20. Test the claim about the population proportion p *0.325 given n = 42 and p^ = 0.247. Use a = 0.05.

see 8.png

Each box weighs the same. Which statement is TRUE when comparing the interquartile range (IQR) of the data? 38 32 32 33 29 28 27 26 25 23 Range = Max - Min IQR = Q3-Q1 Brand C Brand D

Social media is becoming more and more popular around the world. Suppose a website provides estimates of the number of social media users in various countries. Assume that the results for surveys in the United Kingdom, China, Russia, and the United States are as follows. Use Social Media Yes No United Kingdom 480 320 Country China Russia 235 265 343 Need Help? 357 O Ho: All population proportions are not equal. H₂: P₁ = P₂ = P3 = P4 Read It OHO: Not all population proportions are equal. Ha: P₁ = P₂ = P3 = P4 (a) Conduct a hypothesis test to determine whether the proportion of adults using social media is equal for all four countries. State the null and alternative hypotheses. O Ho: P₁ = P₂ = P3 = P4 H₂: Not all population proportions are equal. United States 620 380 Ho: P₁ = P₂ = P3 = P4 H: All population proportions are not equal. Find the value of the test statistic. (Round your answer to two decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value =…

Two varieties of corn are grown in 4 different locations. Each location provides a value in pounds for each variety.The table below lists the results. Find the standard error for the difference in the production of the two corn varieties to two decimal places.   Variety 1 Variety 2 difference location 1 32.1 34.5 -2.4 location 2 30.6 32.6 -2.0 location 3 33.7 34.6 -0.9 location 4 29.7 31.6 -1.3 mean value 31.53 33.18 -1.65 standard deviation 1.76 1.72 0.68     1.23     0.75     0.34     0.98

company's price/earnings (P/E) ratio is the company's current stock price divided by the latest 12 months' earnings per share. Suppose the following table shows the P/E ratios for a sample of 10 Japanese companies and 12 U.S. companies. Japan P/E Ratio 155 26 19 123 36 215 61 667 35 69   United States P/E Ratio 14 21 21 45 28 11 26 11 26 39 13 11 Is the difference between the P/E ratios for the two countries significant? Use the MWW test and ? = 0.01 to support your conclusion.     Find the value of the test statistic. W =  Find the p-value. (Round your answer to four decimal places.) p-value =