Question 1 1 pts When evaluating a study conducted by someone else, what basic principles should you look for in their study? control O None of the other answers are correct O randomization O all of these O replication Question 2 1 pts An experimenter wishes to test whether or not two types of fish food (a standard fish food and a new product) work equally well at producing fish of equal weight after a 2-month feeding program. The experimenter has 2 identical fish tanks (1 & 2) to put fish in and is considering how to assign the 40 tagged fish to the tanks. To properly assign the fish, one step would be to: O to proceed as in as in (b), but put the heavier of the pair into tank 2. Selected O None of the other answers are correct O put all the odd tagged numbered fish in one tank, the even in the other, and give the standard food type to the odd numbered ones O assign the fish at random to the two tanks and give the standard feed to tank 1. O assign the fish at random to the two tanks and give the standard feed to tank 1.e initial length of the fish instead O obtain pairs of fish whose weights are virtually equal at the start of the experiment and randomly assign one to the group tank 1, the other to tank 2 with the feed assigned at random to the tanks.Question 3 1 pts A student wishes to examine the effect of wing width and wing length on the length of flight of a paper airplane. There are 4 different models of airplanes. Which of the following is NOT correct? O Planned experiments (where randomization can take place) is one of the strongest pieces of evidence in try to establish a causal relationship. O It would be better to make four copies of each model of plane to give some feel for the plane-to-plane variations. Flying a single copy four times gives information about the internal variation. O Interaction between two factors means that the effect of a factor at one level depends on the level of the second factor. O the order of flights was randomized to remove the influence of any other variables upon the flight distance of each flight. O None of the other answers are correct O A factor (such as wing width) is an experimental variable under control of the experimenter. Question 4 1 pts Using enough experimental units to reduce chance variation is called O replication O matching O control O None of the other answers are correct O randomizationQuestion 5 1 pts You have 30 subjects available for a comparative experiment. 15 subjects will recieve the treatment. Number the subjects 01 to 30. Using the random digit table below, what are the first five subjects? 07511 88915 41267 10753 84569 79367 32337 03316 O None of the other answers are correct O The table is not long enough to obtain a sample size of 5 under these conditions. O 07, 11, 15, 12, 10 O 07, 18, 15, 26, 16 O 07, 10, 03, 16, 12 O 07, 18, 15, 26, 07 Question 6 1 pts The first basic principle of experimental design is establishing None of the other answers are correct O randomizarion treatment O a control group. O replication.Question 7 1 pts An observed effect so large that it would rarely occur by chance is O commonplace O statistically significant O None of the other answers are correct O randomized O statistically insignificant Question 8 1 pts An experiment to improve eyesight with a new drug involves 100 subjects. 50 subjects are randomly chosen to receive the treatment and the other 50 subjects receive a placebo. There was very little difference between the success rate of the treatment group and the placebo group. The success of the placebo group may be due to O trust in the doctors. O the placebo effect. O patients responding to any treatment, even a "sugar" pill. O expectations of improvement. O None of the other answers are correct O all of theseQuestion 9 1 pts Which of the following is a treatment designed to look like the active treatment but which has no active ingredien is? 0 None of the other answers are correct 0 bias 0 placebo 0 cluster 0 experiment Question 10 1 pts A researcher wishes to compare the effects of 2 fertilizers on the vield of a sovbean crop. She has 20 plots of land available and she decides to use a paired experiment -- using 1D pairs of plots. Thus, she will: C} subjectivelv divide the 2D plots into 10 pairs {making the plots within a block as similar as possible: and then. for each pair. flip a coin to assign the fertilizers to the 2 plots. 0 use a table of random numbers to divide the 20 plots into 10 pairs and then, for each pair. flip a coin to assign the fertilizers to the 2 plots. 0 ip a coin to divide the 20 plots into 10 pairs and then. for each pair. use a table of random numbers to assign the fertilizers to the 2 plots. 0 use a table of random numbers to divide the 20 plots into 10 pairs and then use the ta hle of random numbers a second time to decide upon the fertilizer to be applied to each pair. 0 None of the other answers are correct 0 use a table of random numbers to assign the 2 fertilizers to the 20 plots and then use the table of random numbers a second time to place the plots into \"ID pairs