Q3.1.Which of the following statements about good experiments is TRUE?A good experiment must incorporate all feasible causal factors in one experimental group.A good experiment must have actually an experimental group. A manage group might be beneficial but is no criticalA good experiment should include a perhaps confounding variable in at least one group.A great experiment includes replication by using treatments come multiple experimental units.

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Q3.2.Why is replication crucial to consider when developing an experiment?

Replication permits you to test multiple live independence variables in the exact same experimentReplication boosts confidence that your results apply much more widely, not just to particular cases.Replication is vital to introduce systematic variation right into an experiment.Replication boosts the possibilities that a rare an outcome leads you come an erroneous conclusion.


A farmer who grows blackberries has found his harvest come be reduced than usual. He suspects the some animals are eating the berries prior to he deserve to pick them. The farmer think it might be either bird (landing ~ above the bushes come feast on berries) or rodents (climbing the bushes from below to munch on berries). That decides to very first testthe theory that birds are eating his berries, and also consults with a local experienced on how best to prevent the birds from eat berries. He has actually eight fields with 10 rows the berry bushes in each field. In one of his fields (depicted below, as regarded from above), that covers fifty percent of the rows through nets the will stop birds indigenous landing ~ above the bushes, and he pipeline the other fifty percent uncovered. Over the food of 8 weeks, he counts the berry harvested from each heat of bushes in the test field.


3.3.What room the independent (treatment) and dependent (response) variables in the farmer’s experiment?

The independent variable isnumber of rowsand the dependent change isnumber of berry harvestedThe independent variable ispresence/absence that netsand the dependent change isnumber that rows.The independent variable isnumber of berry harvestedand the dependent change ispresence/absence the nets.The independent variable ispresence/absence that netsand the dependent variable isnumber of berry harvested.

Q3.4.What room the experimental units in his experiment? (Hint: Remember, experimental units are the reality to i m sorry the therapy is applied.)

The birdsThe blackberry bushesThe rows that bushesThe fields

Q3.5.What is the regulate group in his experiment?

The uncovered rowsThe spanned rowsThe other 7 fieldsThere is no regulate group

Q3.6.The farmer’s experiment to be widely thought about to it is in well-designed and also well-implemented. ~ 8 weeks, he uncovered no difference between groups, and also the berry harvest to be still reduced than in previous years. What deserve to he conclude around his hypothesis?

Rodents are eating the berries.Birds are eating the berries.Birds space not eating the berriesThe results carry out not deal with the hypothesis.


A team of researcher is to plan an experiment come testthe theory that sleep deprivation decreases memory retention. Every participants will have actually a exercise session in which lock memorize words. That night they will sleep in a monitored lab because that a specified time that depends on their group. Climate each participant will certainly be tested on how countless words lock remember indigenous the practice session. The researchers are deciding what conditions they have to manipulate because that the speculative group.

Q3.7.The table below shows conditions for the control group and three possible experimental groups. Which speculative group must the researchers usage to to compare to the regulate group in order come test their hypothesis?


Image warrior textControl experimental ExperimentalExperimental team Group 1 team 2Group 3 variety of hours…Show more

Experimental group 1Experimental group 2Experimental team 3None the the experimental groups are suitable for testing their hypothesis.


Advertisements because that a new energy drink case that it helps human being concentrate, and you are making an experiment come testthe theory that the energy drink enhances concentration. A huge group of examine participants space going to concerned your lab and take a concentration test. Currently you must pick independent and dependent variables for your experiment.

Q3.8.What would certainly be an proper independent (treatment) change for your experiment?

How lot caffeine (from all sources) participants have consumed the day of the test

How much of the power drink participants report drink in the critical month

How fine the participants can concentrate during the test

How lot of the power drink participants space instructed to drink right prior to the test


Q3.9.Of the following possible dependent (response) variables, i m sorry is the most appropriate for your experiment?

Participants’ self-reported ability to concentrate on the concentration testParticipants’ score on the concentration testParticipants’ heart rate during the concentration testParticipants’ capability to continue to be awake during the concentration test


Many gardeners believe that specific edible herbs, prefer oregano, sage, and also rosemary, taste better if deprived that water and nutrients. You decide to testthe hypothesis that the frequency of watering impacts the flavor of sage. You grow two sage tree from seed, side-by-side in two different pots. Friend water one every various other day (as a regulate treatment) and the other only when a mainly (as an experimental treatment). Then you invite 50 civilization over for a taste test. Each receives two samples of sage leaves, marked as “A” and “B” so that they carry out not recognize which sample is indigenous which treatment. Your friends price each sample’s smell on a scale of 1-5. You compare the mean scores for each plant.


Image transcription textLess much more Frequently typically WateredWatered


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As with any kind of experiment, her setup has actually limitations. I beg your pardon of the following principles for boosting replication is MOST likely to enhance your capacity to check the hypothesis that watering frequency affect the taste of sagein general?

Increase the variety of leaf samples take away from each plant.Increase the number of sage plants in the experimental group.Increase the variety of sage tree in both control and experimental groups.Do the very same test ~ above rosemary and oregano, in addition to sage.