A developer collects a random sample of the ages of houses from two neighborhoods and finds thatthe summary statistics for each are as shown Assume that the data come from a distribution that isNormally distributed Complete parts a through c below.a) Tast the mull hypothesis at 0.05 using the pooled 1-test, identify the null and atative hypotheses Chocose the correct answer belowOA H₂₂0M₂:14-1₂ OOCH₂ H Hy PROH₂H₂ DCompute the statistic. Let the difference of the sample means(Round to two deomal places as needed)MyMay-₂0ORHINONeighborhood Negoz1₂ 307,572-3572-473-7,124,9747

We have Given that n1 =20. n2 =35y¯1=57.2,y¯2=47.3s1 =7.57 , s2 =7.12Significance level…

Answered: A developer collects a random sample of…

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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learn.zybooks.com ne Submission ... D2L. 6-2 Participation Activities: Con... Z 5.2 MAT 240: Applied Statistics | Iza dStatistics home > 6.2: Confidence intervals for population means CHALLENGE 6.2.1: Confidence intervals for population means. ACTIVITY 389226.2543846.qx3zqy7 Jump to level 1 The additional growth of plants in one week are recorded for 11 plants with a sample standard deviation of 2 inches and sample mean of 10 inches. t* at the 0.05 significance level = Ex: 1.234 Margin of error = Ex: 1.234 Confidence interval = [ Ex: 12.345 Ex: 12.345 1 [smaller value, larger value] 1. Check Next Feedi 6.2.2: Relating confidence intervals to hypothesis testing (one sample). 16. qx3zqy7 Jump to level 1 n auto maker is interested in information about how long transmissions last. A sample of transmissions a onstantly and the number of miles before the transmission fails is recorded. The auto maker claims that th ansmissions can run constantly for over 150,000 miles before failure. The…
cONCLUSION: Leaf Area Index (LAI) was found to be independent on soil nitrogen content
IQ is normally distributed with a mean of 100 and a standard deviation of 16. A local school is considering what its minimum IQ score should be for admission. What should the minimum IQ score be so that 90% of all students in the area can qualify for admission? How can I calculate this using Excel or by hand
Choose the best option
Independent random samples from normal populations produced the results shown in the table to the right. Assume that the population variances are equal. Complete parts a through d below. a. Calculate the pooled estimate of o². 2 S. = (Round to four decimal places as needed.) b. Do the data provide sufficient evidence to indicate that μ₂ > μ₁? Test using α = 0.10. What are the null and alternative hypotheses? OA. Ho: H₁-H₂ = 0.10 Hai H- Hy 20.10 OC. Ho: H₁-H₂=0 Ha H-Hz0 Ş H₂ = 0.10 Ha: H - Hz≤0.10 Vi (1,0) Sample 1 1.3 2.9 1.6 2.9 2.8 More Sample 2 4.4 2.6 3.8 4.1
Given the null and alternative hypotheses, sample means, sample sizes, and population standard deviations shown to the right, conduct a hypothesis H, H.- O B. z> O C. z< Calculate the value of the test statistic. z= (Round to two decimal places as needed.) Vevidence conclude that the mean of population 1 is less than the mean of population 2 Since the test statistic V in the rejection region, V the null hypothesis. There is
HELP ASAP. info is given in the pic. 8) At which value for alpha (type I) error is the ANOVA model statistically significant?A) 0.05B) 0.025C) 0.01D) 0.005E All of the above 9) When using Fisher's LSD test with a = 0.05 to compare age categories, what is the LSDvalue when comparing the Under 20 group to the 20 to 29 group?A) 9.283B) -0.376C) 2.120D) 11.272E) -2.0 10) Treating the Age factor as a random effect, use the components of variance model toestimate the variance in systolic blood pressure (Y).A) 8.42B) 33.69C) 70.67D) 104.37E) 239.13
please answer a, b and d
You are conducting a multinomial hypothesis test for the claim that the 4 categories occur with the following frequencies: Ho: PA=0.2; PB = 0.1; Pc = 0.3; PD = 0.4 Complete the table. Round to 3 decimal places. (OE)² Category E A B C D Observed Expecte Frequency Frequency 19 36 41 31 What is the chi-square test-statistic for this data? Report all answers accurate to three decimal places.
1. The incidence of cancer among phosphate mine workers and their exposure to radiation was investigated. Cancer incidence was recorded among 60 phosphate mine workers who had 0-29 working level months (WLM) of exposure, 60 phosphate mine workers who had 30-89 WLM of exposure, and 60 phosphate mine workers who had 90-120 WLM of exposure. The number of cancer incidences for each group are presented in Table 1. Table 1: Two-way Table of Counts Cancer Incidence Exposure Level Yes No Total 0-29 WLM 20 40 60 30-89 WLM 33 27 60 90-120 WLM 43 17 60 Total 96 84 180 Perform a x? test, at the 5% level of significance, whether cancer incidence rates differ between the three levels of radiation among phosphate mine workers.
J 2 We want to estimate the proportion of defective parts produced by a machine and the estimation will be through a two-sided confidence interval and simple random sampling with replacement. a) Assuming a confidence level of 90% and a margin of error of 3%, what is the required sample size? (Assume maximum variance). b) Assuming a 90% confidence level and a 3% estimation error, what is the required sample size? (Assume maximum variance).
Use the t-distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from random samples, and if the sample sizes are small, assume the underlying distributions are relatively normal. Test Ho: M₁ = μ₂ vs Ha: ₁ ₂ using the sample results n₂ = = 80. Part 1 test statistic = i = (a) Give the test statistic and the p-value. Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. p-value = i 15.3, s₁ = 11.6 with n₁ = 100 and ₂ = 18.4, 82 = 14.3 with

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