What are the differences between the two types of random variables in statistics? B i U Font Family AA A = (9) CO ± √ GED ■
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- 5/10Which of the following is the name for the statistical hypothesis that describes an outcome of some change? Type I error Null hypothesis Alternative hypothesis Type II error% HW 11: Chapter 06 - OM 257-74 i webassign.net/web/Student/Assignment-Responses/last?dep=26104521 Use the following figure as a quide. Areas Under the Curve for any Normal Distribution 99.7% 95.4% + 68.3% u + lo u + 20 H-30 H- lo ++ 30 u-20 Sketch a normal curve for a random variable x that has a mean of u = 100 and a standard deviation of a = 10. Label the horizontal axis with values of 70, 80, 90, 100, 110, 120, and 130. 70 80 90 100 110 120 130 70 90 110 130 120 100 80 80 100 120 130 110 90 70 130 120 110 100 90 80 70 -P Type here to search
- Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data. Test the null hypothesis that the population frequencies for each category are equal. α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe = What is the correct result based on the data?Answer part 1 and give an explanation on how you got itHomework: Chapter 9 Homework Save Score: 0 of 1 pt 17 of 28 (12 complete) v HW Score: 24.21%, 6.78 of 28 pts X Instructor-created question E Question Help Course Note Packet Chapter 9 Page 1-6 and 10 In a one-tail hypothesis test where you reject Hn only in the lower tail, what is the p-value if ZSTAT = - 2.59? Click here to view page 1 of the Normal table. Click here to view page 2 of the Normal table. The p-value is (Round to four decimal places as needed.)
- The ________ statistic tests whether the means of more than two groups are equal A.) Chi-Square B.) ANOVA C.) t-test D.) CorrelationIs it reasonable to treat the following as a sample from an approximately normal population? Explain. Part: 0 / 4 Part 1 of 4 (a) The following dotplot illustrates a sample. J The dotplot reveals (Choose one) approximately normal population. 9 Therefore, we (Choose one) ▼ treat this as a sample from anActivity 2: Determine the Variance and Standard Deviation of each random variable. 1) 1 3 4 1 1 1 P(x) 2. 4 9. 8. P(x) 0.6 0.1 0.2 0.1 1/5 5 2)
- Textbook: Statistics for the Behavioral SciencesGregory J. Privitera Please show your work-Concept and Application Problems (Pg.133) If Sample 1 has a variance of 4 and Sample 2 has variance of 32, can we tell which sample had a larger range? If so, which sample had a greater range?Nationally, about 11% of the total U.S. wheat crop is destroyed each year by hail.† An insurance company is studying wheat hail damage claims in a county in Colorado. A random sample of 16 claims in the county reported the percentage of their wheat lost to hail. 16 6 8 9 10 18 14 13 9 10 25 18 13 8 14 3 The sample mean is x = 12.1%. Let x be a random variable that represents the percentage of wheat crop in that county lost to hail. Assume that x has a normal distribution and σ = 5.0%. Do these data indicate that the percentage of wheat crop lost to hail in that county is different (either way) from the national mean of 11%? Use ? = 0.01. (a) What is the level of significance? Compute the z value of the sample test statistic. (Round your answer to two decimal places.)(c) Find (or estimate) the P-value. (Round your answer to four decimal places.)Part 2 Let x be a random variable that represents the batting average of a professional baseball player. Let y be a random variable that represents the percentage of strikeouts of a professional baseball player. A random sample of n = 6 professional baseball players gave the following information. x 0.338 0.306 0.340 0.248 0.367 0.269 y 3.5 7.7 4.0 8.6 3.1 11.1 Σx = 1.868, Σy = 38, Σx2 = 0.592034, Σy2 = 294.32, Σxy = 11.1556, and r ≈ -0.901. Se ≈ 1.5890, a ≈ 26.420, and b ≈ -64.517. (a) Find the predicted percentage of strikeouts for a player with an x = 0.328 batting average. (Use 2 decimal places.) %(b) Find a 90% confidence interval for y when x = 0.328. (Use 2 decimal places.) lower limit % upper limit %