You intend to conduct a test of independence for a contingency table with 4 categories in the column variable and 4 categories in the row variable. You collect data from 438 subjects. What are the degrees of freedom for the χ2χ2 distribution for this test? d.f. =

Data was collected for 161 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below. Number  of Guests      Frequency    220 – 239 5 240 – 259 35 260 – 279 80 280 – 299 27 300 – 319 14 What is the class width for this GFDT?Class width =

Find the range, variance and standard deviation of the ff 10, 17, 15, 20, 13, 11, 19, 12, 14, 16 Excel form need

The length of fish were measured at 3 different lakes.  Lake 1:  3.5, 4.2, 6.1, 5.2 Lake 2: 3.1, 3.2, 4.3, 2.1 Lake 3: 5.6, 7.1, 4.4, 4.1, 6.2 Is there evidence to suggest that the average length is not the same at all 3 locations? Group of answer choices There is not evidence to suggest the average length of fish is different at one of the lakes. There is evidence to suggest that the average length is different at one of the lakes.   Enter the test statistic (to 4 decimal places)