statement for…

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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The mean ±1 sd of ln [calcium intake (mg)] among 25females, 12 to 14 years of age, below the poverty level is6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake(mg)] among 40 females, 12 to 14 years of age, above thepoverty level is 6.80 ± 0.76 4-What is the p-value corresponding to your answer toProblem 8.4?
State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain. (a) t=1.826 (b) t=0 (c) t=−1.751 (d) t=−1.822 -404t t0=−1.767 A normal curve is over a horizontal axis labeled z from negative 4 to 4 in increments of 1 and is centered on 0. Vertical line segments extend from the horizontal axis to the curve at t@Sub{0}=negative 1.767, where t@Sub{0}=negative 1.767 is to the right of 0. The area under the curve to the right of t@Sub{0}=negative 1.767 is shaded. (a) For t=1.826, should you reject or fail to reject the null hypothesis? A. Reject H0, because t>−1.767. B. Fail to reject H0, because t<−1.767. C. Fail to reject H0, because t>−1.767. D. Reject H0, because t<−1.767.
A group of researchers wanted to determine if the mean HDL of male patients is less than female patients. HDL from one hundred patients were collected and results are as follows: Mean±SD Gender n 28 72 Male Female 1.1318 +0.16191 1.2828 +0.11039 Do these results show sufficient evidence that the mean HDL of male patients is less than female patients? Test at 5% level of significance. S Let the critical value be t = 1.686 if t > 0 or t = - 1.686 if t ≤ 0. Which of the following is the correct conclusion? O There is no sufficient evidence that the mean HDL of male patients is less than female patients. O There is sufficient evidence that the mean HDL of male patients is less than female patients. O There is no sufficient evidence that the mean HDL of female patients is less than male patients. O There is sufficient evidence that the mean HDL of male patients is not equal to the female patients.
An economic instructor at UCF is interested in the relationship between hours spent studying and total points earned in a course. Data collected on 19 students who took the course last semester follow # of observation(s) n = 19 # of independent variable(s) = 1 SSR = 3,882 SSE = 256 Find the Value for MSE (Use two decimals)
In SD(X-mu/sigma)=1/sigma * SD(X) What happened to the mean mu?
One hundred people were surveyed, and one question pertained to their educational background. The results of this question and their genders are given in the following table. College degree (D) No college degree (D') Total 0.333 0.996 0.184 0.668 Female (F) Male (F') Total 50 50 100 33 35 68 17 15 32 Calculate the test statistic for a Chi-Square test of dependence.
Einar Óli has measured the area of scallops on two places in Breiðafjörður and used a t-test to investigate whether there is a difference in the area of scallops in those two places. A type-ll error occurred when Einar Óli conducted his hypothesis test. What happened? 1. There is no difference in the average area of scallops at those two places but Einar Óli rejected the alternative hypothesis and concluded that there difference. 2. There is no difference in the average area of scallops at those two places but Einar Óli concluded that there is a difference. 3. There is no difference in the average area of scallops at those two places but Einar Óli made no claims. 4. There is a difference in the average area of scallops at those two places but Einar Óli made no claims. 5. OR-command:
For Z-test used to analyze data on tablet weight in a batch with Ho: u = 300 mg and at a = 0.05. If a sample was taken from the batch and Z-score of the mean tablet weight of the sample was correctly calculated as 1.9. P-value is which suggest that, O 0.047, The mean tablet of the batch is not significantly different from 300 O 0.0574, The mean tablet of the batch is significantly different from 300 O 0.0287, The mean tablet of the batch is not significantly different from 300 O 0.047, The mean tablet of the batch is significantly different from 300 O0.9713, The mean tablet of the batch is significantly different from 300 0.9713, The mean tablet of the batch is not significantly different from 300 0.0287, The mean tablet of the batch is significantly different from 300 0.0574, The mean tablet of the batch is not significantly different from 300 Next pc
What is R hat2 What is R hat2
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