he results of a between-subjects study are reported as "t = -2.12, p > .05, two tailed." What statistical decision should be made? A)There independent variable had a significant effect. 
 B)No decision can be made. 
 C)The null hypothesis should be rejected. 
 D)The researcher should fail to reject H0.

A diet doctor claims that the average North American is more than 20 poundsoverweight. To test this claim, a random sample of 20 North Americans was weighed,and the difference between their actual and ideal weights was calculated. The statisticscalculated from the sample were ?̅= 21.2 and ? = 6.7. Do these data allow us to infer atthe 6% significance level that the doctor’s claim is true? Provide your analysis andconclusion.

Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 408 of the 536 randomly selected wildfires looked at in the south were caused by humans while 393 of the 579 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the  = 0.01 level of significance?   For this study, we should use Select an answer t-test for a population mean t-test for the difference between two independent population means t-test for the difference between two dependent population means z-test for a population proportion z-test for the difference between two population proportions  The null and alternative hypotheses would be:          Select an answer μ1 p1  Select an answer > ≠ < =  Select an answer p2 μ2  (please enter a decimal)       Select an answer μ1 p1  Select an answer < > ≠ =  Select an answer μ2 p2  (Please enter a decimal) The test statistic ? t z  =  (please show your…

Suppose IQ scores were obtained for 20 randomly selected sets of twins. The 20 pairs of measurements yield x = 102.36, y = 104.7, r=0.949, P-value = 0.000, and y = 0.27 + 1.02x, where x represents the IQ score of the twin born first. Find the best predicted value of y given that the twin born first has an IQ of 99? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficient r. The best predicted value of y is (Round to two decimal places as needed.)