Find the critical region using z-table: a) a = 0.02, left tailed test b) a = 0.005, right tailed test c) a = 0.01, two-tailed test
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Find the critical region using z-table:
a) a = 0.02, left tailed test
b) a = 0.005, right tailed test
c) a = 0.01, two-tailed test
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- A hypothesis test was being done and the hypothesis set up was Ho: p=.35 vs Ha: p<.35 The Z test statistic came out toz=−2.05z=-2.05 ALSOillustrate the region your are finding on a normal curve on your paper.The following table was generated from the sample data of 10 newborn babies regarding the weight of the mother at birth, the weight of the father at birth, and the weight of the baby at birth. The dependent variable is the weight of the baby, the first independent variable (x)) is the mother's weight, and the second independent variable (x2) is the father's weight. Coefficients Standard Error t-Stat p-value Intercept 9.739264 1.337045 7.284173 0.000165 Mother's Weight -0.929448 0.137340 - 6.767476 0.000261 Father's Weight 0.717791 0.159475 4.500951 0.002795 Copy Data Step 1 of 2: Write the multiple regression equation for the computer output given. Round your answers to three decimal places. Answer E Tables E Keypad How to enter your answer (opens in new window) Keyboard Shortcuts X + X2The following results were obtained by regressing mean hourly wage in dollars (Y) on years of schooling (X). Dependent Variable: MEAN_WAGE Method: Least Squares Date: 02/15/15 Time: 11:11 Sample: 1 13 Included observations: 13 Variable Coefficient Std. Error t-Statistic Prob. C -0.014453 0.874624 -0.016525 0.9871 YEARS_SCHOOLING 0.724097 0.069581 10.40648 0.0000 R-squared 0.907791 Mean dependent var 8.674708 Adjusted R-squared 0.899409 S.D. dependent var 2.959706 S.E. of regression 0.938704 Akaike info criterion 2.852004 Sum squared resid 9.692810 Schwarz criterion 2.938920 Log likelihood -16.53803 Hannan-Quinn criter. 2.834139…
- A population of size 100 is divided into four stratà whose sizes are N 1 40, N, = 10, N, = 20 and N, 30 and 4 %3D variances (S?) are 2, 3, 4, 5 respectively. How will you draw samples of size 20 according to the two allocations (proportional and optimum)? ution :You are performing a two-tailed t-test with a sample size of 31 If a = 0.05, find the positive critical value, to two decimal places.A two-tailed test at a 0.1031 level of significance has z values of a. -1.63 and 1.63 O b. -0.82 and 0.82 Oc.-0.82 and 0.82 Od. -1.26 and 1.26 Show All Feedback
- True or falseConduct a realted-sample t-test using the following data set. Each row represents a pairof scores A B 18 4 35 40 31 14 30 18 40 30 25 27 11 17 30 18 28 12 20 20 determine critical values (for an alpha of .05) that you should use to evaluate this t-score and compute r^2 for this test.Structural engineers use wireless sensor networks to monitor the condition of dams and bridges. The article "Statistical Analysis of Vibration Modes of a Suspension Bridge Using Spatially Dense Wireless Sensor Network" (S. Pakzad and G. Fenves, Journal of Structural Engineering, 2009:863-872) desaribes an experiment in which accelerometers were placed on the Golden Gate Bridge for the purpose of estimating vibration modes. For 18 vertical modes, the system was underdamped (damping ratio 1)? Explain why or why not f. e. For what damping ratio would you predict a frequency of 2.0?
- With a = .01, what are the boundaries for two-tailed critical region with a sample of n = 20 subjects? Ot = +2.528 O t = +2.539 O t = +2.845 O t = +2.861Give a brief analysis of the following cross 2?The average American gets a haircut every 35 days. Is the average smaller for college students? The data below shows the results of a survey of 13 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 39, 37, 36, 37, 36, 37, 38, 40, 33, 40, 27, 25, 41 What can be concluded at the the αα = 0.01 level of significance level of significance? For this study, we should use The null and alternative hypotheses would be: H0:H0: H1:H1: The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 3 decimal places.) The p-value is αα Based on this, we should the null hypothesis.
