Consider the following competing hypotheses and accompanying sample data drawn independently from normally distributed populations. (You may find it useful to reference the appropriate table: [z table](#) or [t table](#))\( H_0: \mu_1 - \mu_2 = 0 \)\( H_A: \mu_1 - \mu_2 \neq 0 \)\[\begin{align*}\bar{x}_1 &= 55 \\\sigma_1 &= 11.00 \\n_1 &= 23 \\\end{align*}\]\[\begin{align*}\bar{x}_2 &= 59 \\\sigma_2 &= 1.52 \\n_2 &= 23 \\\end{align*}\]a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round final answer to 2 decimal places.)| Test statistic | \(\_\_\_\_\_\_\_\_\_\) |

Answered: Image /qna-images/answer/23290b45-cf30-4a90-915f-3ccb45f36573.jpg

Answered: Consider the following competing…

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 accompanying summary data on skeletal-muscle CS activity (nmol/min/mg) appeared in an article. Old Old Young Sedentary Active Sample size 10 8. 10 Sample mean 46.28 47.41 58.34 Sample sd 7.16 5.59 8.43 Carry out a test at level a = 0.05 to decide whether true average activity differs for the three groups. Suppose that all required ANOVA assumptions are satisfied. If appropriate, investigate differences amongst the means with a multiple comparisons method. (Use i = 1, 2, and 3 respectively.) State the appropriate hypotheses. Ho: H1 = H2 = H3 H: all three H's are unequal Ho: H1 = H2 = H3 Ha: : at least two u's are unequal O Ho: H1 # H2 + H3 all three u;'s are equal Ha Ho: H1 + H2# H3 H: at least two u's are equal Calculate the test statistic. (Round your answer to two decimal places.) f =
Present the results using APA format. What does the conclusions mean in general terms?
Big babies: The National Health Statistics Reports described a study in which a sample of 96 one-year-old baby boys were weighed. Their mean weight was 25.6 pounds with standard deviation 5.3 pounds. A pediatrician claims that the mean weight of one-year-old boys is greater than 25 pounds. Do the data provide convincing evidence that the pediatrician's claim is true? Use the =α0.05 level of significance and the P -value method and Excel. Part: 0 / 5 0 of 5 Parts Complete Part 1 of 5 (a)State the appropriate null and alternate hypotheses. H0 : =μ25 H1 : >μ25 This hypothesis test is a ▼two-tailed test. Part: 1 / 5 1 of 5 Parts Complete Part 2 of 5 (b)Compute the value of the test statistic. Round the answer to at least three decimal places.…
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"
For a fixed alpha level of significance used for a hypothesis test, the critical value for a chi-square statistic decreases as the size of the sample decreases. a. True b. False
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You wish to test the following daim (H.) at a significance level of a = 0.005. H.:µ = 83.8 Ha:µ < 83.8 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 16 with mean M = 71.4 and a standard deviation of SD = 17.1. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... O less than (or equal to) a greater than a This test statistic leads to a decision to... O reject the null accept the null fail to reject the null As such, the final condusion is that... O There is sufficient evidence to warrant rejection of the daim that the population mean is less than 83.8. O There is not sufficient evidence to warrant rejection of the daim that the population mean is less than 83.8. O The sample data support the daim that the population mean is less than…
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
For the specified margin of error and confidence level, obtain a sample size that will ensure a margin of error of at most the one specified. margin of error = 0.03; confidence level = 95% Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. (Round up to the nearest integer.) n3=
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 250 engines and the mean pressure was 5.9 Ibs/square inch. Assume the variance is known to be 0.36. If the valve was designed to produce a mean pressure of 5.8 lbs/square inch, is there sufficient evidence at the 0.02 level that the valve performs above the specifications? State the null and alternative hypotheses for the above scenario. 国 Tables E Keypad Answer Keyboard Shortcuts еурad Ho: X土S2 b ce v VI

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