When we discuss measures of center and spread, there are certain ones that go together, and certain ones that do not. If we talk about the center in terms of the mean, then spread is described using the ["", ""] . If we talk about the center in terms of the median, then the spread is described using the ["", ""] .
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When we discuss measures of center and spread, there are certain ones that go together, and certain ones that do not.
If we talk about the center in terms of the mean, then spread is described using the ["", ""] .
If we talk about the center in terms of the median, then the spread is described using the ["", ""] .
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- given the observed data (obsX,obsY), learning rate (alpha), error change threshold, and delta from the huber loss model,write a function returns theta0 and theta1 that minimizes the error. Use pseudo huber loss functionWhat does it mean to measure centrality and the spread of a variable with at least two measures each? Using RYou build a model predicting blood pressure as a function of three variables: weight (numeric) age (numeric) income (categorical: low, medium, high) You first specify your model as: blood pressure ~ age * income + weight How many parameters (k) does your model have? (Remember, we do not count the grand mean in k) You change the above model specification to be: blood pressure ~ age * income + weight * income How many parameters does your model have now? You change your model to include the three-way interaction (which, remember, includes all two-way interactions and main effects, too!) Your model now looks like this: blood pressure ~ age * income * weight How many parameters does your model have now?
- A publisher plans to boost the sales of its most popular magazine by sending out promotional mails. We refer to a customer as a responder if he/she subscribes to the magazine for the next year after receiving a promotional mail. Otherwise the customer is referred to as a non-responder. Denote responder by C1 and non-responder by C2. The publisher has built a model to classify each customer as either a responder or a non-responder. In practice only 1% of the customers are responders, and the remaining 99% are non-responders. In order to build an unbiased model, the publisher employed the oversampling method in creating the training set and the validation set, such that both datasets contain 50% responders and 50% non-responders. The validation confusion matrix is given below. Actual Class C1 C2 Predicted Class C1 645 112 C2 255 788 Round your answers to 3 digits after the decimal point. The oversampling factor of C1 is . The oversampling factor of…The value y (in 1982-1984 dollars) of each dollar paid by consumers in each of the years from 1994 through 2008 in a country is represented by the ordered pairs. (1994, 0.676) (1996, 0.638) (1998, 0.608) (2000, 0.584) (2002, 0.556) (2004, 0.528) (2006, 0.494) (2008, 0.461) (1995, 0.658) (1997, 0.622) (1999, 0.599) (2001, 0.568) (2003, 0.543) (2005, 0.509) (2007, 0.486) (a) Use a spreadsheet software program to generate a scatter plot of the data. Let t = 4 represent 1994. Do the data appear linear? O Yes No (b) Use the regression feature of the spreadsheet software program to find a linear model for the data. (Let t represent time. Round your numerical values to four decimal places.) y 3= (c) Use the model to predict the value (in 1982-1984 dollars) of 1 dollar paid by consumers in 2010 and in 2013. (Round your answers to two decimal places.) 2010 2013 24 Discuss the reliability of your predictions based on your scatter plot and the graph of your linear model for the data. Because the…Use an Euler diagram to determine validity: All professional comedians are funny. Some funny people are math professors. Therefore some professional comedians are math professors.
- Use R programming to solve the questions and include the pictures of the codes thanksIn the simple linear regression equation ŷ = bo + b₁x, how is b₁ interpreted? it is the change in that occurs with a one-unit change in y O It is the estimated value of ŷ when x = 0 O It is the change in ŷ that occurs when bo increases O it is the change in ŷ that occurs with a one-unit change inWhat does the z-score of a data point tell us? Group of answer choices How many standard deviations a number is from the mean. How many IQR the max and min are from the mean. How far a number is from the mean. How many IQR a number is from the mean.
- Suppose you wish to study the relationship between the number of 'likes' on Facebook and the number of 'friends' one has on Facebook. Describe the statistical technique you would use.consider a population where 30% is in poverty. If you randomly sampled 10 people, how many would you expect to be in poverty?An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 40, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 10 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that at least 10 of these are from the second section? (Round your answer to four decimal places.) (c) What is the probability that at least 10 of these are from the same section? (Round your answer to four decimal places.) (d) What are the mean value and standard deviation of the number among these 15 that are from the second section? (Round your mean to the nearest whole number and your standard deviation to three decimal places.) mean projectsstandard deviation projects (e) What are the mean value and standard deviation of…