**Text to be displayed on an Educational Website:**---**According to the text, a researcher studied the effects of concentrations of lead on the life expectancy of Daphnia magna. At each ecosystem, distinguish what type of sampling the researcher used. Summarize the type of sampling.***Student can enter max 3000 characters*---**Description of Visual Elements:**- There is a section for text input with formatting options including: - Bold - Italics - Underline - Bullet points - Numbered lists - Symbol insertion (Ω symbol is shown)- There is a prompt indicating that students can attach files using the paperclip button below this text area.- This is viewed on a Dell laptop screen, with a portion of the black keyboard visible.- At the bottom of the screen, there is a taskbar displaying running applications including Chrome and other common applications.The text box appears to be part of an online form or educational platform where students can submit their responses to a given prompt. The presence of the formatting options suggests that students can enhance their submissions with styling as needed.**Instructions for Students:**- Use the provided tools to format your answer.- Ensure your response is comprehensive and includes detailed summaries of the sampling types used in the study of the effects of lead on Daphnia magna.---

Sampling is a way of selecting cases from a population.

Answered: According to the text, a researcher…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.† These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order. Make an ogive using five classes. (Graph each point and the closed line segments connecting the points to create your graph.)
Use the figure to the right, which shows the percentages of adults from several countries who favor building new nuclear power plants in their country. The survey included random samples of 1051 adults from Country A, 1120 adults from Country B, 1048 adults from Country C, and 1013 adults from Country D. At a = 0.05, can you support the claim that the proportion of adults in Country B who favor building new nuclear power plants in their country is different from the proportion of adults from Country C who favor building new nuclear power plants in their country? Assume the random samples are independent. 100- 80- 60 40 20 I Country A 53% I Country B 47% O Country C 46% O Country D 34% Identify the claim and state Ho and H. The claim is "the proportion of adults in Country B who favor building new nuclear power plants in their country is different than the proportion of adults from Country C who favor building new nuclear power plants in their country." Let p, represent the population…
A study was conducted to determine where zebra are found in a region containing a various habitats including savannahs, grasslands, woodlands and mountainous areas. A map of the study area was partitioned into four habitat types. The figure below shows these four habitat types. The proportion of total acreage in each of the habitat types was determined for the study area. Using an aerial survey, zebra locations were observed and classified into one of the four habitat types. The results are given in the table below. Proportion of Total Acreage Habitat Туре Number of zebra Observed Expected number of zebra 1 0.340 25 2 0.101 22 3 0.104 30 4 0.455 40 Total 1.000 117 The researchers who are conducting the study expect the number of zebra observed in a habitat type to be proportional to the amount of acreage of that type of habitat. Are the data consistent with this expectation? The critical value is 7.815 with a significance level of 0.05.
please provide a clear solution and answer within 30 minutes, thank you!
A certain county had a population of 34,485 people. The county hospital is interested in estimating the number of people in the county with blood type-O. To do this, they test blood samples from 228 patients. Out of this group, 10 have blood type-O. Use this sample to estimate the number of people in the county with blood type-O.
A pharmaceutical researcher wants to determine the proportion of people who believes that branded medicine is more effective than generic medicine. How many people should be sampled to be 95% confident that the estimate will be accurlte within 1% of the true population proportion?
Three products were used in a hot summer to keep the pool chlorine level high. Each product was used in 6 pools, and there was a total of 18 pools in the experiment. The same amount of chlorine was added to each pool (A, B, or C) and the conditions such as pool size, temperature, sun exposure etc. were similar. The chlorine levels (%) were measured and recorded after 24 hours of using the products. The percentages in the table below are the percentage of the chlorine added to the pool remaining after this 24 hours. The data is as follows: A 96 56 52 66 70 60 B 44 36 34 50 40 48 с 723227 34 40 20 24 a) Find the overall mean of the chlorine level across all the pools measured, and then find the mean of the chlorine level for each product.
Please help answering this one:
A researcher hypothesized that cytokinins and auxins supplied by tumor-inducing insects lead to the production of tumors in plants. She performed experiments in which she hypodermically injected green pepper plants to determine if she could induce tumors. In one experiment she varied the concentration of cytokinin and the ratio of auxin concentration to cytokinin concentration. She used 3 concentrations of cytokinin and 6 ratios of auxin/cytokinin. The concentrations are indexed (1-3) with 3 indicating the highest concentration of cytokinin. The 6 ratios of auxin/cytokinin varied from 0.125 to 5.0 with values greater than 1 indicating that auxin was in greater concentration than cytokinin. The resulting data are in the date file "auxcyt.csv". The measured sizes of the tumors induced (relative to controls) are given in the 3rd column ('sumdiffd'). Analyze these data testing the appropriate hypotheses and interpret the results. (Note the unequal sample sizes.) auxcyt data…
In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.† These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order. (a) Make the frequency table. (Round your relative frequencies to three decimal places.) (b) Make the histogram. (c) Make the relative-frequency histogram.
Use the figure to the right, which shows the percentages of adults from several countries who favor building new nuclear power plants in their country. The survey included random samples of 1051 adults from Country A, 1120 adults from Country B, 1048 adults from Country C, and 1013 adults from Country D. At a =0.05, can you support the claim that the proportion of adults in Country B who favor building new nuclear power plants in their country is different from the proportion of adults from Country C who favor building new nuclear power plants in their country? Assume the random samples are independent. 100- 80- 60 40 20- 0- I Country A 53% I Country B 47% O Country C 46% O Country D 34% Identify the claim and state Ho and Ha. The claim is "the proportion of adults in Country B who favor building new nuclear power plants in their country is the same as the proportion of adults from Country C who favor building new nuclear power plants in their country." greater than less than different…
A sports psychologist wants to compare the running time for athletes vs non-athletes while running 1 mile. He collects data from 226 non-athletes and 166 athletes and analyzes it using SPSS.

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