Do the poor spend less time in the shower than the rich? The results of a survey asking poor and rich peoplehow many minutes they spend in the shower are shown below.Poor 23 27 38 3924 2917 32 31 3814 25 33 36 38 50 25Assume both follow a Normal distribution. What can be concluded at the the a= 0.10 level of significancelevel of significance?For this study, we should use Select an answerRich: 33 14 24 29a. The null and alternative hypotheses would be:Ho: Select an answerH₁: Select an answerb. The test statistic ?Select an answerSelect an answer=myopenmath.com@Select an answerSelect an answer(please enter a decimal)(Please enter a decimal)O(please show your answer to 3 decimal places.)(Please show your answer to 4 decimal places.)c. The p-value =d. The p-value is ναe. Based on this, we should Select an answer the null hypothesis.f. Thus, the final conclusion is that ...The results are statistically significant at a = 0.10, so there is sufficient evidence to concludethat the mean time in the shower for the ten poor people that were surveyed is less than themean time in the shower for the eleven rich people that were surveyed.O The results are statistically insignificant at a = 0.10, so there is statistically significant evidenceto conclude that the population mean time in the shower for the poor is equal to the populationmean time in the shower for the rich.The results are statistically significant at a = 0.10, so there is sufficient evidence to concludethat the population mean time in the shower for the poor is less than the population mean timein the shower for the rich.O The results are statistically insignificant at a = 0.10, so there is insufficient evidence to concludethat the population mean time in the shower for the poor is less than the population mean timein the shower for the rich.

The random variable time follows normal distribution.There are two independent samples which are…

Answered: how many minutes they spend in the…

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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Using the following information select the number that better estimates the upper 90% confidence interval for the variance. Observation 1 2 3 4 5 6 22 O 4.7 4.4 40 27 19 7 8 9 10 11 Data 79 78 85 79 79 78 76 77 81 85 80
Question Help Instructor-created question Sham Magnet H1 Researchers conducted a study to determine whether magnets can affect back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples H are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Use a 0.05 significance level to test thế claim that those treated with magnets have a different mean reduction in than those given a sham treatment. P2 10 10 0.54 0.45 5. 0.62 1.49 pain What are the null and alternative hypotheses? O A. Ho: H1 H2 O C. Ho H1 H2 O D. Ho: H1= H2 H1 P1 H2 ents Upper critical value is: (Round to three decimal places as needed.) Lower critical value is: (Round to three decimal places as needed.) cess Library Click to select your answer(s) and then click Check Answer. Clear All Check…
Treatment Placebo 3. H1 H2 table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level for both parts. A study was done using a treatment group and a placebo group. The results are shown in the 27 40 In 2.39 2.65 0.95 0.57 a. Test the claim that the two samples are from populations with the same mean. What are the null and alternative hypotheses? O A. Ho: H1 = H2 O B. Ho: H1H2 D. Ho: H1 H2 The test statistic, t, is (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State the conclusion for the test. O A. Fail to reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. O B. Reject the null hypothesis. There is not sufficient evidence to warrant rejection…
Given the data below, what is the calculated test statistic? Placebo Medication 1 Medication 2 3 4 9 1 3 7 3 5 8 2 5 11 4 4 9 3 SS1 = 5.33 SS2 = 2.8 SS3 = 8.8 T1 = 16 T2 = 21 T3 = 44 n1 = 6 n2 = 5 n3 = 5 ∑X2 = 53 Do you reject the null? Yes No Was there a treatment effect for type of medication on number of anti-anxiety symptoms? Yes No
Realiza a Post-Hoc and interpret the results. Were they significant?
Which of the following is NOT a misuse of statistics?Choose the correct answer below.A.Utilizing valid statistical methods and correct sampling techniquesB.Concluding that a variable causes another variable because they have some correlationC.Misleading graphsD.Making conclusions about a population based on a voluntary response sample
Researchers were interested in assessing whether stress levels are different at the beginning of the semester compared to finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week. Participant Stress 1 Stress 2 1 22 22 2 32 34 3 24 25 4 28 30 5 26 29 What test should be used to test for differences in stress at these two time-points? Select one: a. paired samples t-test b. independent samples t-test c. Pearson correlation d. single sample t-test
See picture please.
What are the values for SS and variance for the following sample of n = 3 scores? Sample: 8, 5, 2
A research poll was conducted to investigate opinions about global warming. The respondent who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming. The results for two age brackets are given in the table below. Human Activity Natural Patterns Don't know Under 30 108 41 7 65 and over 121 71 43 a. At the 1% significance level, test the claim that age bracket is independent of the choice for global warming. State the null and alternate hypothesis, find the test statistic and p-value, and state the decision. b. Do respondents from both age brackets appearto agree, or is there a substantial difference? What distribution is used to do the hypothesis testing? What is different about this C. distribution?
Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
Please dont do handwritten and please explain every concept, i will definitely like or else skip please if you cant follow this..

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