Hi! I pretty much don't understand these problems that were presented on my Statistics class An engineer wants to determine how the weight of a car, x, affects gas mileage, y (MPG). The followingdata represent the weights of various cars and their miles per gallon.Make a scatter plot. (Carefullychoose units on both axes; no need tostart at 0, but make them not too small!Do not omit axis labels and the title.)Describe the relationshipbetween Car Weight and MPG.Justify. Give the correlationcoefficient to three decimalplaces. (CV are listed on the lastpage)CarWeight (pounds), xMiles per Gallon, yA B C D E2750 2940 3265 3765 412025.4 25.1 25.4 19.8 20.2If it makes sense, give the equation of the regression line (of MPG on pounds of weight; use at least 3significant, nonzero, digits) and draw this line on the plot (be precise! use a ruler.)Is the gas mileage (miles per gallon) of the car B above average or below average for cars of the sameweight? Justify.What is the best predictor of MPG for a car with weight of 5500 lb. (Be careful!) The graph of the discrete probability below represents the number of live births by a mother 46 to 51years old who had a live birth in 2017.Probability0.30-0.25-0.20-0.150.100.05-0.00-0places.)0.2390.2510.1690.1120.0970.036 0.04135Number of Live Births0.0558Find the means and standard deviation of the probability distribution. (Round to three decimalWhat is the probability that a randomly selected mother 46 to 51 years old who had a livebirth in2017 has had her first live birth in that year?What is the probability that a randomly selected mother 46 to 51 years old who had a livebirth in2017 has had her at most second live birth in that year?If a mother 46 to 51 years old who had a live birth in 2017 is randomly selected, how many live birthswould you expect the mother to have had? (Round to one decimal place if needed.)

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Answered: An engineer wants to determine how the…

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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The table is all messed up...
A problem with a phone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telecommunications company. The file “Phone” contains samples of 20 problems reported to two different offices of a telecommunications company and the time toclear these problems (in minutes) from the customers’ lines: Central Office I Time to Clear Problems (minutes) 1.48 1.75 0.78 2.85 0.52 1.60 4.15 3.97 1.48 3.10 1.02 0.53 0.93 1.60 0.80 1.05 6.32 3.93 5.45 0.97 Central Office II Time to Clear Problems (minutes) 7.55 3.75 0.10 1.10 0.60 0.52 3.30 2.10 0.58 4.02 3.75 0.65 1.92 0.60 1.53 4.23 0.08 1.48 1.65 0.72 Assuming that the population variances from both offices are not equal, is there evidence of a difference in the mean waiting time between two offices? (Use a = 0.01) ▪ You may need to download file “Phone”. Referring to Table 10-2, which of the following is an appropriate null hypothesis? Question 2 options: 1)…
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1)Should you use the median or mean to describe a data set if the data are not skewed? 2) You may read in the newspaper that a study of a new drug for cancer “increased survival by an average of 8weeks.” It turns out that this is a median, and it is used for complicated statistical reasons. But in a perfectworld, would you prefer to know the increase in mean or median survival? 3) If the median house price is $1.9m, does that necessarily mean that half of the houses on the block areworth less than $1.9m and half worth more?
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What is the shape of this data analysis?

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