Question 5: The one-sample t-statistic for a test of Ho: µ = 15 versus Ha: u # 15 based on 18 observations is calculated ast = -2.17. What is the p-value for this test? Answer:
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- A one-sample test of H0: μ = 125 against Ha: μ > 125 is carried out based on sample data from a Normal population with standard deviation 15. The SRS of size 15 produced a mean 132.8 and standard deviation 12.6. What is the P-value of the test in this situation?Two samples of 6 and 5 items respectively gave the following data : Mean of 1st sample 40 Standard deviation of 1st sample Mean of the second sample 50 Standard deviation of the 2nd sample 10 Is the difference of means significant ? The value of t for 9 degress of freedom at 5% level is 2.264.27 please. I already had 4.26 answered. Thank you!
- One group of accounting students took a distance learning class, while another group took the same course in a traditional classroom. At α = .10, is there a significant difference in the mean scores listed below? Exam Scores for Accounting Students Statistic Distance Classroom Mean scores x⎯⎯1x¯1 = 9.0 x⎯⎯2x¯2 = 10.2 Sample std. dev. s1 = 2.1 s2 = 2.4 Number of students n1 = 19 n2 = 19 Assume μ1 is the mean score of distance learning and μ2 is the mean score of classroom learning. The appropriate hypotheses is H0: μ1 – μ2 = 0 vs. H1: μ1 – μ2 ≠ 0 (b) Specify the decision rule. (Round your answers to 3 decimal places. A negative value should be indicated by a minus sign.) Reject the null hypothesis if tcalc < _______. Or tcalc > ______________. (c) Find the test statistic tcalc. (Round your answer to 4 decimal places. A negative value should be indicated by a minus sign.) tcalc ______________help!You wish to test the claim that u # 20 at a level of significance of a = 0.05 and are given sample statistics n 35, n = 35, x = 19.1, ands = 2.7. Compute the value of the %3D %3D %3D - %3D standardized test statistic using the formula
- You wish to test the following claim (HaHa) at a significance level of α=0.002α=0.002. Ho:μ1=μ2Ho:μ1=μ2 Ha:μ1>μ2Ha:μ1>μ2 You obtain the following two samples of data. 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? For this calculation, use the degrees of freedom reported from the technology you are using. (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) αα greater than αα This test statistic leads to a decision to... reject the null accept the null fail to reject the nullWhat is the test statistic?(3 decimal places) What is the critical value(s)?(3 decimal places) Reject or don’t reject?The manufacturer claims that your new car gets 24 mpg on the highway. You suspect that the mpg is less for your car. The 44 trips on the highway that you took averaged 22.3 mpg and the standard deviation for these 44 trips was 4.2 mpg. What can be concluded at the αα = 0.05 level of significance? For this study, we should use (t-test for population mean, z-test for population proportion) The null and alternative hypotheses would be: H0: (symbol) (symbol) ____ H1: (symbol) (symbol) ____ The test statistic (?,t,z) = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is (?, less than or equal to, more than) αα Based on this, we should (accept, reject, fail to reject) the null hypothesis. Thus, the final conclusion is that ... The data suggest that the sample mean is not significantly less than 24 at αα = 0.05, so there is statistically insignificant evidence to conclude…
- My answer is as follows: T critical = 2.70 T value= 7.775 P< a (0.01) Therefore we reject the null. Is this correct?A test of Ho: H=0 versus H₁: >0 is performed using a significance level of a=0.05. The P-value is 0.07. Part: 0/3 Part 1 of 3 (a) Is Ho rejected? Since P Part: 1/3 Part 2 of 3 Part: 2/3 ▾a, we do not reject Ho at the a= 0.05 level. (b) If the true value of μ is 0, is the result a Type I error, a Type II error, or a correct decision? The result is a correct decision Part 3 of 3 X X S (c) If the true value of His 4, is the result a Type I error, a Type II error, or a correct decision? S EspañolMuch is still to be learned about the relationship between sound frequency and loudness. One way to study this relationship is to have listeners perform loudness judgments for tones of different frequencies. For each listener, the output of these judgments is a number, measured in sones, that gives the loudness of the tone relative to the loudness of a reference tone. You have in front of you data from an experimental study in which 54 listeners were asked to perform such loudness judgments for tones of various intensities and frequencies. Of these 54 listeners, 18 had normal hearing, 18 used hearing aids, and 18 had some hearing loss at low frequencies (but didn't use hearing aids). Here is a summary of the data obtained for a 50 dB SPL, 500-Hz tone (the data are the sone values corresponding to this tone). Sample size Sample Sample variance Groups mean Normal hearing 18 2.52 0.3 Hearing aid 18 2.23 0.3 Some hearing loss 18 1.97 0.2 Send data to calculator Send data to Excel
