a. Calculate the test statistic.2=Round to two decimal places if necessaryEnter 0 if normal approximation cannot be usedb. Determine the critical value(s) for the hypothesis test.+ The alternative hypothesis, significance level, and summary statistics are provided.Conduct the stated hypothesis test for two population proportions using the giveninformation.H₁: P₁ P₂ <0P1 = 0.08P2 = 0.13Standard Normal Distribution Tablea = 0.025n₁ = 400722 = 200

The null and alternative hypothesis are H0 : p1 - p2 = 0H1: p1 - p2 < 0 This is left tailed test…

Answered: The alternative hypothesis,…

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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A- Discuss the differences between the (t) test of the mean and the standard normal distribution? B- Find the skewness and discuss your results after draw the histogram for the data listed below and check its shape: 1,2,3,8,8,9,10,11, 15,16,17,18.
Sample Size. How does the sample size affect how close to a normal distribution of either sample means or sample proportion will be?
Suppose you are asked to toss a coin 16 times and calculate the proportion of the tosses that were heads. a. What shape would you expect this histogram to be and why? b. Where you do expect the histogram to be centered? c. How much variability would you expect among these proportions? d. Explain why a Normal model should not be used here.
Answer the last question
Use the magnitudes (Richter scale) of the 120 earthquakes listed in the accompanying data table. Use technology to find the range, variance, and standard deviation. If another value, 8.00, is added to those listed in the data set, do the measures of variation change much? 3.272.452.542.432.752.372.192.421.911.432.851.731.992.322.332.704.742.873.382.722.833.423.952.993.873.473.082.942.703.602.842.373.033.232.593.643.242.662.352.432.813.952.522.922.983.412.272.562.933.162.201.151.934.002.542.832.352.311.522.801.951.602.452.332.081.553.201.491.812.551.662.352.452.082.192.752.002.792.392.671.692.881.841.991.862.561.972.183.671.553.162.461.881.502.793.283.822.752.452.712.541.642.183.032.361.481.922.322.651.411.391.802.242.302.481.732.402.442.482.44
Find the best point estimate for the ratio of the population variances given the following sample statistics. Round your answer to four decimal places. n1=18n1=18, n2=28n2=28, s12=75.455s12=75.455, s22=55.482s22=55.482 Copy Data
Calculate the standard deviation and variance of the sample data shown, to two decimal places 11.9 8.4 10.7 22.4 8.8 21.6 5.2 25.4 Standard deviation: Variance: Submit Question plete &
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"
Use the standard normal distribution table to determine the percent of data between z=1.04 and z=1.32. The percent of data between z=1.04 and z=1.32 is
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answer mmultiple choice
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The alternative hypothesis, significance level, and summary statistics are provided. Conduct the stated hypothesis test for two population proportions using the given information. H₁: P₁ P₂ <0 P1 = 0.08 P2 = 0.13 Standard Normal Distribution Table α = = 0.025 n₁ = 400 722 = 200