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Q: The response variable for this study is:
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Q: when a single die is thrown, it has 6 outcomes since it has 6 faces. what is the sample space ?
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- What does the y -intercept on the graph of a logistic equation correspond to for a population modeled by that equation?Table 6 shows the population, in thousands, of harbor seals in the Wadden Sea over the years 1997 to 2012. a. Let x represent time in years starting with x=0 for the year 1997. Let y represent the number of seals in thousands. Use logistic regression to fit a model to these data. b. Use the model to predict the seal population for the year 2020. c. To the nearest whole number, what is the limiting value of this model?What might a scatterplot of data points look like if it were best described by a logarithmic model?
- Planetary Velocity The following table gives the mean velocity of planets in their orbits versus their mean distance from the sun. Note that 1AU astronomical unit is the mean distance from Earth to the sun, abut 93 million miles. Planet d=distance AU v=velocity km/sec Mercury 0.39 47.4 Venus 0.72 35.0 Earth 1.00 29.8 Mars 1.52 24.1 Jupiter 5.20 13.1 Saturn 9.58 9.7 Uranus 19.20 6.8 Neptune 30.05 5.4 Astronomers tell us that it is reasonable to model these data with a power function. a Use power regression to express velocity as a power function of distance from the sun. b Plot the data along with the regression equation. c An asteroid orbits at a mean distance of 3AU from the sun. According to the power model you found in part a, what is the mean orbital velocity of the asteroid?Enter the data from Table 2 into a graphing calculator and graph the ranking scatter plot. Determine whetherthe data from the table would likely represent a function that is linear, exponential, or logarithmic.Consider a simple model to explain a country’s alcohol related automobiles incidents (totaai) in terms of police police officers (topps): Estimating (a) using quarterly data from 1991-2024 gives: log(totaait) = 12.58 − 0.66 log(topps); (2.22) (0.33) n = 95; R2 = :439; 3. Suppose that both total alcohol incidents (totaai) and total police officers (totts) have a positive trend. Given this information, discuss whether the OLS estimates of ˛1 from equation (a) is unbiased (i.e., E(˛ˆ 1) = ˛1)?
- Please answer the following three multiple choice question: (2) A total predicted logit of 0 can be transformed to a probability of? 0 5 1 75 (3) Which of the following criteria is the most optimal for assessing the goodness of the fit of a multiple linear regression model? Adjusted R2 R2 The intercept The coefficient (4) When there are two predictor variables in a multiple regression model, what does the following expression (H0: β1 = β2 = 0) mean? One of the independent variables is useful in predicting the dependent variable Both of the independent variables are useful in predicting the dependent variable None of the independent variables is useful in predicting the dependent variable There is a third independent variable predicting the dependent variableUnit 5 Lab Background: Between the years of 1997 and 2003, the World Health Organization collected data on head circumference, arm circumference, and other body measurements for 8440 children from Brazil, Ghana, India, Norway, Oman and the USA. All of the children were healthy and breastfed by mothers who did not smoke. Children in the sample lived in socioeconomic conditions favorable to normal physical growth. Variables such as parental education level and income level were used to exclude children whose growth was “environmentally constrained”; however, low-weight full term babies were included if their mothers met socioeconomic and nutritional criteria. In short, the study design attempted to include healthy children from a wide range of ethnic and cultural groups whose home environments reasonably assured the conditions for healthy physical growth. This data was used to produce growth charts that are part of every pediatrician’s toolkit for monitoring a child’s overall…A study was done to look at the relationship between number of lovers college students have had in their lifetimes and their GPAs. The results of the survey are shown below. Lovers 2 1 4 3 0 7 1 4 7 GPA 3.5 3.5 2.6 3.5 3.2 1.7 3.1 2.8 2 Use the model to predict the GPA of a college student who as had 2 lovers.GPA = (Please round your answer to one decimal place.)
- It has been noted that the amount of time people spend shopping in supermarkets has decreased due to the global pandemic. Based on this realization, the manager of Power Supermarket decided to collect data for the length of time people spend in his supermarket during a one week period. He is aiming to use the data to help him decide if the supermarket should be converted to a virtual supermarket/a delivery based one. Before the pandemic Time Frequency 1-5 50 6-10 25 11-15 22 16-20 80 20-25 60 25-30 45 30-35 35 After the pandemic Time Frequency 1-5 30 6-10 65 11-15 45 16-20 50 20-25 35 25-30 40 20-35 35 Use the information above to construct two frequency polygons. Do you think that Power Supermarket should close their doors? Explain your answer. *Assume that a person who spends more time in a supermarket buys a lot of goods and a person who spends a short time in a supermarket,…ZIMS store sells its products on installments in Karachi. The store decided to investigate the link between the life of the product and the cost. The data collected from store is shown in Table 1.1Table 1.1LIFE OF PRODUCT (Years) COST (Thousand Rupees)3.0 253.5 284.0 324.5 345.0 343.0 305.5 404.5 404.0 423.5 426.0 507.5 508.0 538.5 55a) Plot a scatter chart from the above data.b) Find the equation of the least square regression line in the form ? = ? + ??Given the value of a and b up to 3 decimal places. c) What are the exact interpretations of the estimated regression factors? d) Using your answer of part (b). Find the cost predicted by the regression line for 6.5 year’s life of a product.