HW11.3,11.4 Score: {\"27 OE'IB answered 0 Question 'I v A classmate asks you for help on a problem. They are doing a Xg-test and get an STS of x2 = 4. How do you know this cannot be correct without even looking at their work? '11:? The smallest possible value of the XZ-distribution is U '11:? X2 values are always between 1 and 1 '31:} xg-tests are never left tailed, but here X2 e: 0 Q X2 values must be fractions . Question 2 v Recall that for a Test for Independence, the STS is: {0 - 312 2 _ X _ 2 E Complete the following statement: X2 Tests for Independence '33:? are ALWAYS right tailed, because you are always subtracting a smaller E value from a larger 0 value '33:? are SOMETIMES left tailed, depending on the claim '53:? are ALWAYS two tailed, because you are just testing for a difference between 0 and E '3' are ALWAYS right tailed, because when computing the STSJ you square the difference between 0 and E. The bigger the difference, the bigger the STS . Question 3 v The table below gives information about a random sample of trees, and whether or not they have been affected by a drought. AffectedNType Pine Fir Cedar Total Yes 39 46 30 115 No 122 146 121 389 Total 161 192 151 504 If you wanted to do a Test for Independence on the data, find the E value you use for the following categories. Round to three decimals. a. Affected by drought and Pine tree: b. Not affected by drought and Fir tree: Question 4