please answer these two q thank you Select the things that INCREASE power. Check all that...
QUESTION 29 Select the things that INCREASE power. Check all that apply. Decrease Alpha Increase Alpha Increase N Decrease N Increase Variability in data. Increase Effect Size Decrease Effect Size U Decrease variability in data.
Select which of these increase power. Increase Alpha Decrease variability in data. Decrease N Increase N Decrease Alpha Increase Variability in data. Increase Effect Size Decrease Effect Size
There are choices for each blank 1. An increase in a (such as using a =0.1 instead of a= 0.05 / A decrease in a (such as using a = 0.01 instead of a 0.05) 2. An increase / A decrese 3. numerator / denominator 4. increase / decrease 5. more / less 6. standard deviation / (standard deviation/root n) / X bar / n 7. A decrease / An increase 8. decrease / increase 9. increase / decrease 9....
Factors Affecting Power in the t Test After completing this week's assigned readings, discuss one of the following questions: What things can a researcher do to try to increase the magnitude of the d effect size? Suppose that you can increase the d effect size while holding group sizes n1 and n2 constant. How will an increase in d influence the magnitude of t ? Several factors influence statistical power for a one-sample t test. How does statistical power change...
please answer correctly and answer all questions.. this is revision question... 7. Which of the following is BEST graphical method for describing categorical data? A. Bar chart B. Histogram C.Box-plot D. Pareto chart 8. Which of the following is NOT property of the variance? A. It measures the amount of spread or variability of observation from mean B. Standard deviation is square root of variance C. Normally used for describing measure of dispersion during reporting research data D. It is...
please be sure to answer all questions! thank you! Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of O and a standard deviation of 1. Draw a graph and find the probability of a bone density test score greater than 0.42 Sketch the region. Choose the correct graph below. OA OB OD. -0 420 42 Click to select your answer and then click Check Answer. Find the...
Please assist with 6.52 Whats Wrong questions!!! Please explain why, if possible. Thank you!!! SECTION 6.2 SUMMARY e A test of significance i A test of significance is intended to assess the evidence provide against a null hypothesis Ho in favor of an alternative hypothesis Ha . The hypotheses are stated in terms of population is a statement that no effect or no difference is present, and Ha says there is an effect or difference in a specific direction (one-sided...
Please answer all D Question 27 1 pts A politician claims that for the adult population of one town, the mean annual salary is u-$30,000 Sample data is collected: n-47, - $22,298, and s-$14,200. Use a significance level of a -0.10 to state the correct rejection region for a test of the claim. Time Attem 1 Ho eus 24/7 Reject Hoifz > 1.96 or z < -1.96. 5 Reject Hoitz < -2.576. Reject Ho if z > 1.96 Reject Ho...
To evaluate the effect of a treatment, a sample of n-8 is obtained from a population with a mean of ?-50, and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be M 55. a) If the sample variance is s-32, use a two-tailed test with ?-0.05 to determine whether the treatment effect is significant and compute Cohen's d b) If the sample variance is s- 72, repeat the test and...
please show all work and explain steps. thank you! The following table shows the results of four samples from four different normal populations. Assume that it is suitable for the ANOVA Sample Sample Size Sample Mean Sample Variance A 6 54 95 B 6 64 30 72 75 D 62 55 6 The sample grand mean is 63. We want to test whether there are differences in the four population means at the 1% level of significance. What is the...