TABLE 2.2 A Quantitative Frequency Variable Number of plants of the sedge Carex flacca found in 500 quadrats. Observed No. of plants per quadrat Y frequency 181 118 97 3. 54 4 32 8. Total 1 500 ata fom Archibald (1950).

Weights​ (kg) of poplar trees were obtained from trees planted in a rich and moist region. The trees were given different treatments identified in the accompanying table. Use a 0.05 significance level to test the claim that the four treatment categories yield poplar trees with the same mean weight. Is there a treatment that appears to be most​ effective?   LOADING... Click the icon to view the data table of the poplar weights. No Treatment Fertilizer Irrigation Fertilizer and Irrigation   1.24 0.99 0.09 0.93   0.65 0.94 0.63 1.41   0.41 0.55 0.13 1.06   0.15 0.51 0.88 1.49   1.31 1.01 0.84         Determine the null and alternative hypotheses.   H0​: ▼   mu 1 greater than mu 2 greater than mu 3 greater than mu 4μ1>μ2>μ3>μ4 Exactly two of the population means are equal.Exactly two of the population means are equal. Not all of the population means are equal.Not all of the population means…

Find the test statistic and p value

Please answer quickly!

Scores in the first and final rounds for a sample of 20 golfers who competed in tournaments are contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Due to a recent change by Microsoft you will need to open the XLMiner Analysis ToolPak add-in manually from the home ribbon. Screenshot of ToolPak X Open spreadsheet Suppose you would like to determine if the mean score for the first round of an event is significantly different than the mean score for the final round. Does the pressure of playing in the final round cause scores to go up? Or does the increased player concentration cause scores to come down? a. Use a = .10 to test for a statistically significantly difference between the population means for first- and final-round scores. What is the p-value? p-value is What is your conclusion? There is no Final round (to 4 decimals) b. What is the point estimate of the difference between the two population means? (to 2 decimals) For which round…

What are the population parameters? Pick one:          The difference in the sample sizes           The difference in the two sample means           The mean time spent for all test-takers before and after tutoring           The mean time spent for all test-takers before and after tutoring combined   Does sufficient or insufficient evidence exist?

Sample(Prefers) 7. 6 5 3. 2. -1 -0.5 0 0.5 1.5 Sample(IAT-Weight-Score) A. Do the boxplots suggest that the samples come from populations with different means? Briefly explain.

Define what is a factor and a level in an Analysis of Variance (ANOVA). Give me an example of a factor with its levels.