The alternative hypothesis H1 is that the mean annual income μ is less than $50,000. H1:μ < $50,000 Significance level chosen is 5% or α = 0.05 Here, the population standard deviation is unknown. Hence, we use a t statistic Therefore the test statistic used is t = X-μS/n follows a t distribution with n-1 degrees of freedom From the t table corresponding to 0.05 probability, the critical value tα =1.6766. Hence the critical region is t < -1.6766. Alternatively, we reject the null hypothesis, if the p value is less than the significance level Substituting the value we get t = 43.74-5014.6396/50 = -3.02 The p value corresponding to t = -3.02 and 49 d.f.
Name: Suma Pole Class: HCT-362V Hypothesis Testing 06/26/2015 EXERCISE 20 Questions to be graded 1. Which patient scored the highest on the preoperative CVLT Acquisition? What was his or her T score? Patient 3 scored highest on the preoperative CVLT Acquisition with a T score of 62. 2.
Construct Development: Exercise and Depressive Behavior The intricate values of calculation offer essential understanding of statistics. Developing means and standard deviations within the analysis of experiential research will help mental health professionals better understand the significance and efficiency of the intervention or procedure they may use on a patient. Studies conducted by Balkin, Tetjen-Smith, Caldwell, and Shen (2007) discovered that mental health professionals can recommend that a patient with depressive symptoms participate in exercise programs established on measurements attained by employing the Beck Depression Inventory-II on individuals who partook in the study. Demonstrating Gain Balkin, Tietjen-Smith, Caldwell & Shen (2007) provide a straightforward statistics Table that shows how the aerobic exercise group presented the most prevalent gain of 29 percent reduction in their symptoms of depression. The anaerobic group presented a 24 percent reduction whereas the control group presented a 20 percent reduction in their symptoms of depression.
Tanglewood case Four The traditional selection methods of Tanglewood includes such as education, work experience, and interview score. For education, it had 0.03 correlation and less than 0.01 p-value at citizenship, so we can say education had a statistically significant low correlation with citizenship. It also had a significant low correlation with performance, promotion potential and didn’t have statistically significant because the P- values was 0.03 above the standard 0.01. For work experience, because it had correlation was 0.17 around 0.1 at citizenship, so it was a moderate correlation with a significant. Work experience also had statistically significant moderate correlation with absence, performance and promotion potential.
For what values of t will the null hypothesis not be rejected? a) To the left of -1.645 or to the right of 1.645 b) To the left of -1.345 or to the right of 1.345 c) Between -1.761 and 1.761 d) To the left of -1.282 or to the right of 1.282 2. Which of the following is a characteristic of the F distribution? a) Normally distributed b) Negatively skewed c) Equal to the t-distribution d) Positively skewed Find the final exam answers here QNT 561 Final Exam (Recent Upload) 3. For a chi-square test involving a contingency table, suppose the null hypothesis is rejected.
The first criterion that must be met is a 3-year average estimate of the gross national income with a threshold of $992. The country must reach a threshold of $1,190 for removal from the list. (United Nations, 2013). The second criterion that must be met is based on the percentage of the population that is malnourished, physical health of the people in the country, specifically the rate of child mortality, extremely low levels of school enrollment and a low rate of adult literacy. (United Nations, 2013).
The standard Error forms part of the construction of the confidence interval, as the range of a confidence interval is defined by the number of standard errors away from the mean. o E.g. the chart below shows a 95% confidence interval consisting of an upper range of 2 standard errors above the mean, to a lower range of 2 standard errors below the mean. II. Interpretation of Confidence Interval (1 Question) • Confidence Intervals (CI) measures how reliable an estimate is.
The three endpoint values chosen were 15.84 mL, 15.91 mL, and 16.17 mL, leading to an average endpoint value 15.97 mL with a standard deviation of .17. The milimoles of Fe(III) titrated was .3289, corresponding to .01837g of Fe(III) in a total mass sample of .18417g. The salt sample was determined to be 9.976% Fe(III). Part Two: Since a well-trained technician is expected to perform a titration with a percent relative standard deviation below 1.0%, the performance of this titration would be deemed almost passable, but ultimately sub-par. The % RSD was 1.1% based on the three closest endpoint values.