13. A researcher designed an experiment to explore the growth of a plant species with C4 photosynthesis that is salt tolerant. Four levels of salt concentration were of interest to the researcher: 0, 50, 100 and 200 mM NaCl. The experiment consisted of 16 tubes identically planted to the plant species and then randomly assigned to the four salt treatments (4 replicate tubes per treatment). The tubes were placed in individual hydroponic growth systems at the specified concentration of NaCl in the water and the plants were allowed to grow for 8 weeks. At the end of the growth period, the plants were harvested and the dry weight of the roots was measured. Dependent Variable: Sqrtweight Sum of Source Model F Value 9.84 DF Squares Mean Square Pr > F 100.5113058 33.5037686 0.0015 Error Corrected Total 12 40.8558766 3.4046564 15. 141.3671824

Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test are​discriminatory? Use a 0.01 significance level.                           Passed    Failed   White candidates    17      14 Minority candidates 9        29   If: H0​: White and minority candidates have the same chance of passing the test. H1​: White and minority candidates do not have the same chance of passing the test.   answer the following:  **1.  Determine the test statistic.  x2 = ____ **2.  Determine the P-value of the test statistic. p= ____

The mean price of mid-sized cars in a region is $57,600. A test is conducted to see if the claim is true. Identify the null hypothesis. ? v? v Identify the alternative hypothesis. ? v:?v| ? v Identify the type I error. O You decide that the mean price of mid-sized cars is not $57,600, when the mean price of mid- sized cars actually is $57,600. O You decide that the mean price of mid-sized cars is $57,600, when the mean price of mid- sized cars actually is not $57,600. O You decide that the mean price of mid-sized cars is not $57,600, when the mean price of mid- sized cars actually is nor $57,600. O You decide that the mean price of mid-sized cars is $57,600, when the mean price of mid- sized cars actually is $57,600. Identify the type II error. O You decide that the mean price of mid-sized cars is not $57,600, when the mean price of mid- sized cars actually is $57,600. O You decide that the mean price of mid-sized cars is $57,600, when the mean price of mid- sized cars actually is not…

Kelly performs a hypothesis test and calculates a p-value of .489 for her sample data. What decision can be made about the null hypothesis? O fail to reject the null O reject the null