A city has 4 voting districts. Records from previous years show the proportion of registered voters that votedin previous elections for each district. A political analyst wants to see if those proportions have changed forthis year's upcoming elections. The political analyst randomly samples 81 registered voters and asks themwhich district they live in and if they have voted yet.Ho: PA = 0.3; PB = 0.1; pc = 0.2; PD = 0.4Test the claim that there is a difference in the proportions using a a= 0.05. Round all answers to at least 4decimal places.a. Complete the table.District Observed ExpectedABCDTotal347172381(O - E)²E000000b. Compute the chi-square test-statistic for this data?x² = 1c. Compute the chi-square Critical Value?Critical Value =d. What would be the correct conclusion for this hypothesis test?O Reject the null hypothesis, there is not a statistically significant difference in the proportions.O Fail to reject the null hypothesis, there is a statistically significant difference in the proportions.Submit QuestionReject the null hypothesis, there is a statistically significant difference in the proportions.O Fail to reject the null hypothesis, there is not a statistically significant difference in the proportions.

Ho : pA=0.3, pB=0.1, pC=0.2, pD=0.4 Note: According to bartelby question answer guidelines an…

Answered: decimal places. a. Complete the table.…

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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Mean 1001 206 Levene's Test for Equality of Variances Sig. 15.578 <.001 .510 1.402 df Sig. (2-tailed) 1205 .014 261.832 035 -3.168 -3.168 Std. Error Difference 3. Do Whites spend a significantly different amount of time on the internet (WWWHR) than Blacks? Group Statistics Std. Error Race of respondent N Std. Deviation Mean Www.hours per week WHITE 13.29) (16.124) BLACK 16.46 20.120 Independent Samples Test t-test for Equality of Means Mean t Difference Www hours per week -2.455 Equal variances assumed -2.124 Equal variances not assumed 1.291 1.492 95% Confidence Interval of the Difference Lower Upper -5.701 -6.106 -.636 -.231
Q9. A Random Variable X has an unknown distribution, a known mean of 10 and an unknown variance, oʻ. To test a claim that the distribution is no longer 10, a random sample of 100 of X was collected which gave a sample mean, x of 9.8 and a sample variance, s? = 16. Working at the 5% Significance level what is the reject region? A. z 1.96 2 %3D B. z>-1.96 AND z 2.57 D. z 1.96 О А. А О В. В О С. С O D. D
See below. I really need help with this.
a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Ho: uv (Please enter a decimal) c. The test statistic z v (please show your answer to 3 decimal places.) %3D d. The p-value = (Please show your answer to 4 decimal places.) %3D e. The p-value is> va f. Based on this, we should fail to reject vthe null hypothesis. g. Thus, the final conclusion is that ...
0.05 level of significance. Solve for appropriate test statistic and show written work!
A middle school teacher believes that a reading rewards program results in a higher number of pages read per year after the program is completed. The teacher chooses a simple random sample of students and records the number of pages read per year before starting the program and after the program is completed. The results of the study are below What are the population parameters? Pick Before 813.25 192250.25 182875.22 After 904.95 What is the level of significance? Ex: 0.12 Mean Variance Observations Hypothesized Mean Difference 100 100 Is the two-sample hypothesis test a paired or unpaired t-test? Pick 198 t Stat P[T< t) one-tail tCitical one-tail P[T<=t) two-tail t Critical two tal Confidence Level What is the null hypothesis Ho? Pick 0.068 1.653 What is the alternative hypothesis H.? Pick 1.972 95% Should Ho be rejected or does Ho fail to be rejected? Pick What conclusion can be drawn from the data? Pick v evidence exists to support the claim that the mean number of pages read per…
Step 1 of 3. State the null and alternative hypotheses for the test. Step 2 of 3. Compute the value of the test statistic. Round your answer to three decimal places Step 3 of 3. Draw a conclusion and interpret the decision.
9
Refer to the below table. Using an alpha = 0.05, test the claim that IQ scores are the same for children in three different blood lead level groups: low lead level, medium lead level, and high lead level). One-Way Analysis of Variance Summary Table for IQ Measurements for Children among Three Blood Lead Level Groups: Low Lead Level, Medium Lead Level, and High Lead Level. Source df SS MS F p Between-group (treatment) 2 469.1827 2677.864 2.30 0.104 Within-group (error) 118 203.6918 11745.05 Total 120
Which of the following is not a sample property of OLS? a. Sample covariance of each included variable and the residuals is zero b. the sum of all residuals is zero c. the average of all residuals is zero d. the covariance of x and y is on the regression line.
M. 山 Find the standardized test statistic, z, to test the claim that p, < P2. The sample statistics listed below are from independent samples. n = 550, x, = 121, and n, = 690, x, = 195 %3D O A. 1.116 O B. -2.132 OC. -2.513 O D. -0.985 P Type here to search 59 F5 F9 F11 %23 3. 5. 6. 8. A G H. B. N Alt
Is psychiatric history dependent on where the mother lives (country or city)? The test statistics for this hypothesis test are.... How to run t-test? which variable goes where? I attached images, is that correct and where to get the t statistic and p-value?

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