For which of the following pairs of variables would it be appropriate to use a chi-square to test if a significant association exists between the two variables (assuming we have met the expected counts requirement).

Why can’t the following mode predict 100% of the variability in the price of a used Corolla?

To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical Company obtained the following data on the time (in minutes) needed to mix the material.    Manufacturer   1 2 3     25 34 15     31 32 14     29 37 18     27 33 17 a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use a = 0.05.  Sum of squares, treatment =  Sum of squares, error =  Mean squares, treatment =  mean squares, error =  Calculate the value of the test statistic (to 2 decimals). The P-value is:  Less than 0.01, between 0.01 and 0.025, between 0.025 and 0.05, between 0.05 and 0.10, greater than 0.10 What is your conclusion? b. At the a = 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3. What conclusion can you draw after carrying out this test?

J In-shop othesis test for the difference between two population proportions 02562 2600368.qx3zqy7 Jump to level 1 The manager of a coffee shop is trying to determine if drive-through customers buy fewer items than customers who come into the shop. The manager randomly samples both populations and calculates the proportion of customers in each that buy three or more items. The results of the data collected are shown below. What are the population parameters? Y Pick Drive-through Successes 27 Successes What is the level of significance? Ex: 0.12 Observations 76 Observations 41 119 0.345 p-hat_1 0.355 p-hat_2 What is the null hypothesis Ho? Pick Confidence Level 0.1429 What is the alternative hypothesis Ha? Pick p-value Should Ho be rejected or does Ho fail to be rejected? Pick What conclusion can be drawn from the data? Pick evidence exists to support the claim that drive-through customers buy fewer items than in-shop customers. 2 p W

The best depiction of a population characteristic is a(an): Dependent variable Statistic Independent variable Parameter

The independent variable in either a before/after t or a within subjects F is always of what data scale