An experiment is conducted to see the effect of food availability on the growth rate of...
An experiment is conducted to see the effect of food availability on the growth rate of caterpillars
What is INDEPENDENT variable and DEPENDENT variable ?
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An experiment is conducted to see the effect of food
availability on the growth rate of...
An experiment was conducted and the results involving the effect of a particular experimental variable was...
An experiment was conducted and the results involving the effect of a particular experimental variable was widely reported. Later a critic commented that, in fact, nothing could usefully be learned from the study because the observed effect was confounded. What did the critic mean by this? A) The experimenter really wasn't clear about what was desired so the experiment was not well defined. B) The results were so badly described that the critic could not figure out exactly what was...
Dr. Freedom conducted an experiment to determine whether varying the sound level would effect participant’s...
Dr. Freedom conducted an experiment to determine whether varying the sound level would effect participant’s evaluation of a video. Participants were randomly assigned to watch the same video with the sound level set at high, medium, or low. In this example, the independent variable is Select one: a. the evaluation of the video. b. the sound level of the video. c. the video. d. high, medium, and low.
You have conducted an experiment and found that after treatment the mean of your sample was...
You have conducted an experiment and found that after treatment the mean of your sample was 57. The population parameters for the dependent variable are µ= 52, σ= 15. Your null hypothesis was rejected and you will use Cohen’s d to calculate the effect size. In one sentence, report the magnitude and evaluation of the effect size
This is for a plant growth experiment... what are the independent and dependent variables? amount of...
This is for a plant growth experiment... what are the independent and dependent variables? amount of water, water ph, amount of sunlight, type of soil, ph of soil, temperature, and humidity
In this experiment we are testing the effect of different chemical concentrations on microbial growth. Let’s...
In this experiment we are testing the effect of different chemical concentrations on microbial growth. Let’s say instead we used a 1.0% solution of Bleach against a low, medium, and high amount of microbes. How would you expect the growth numbers to look in this experiment? In restaurants, most food contact surfaces are smooth and lack cavities/pores in their surface. What is the advantage of that for microbial control? If soaps are not powerful at killing microbes, why are they used...
What is a food chain? What is a food web? What are trophic levels? (see class...
What is a food chain? What is a food web? What are trophic levels? (see class notes and Campbell pp. 1221-1223) What is the role of primary producers in food chains? Why is the biomass of consumers in a community determined by the net primary production (NPP) of the autotrophs in a community. What abiotic environmental factors affect the net primary production in a community? Gives examples of some communities with high NPP and some with low NPP. Open Ocean...
Growth of Douglas fir seedlings. An experiment was conducted to compare the growth of Douglas fir...
Growth of Douglas fir seedlings. An experiment was conducted to compare the growth of Douglas fir seedlings under three different levels of vegetation control (0%, 50%, and 100%). Sixteen seedlings were randomized to each level of control. The resulting sample means for stem volume were 58, 73, and 105 cubic centimeters (cm3), respectively, with sp = 17 cm3. The researcher hypothesized that the average growth at 50% control would be less than the average of the 0% and 100% levels....
A chi-square test was conducted to see if a person’s drink preferences are independent of their...
A chi-square test was conducted to see if a person’s drink preferences are independent of their age group using data below. Coffee Softdrink Other 21-34 26 95 18 35-55 41 40 20 above 55 24 13 32 4i) What is d.f. to conduct test of independence? 4i) What is the critical value? 4.iii) Given chi-square test statistic is 59.405, you can conclude: (a) A person’s drink preference is independent of their age (b) A person’s drink preference is dependent on...
Dr. Philip Lieberman, a neuroscientist at Brown University, conducted a field experiment to gauge the effect...
Dr. Philip Lieberman, a neuroscientist at Brown University, conducted a field experiment to gauge the effect of high altitude on a person's ability to think critically. The subjects of the experiment were five males who took part in an American expedition climbing Mount Everest. At the base camp, Lieberman read sentences to the climbers while they looked at simple pictures in a book. The length of time (in seconds) it took for each climber to match the picture with a...
An experiment is conducted to measure bacterial growth. The bacteria are continually monitored, but the initial...
An experiment is conducted to measure bacterial growth. The
bacteria are continually monitored, but the initial data is lost.
It is known that at t=1.4d the bacteria concentration is 0.9 mg
VSS/L, and at t = 1.9 d the bacteria concentration is 2.1 mg
VSS/L.
i) Calculate the doubling time
ii) assuming exponential growth applies, estimate the
exponential growth constant using the exponential growth
equation
iii) using the exponential growth model estimate the initial
bacteria concentration at t=0 d,
iv)...
Dr. Philip Lieberman, a neuroscientist at Brown University, conducted a field experiment to gauge the effect of high altitude on a person's ability to think critically. The subjects of the experiment were five males who took part in an American expedition climbing Mount Everest. At the base camp, Lieberman read sentences to the climbers while they looked at simple pictures in a book. The length of time (in seconds) it took for each climber to match the picture with a...
An experiment is conducted to measure bacterial growth. The
bacteria are continually monitored, but the initial data is lost.
It is known that at t=1.4d the bacteria concentration is 0.9 mg
VSS/L, and at t = 1.9 d the bacteria concentration is 2.1 mg
VSS/L.
i) Calculate the doubling time
ii) assuming exponential growth applies, estimate the
exponential growth constant using the exponential growth
equation
iii) using the exponential growth model estimate the initial
bacteria concentration at t=0 d,
iv)...
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