3. Chi square tests can be used to support or reject other types of hypotheses where random For example, studies done on honeybees may track how often bees visit each type of flower. In these studies, you are trying to disprove that the bees visit the flowers in equal amounts (showed no preference). Scientists observed that 54 bees visited tulips and 66 bees visited lilies. Do the bees in the study below show a statistically significant preference for lilies? (Observed - Expected)? Expected Observed Expected Visited Tulips Visited Lilies Summed X =
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- 5) You want to know if an octopus (octopi are very intelligent!) can tell the difference between circles and rectangles. You provide each octopus with one circular disk and one flattened rectangle. You hide food under the rectangle. After several trials, you then count how many times the octopus picks up the circle and how many times it picks up the rectangle. You get the following results: Circles: 11. Rectangles: 29 Can the octopus tell the difference between circles and rectangles? (Hint: if the octopus can't tell the difference, what's the probability that he/she will pick a circle?1. An aquaponics system is a system in which fish and plants are grown together. Shane Ahrens wanted to know if tumbled glass could be used as a media in an aquaponics system. He grew kale in clay and glass (in mesh cups suspended in the water) and measured kale biomass. What is the null hypothesis? What is the alternative hypothesis? Calculate the sample mean and variance for each treatment and then calculate the t statistic and degrees of freedom. Kale Biomass (mg) Clay Glass 17.5 37.1 13.9 31.1 31.2 28.7 29.9 37.5 22.5 28.1 Mean Variance (n, – 1)s², + (n2 – 1)s²2 × n + n2 -2 + n2 d.f. = If you conduct this analysis in R, the output tells you the p-value = 0.042. What conclusion can you make (i.e., accept or reject the null hypothesis)? Explain how you reached this conclusion. Write a sentence as you would for the results section of a paper.9. A biologist knows from past research that the average length of a leaf of a specie of full-grown plant is 4 inches. After administering a new type of plant food, he found that the length of the leaves increased. He wants to know if this change in length is significant enough by performing a hypothesis test. What test should he use? O A. Two sample t-Test for independent samples1 O B. One sample chi-square test O C. One sample t-Test D. Two sample F-test
- I am testing the prediction that spiders with colors that match a flower (cryptic coloration) will have greater success hunting bees visiting that flower. I set up two treatments for spiders: those matching their flower and those not matching their flower. I measure how long it takes each of them to catch a bee. What kind of statistical test would be best for testing my prediction? Chi-square ●ANOVA Regression1) Design an experiment based on fruit ripening and ethylene: (1 or 2 sentences is fine) Hypothesis: Independent variable: Dependent variable: Control (describe at least 2): Describe the control group: Method: Create a graph/table of your expected results. Label all axes and give the graph/table a name.A. Why do we need to test the null hypothesis instead of just proving an alternative hypothesis? B. You are testing the effect of a particular fertilizer on a plant's growth. Your control plants don't get fertilizer while your test plants do. What would be your hypotheses and the null hypotheses?
- What is your analysis in the What is your analysis on the given picture? How is this concept important?I'm trying to make sense of what I'm supposed to do I have to write two statements on the conclusion on my pendulum prediction. If your predication was supposed or no and what, you conclude about the variable that was tested? explain possible sources of errors of things that could have been affected your experiment? how you used the scientific method and the last question is to suggest two things that could be done to improve your experiment? can you please explain what these questions mean? I have to put them in statements but not sure what they mean. I'll include what my teacher said. Here is my advice to distinguish between the dependent and independent variables. The dependent variable depends on the independent variable. So, set up two statements comparing your two variables, such as kick distance and leg strength. Does leg strength depend on kick distance? Or does kick distance depend on leg strength? One of those statements will make more sense than the other. It…1. A scientist wants to test the effect of different sugars on the growth of yeast (yeast like to feed on sugar). They want to see if coconut sugar is better or worse than plain table sucrose (normal sugar) on the growth of yeast. a. What would a good positive control be? b. What would a good negative control be? c. What is our independent variable? d. What is our dependent variable?
- plants were grown using two differenc fertilizers and the number of flowers that each plant produced was counted. to test for a significant effect of fertilizer on the number of flowers at the 5% level significance, the calculated and the critical values were computed. type both the null and the alternative hypothesis for this test in the box below. use full sentences to describe both H0 and H1. (no mathematical terms in the answer)34 note: i don't have a clear photo of the diagram, please just analyze it and don't reject the question. JUST MAKE AN INTELLIGENT GUESSIn an experiment, the control group is used to: a Change the variable b Provide a baseline for comparison with the test group c add additional non-dependent variables d demonstrate correlation rather than causation e generate hypotheses