19 <1< 211521 <1< 231123 <1< 2575 of 8a) What is the modal class?b) Which class contains the median?c) Calculate an estimate for the mean of this data.d) Calculate an estimate for the standard deviation of this data.Criteria 3.5: Estimate the size of a population by the release and recapture method.1. In a wooded area was 50 woodlice were captured. These were marked and released. Thenext day a total of 75 woodlice were captured. 15 of these were found to be marked.Calculate the population of woodlice present in the wooded area.2.Over the period of a month, you trap and tag 15 deer in a forest, and mark themwith tags. You set up motion sensitive remote cameras up at various locations inthe forest. 1 month later, you collect all the cameras and review the pictures. Yourecord the results and note that the cameras took pictures of 4 tagged deer and 7untagged Deer. What would be the total population of deer in the forestreserve?Criteria 3.4: Calculate and interpret a correlation coefficient.1. Gary compared the total attendance, x, at home matches and the total number of goals, y, scored athome during a season for each of 12 football teams playing in a league. He correctly calculated:Str = 1022500Sy = 130.9S = 8825 10:01 1ll ?SearchRingerMarjaCriteria 3.4: Calculate and interpret a correlation coefficient.1. Gary compared the total attendance, x, at home matches and the total number of goals, y, scored athome during a season for each of 12 football teams playing in a league. He correctly calculated:Syr = 1022500Sy= 130.9Sxy= 8825(a)Calculate the product moment correlation coefficient for these data.(b)Interpret the value of the correlation coefficient.2.A scientist wants to develop a model to describe the relationship between the average dailytemperature, x °C, and her household's daily energy consumption, y kWh, in winter.A random sample of the average daily temperature and her household's daily energyconsumption are taken from 10 winter days and shown in the table.-0.4-0.20.30.81.11.41.82.12.52.628302625262726242221You may use:Σy = 255Exy = 283.8Syy= 64.5a) Find a value for the product moment correlation coefficient r for this data.b) Explain what the value of the product moment correlation tells you about the relationship between thedaily temperature and the household energy consumption.4.2. Calculate the results of combining errors when substituting valuesin formulae.

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Answered: 1. Gary compared the total attendance,…

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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Choose the value of the Pearson's Correlation Coefficient (r) that best describes the two plots. : 0.504, II: -0.232. 2) I: -0.904, II: 0.232. 3) I: 0.904, II: -0.232. 4) I: -0.232, II: 1.304. 5) I: 0.904, II: -0.632.
After a first-order model was fitted to the data, the coefficient of correlation between the usage in hours per week (x) of a particular brand of computer and the maintenance cost of the computer (y) is calculated as 0.84. Interpret the value of the coefficient of determination.
A data set contains information on the grams of fat and number of calories in 24 different fast foods. The correlation coefficient between fat content and calories is determined to be -0.63. Calculate the p-value for the test of significance.
if the slope is negative then is the correlation coefficient also negative?
An ecologist is interested in exploring the relationship between pollination rate and the number of bees present at apple orchards. The relationship is: (Pollination rate) = 372.6 + 13.5 x (bees) with r = 0.80. The best interpretation of the correlation coefficient is: (pick one) 1. 64% of the variability in pollination rate observed at apple orchards is explained by the relationship with the number of bees 2. the correlation between pollination rate and number of bees is 0.64 3. 80% of the variability in number of bees at apple orchards is explained by the relationship with the pollination rate 4. the correlation between pollination rate and number of bees is 0.80
The correlation between autonomy (how independent and in control of their own decisions someone feels) and sleep disturbance is -0.327. Explain this correlation in terms of size and direction (note: use the actual variables in your explanation).
A nutritionist collects data from 25 popular breakfast cereals. For each cereal, the number of calories per serving is plotted on the x-axis against the number of milligrams of sodium on the y-axis. The value of r for the resulting scatterplot is 0.83. How would the value of the correlation coefficient, r, change if sodium was plotted on the x-axis and calories plotted on the y-axis? The value of r would increase. The value of r would not change. The value of r would change to –0.83. The value of r could increase or decrease, depending of the strength of the new relationship.
how can i calculate
Suppose data are collected concerning the weight of a person in pounds and the number of calories burned in 30 minutes of walking on a treadmill at 3.5 miles per hour. How would the value of the correlation coefficient, r, change if all of the weights were converted to kilograms?
A data set contains information on the grams of fat and number of calories in 25 different fast foods. The correlation coefficient between fat content and calories is determined to be 0.69. Calculate the p-value for the test of significance.
A data set contains information on the grams of fat and number of calories in 25 different fast foods. The correlation coefficient between fat content and calories is determined to be 0.62. Calculate the p-value for the test of significance.
A researcher studied the relationship between the amount of carbohydrates (x) and the amount of salt (y) in different food products. sample of 36 food products yielded these calculations: r = -0.1245, ŷ=0.5545– 0.1636x According to the correlation, if a food contains more carbohydrates, is it likely to contain more salt or less salt? Why or why not?

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