A statistics student is studying if there is a relationship between the price of a used car and the number of miles it has been driven. She collects data for 20 cars of the same model with different mileage, and determines each car's price using a used car website. The analysis is given in the computer output. Coef SE Coef t-ratio Predictor Constant 24157.2 2164.1 2.965 0.046 Mileage -0.181 θ.024 5.377 0.000 s = 3860.7 R-Sq = 68.0% R-Sq(Adj) = 67.5% Using the computer output, what is the equation of the least-squares regression line? O y = -0.181 + 24157.2x O ý = 24157.2 – 0.181x O ý = 2164.1+ 0.024x ý = 0.024 + 2164.1x
Q: The number of gallons of milk sold each day at a grocery store is an example of .Variable. Select…
A:
Q: The coast-down time y for a car as it drops 10 mph from an initial speed x depends on several…
A: The coast-down time y for a car as it drops 10 mph from an initial speed x depends on several…
Q: 2. DeShawna and her team gathered data for their ball and recorded it in the table shown below.…
A: The given question can be solved as shown in step2.
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: Find the explanation below
Q: A melittologist measures the population P(t) of a bee hive after t months and records the results…
A: a). According to given table slope at given point is: P'2=P4-P04-0P'2=22500-50004=4375…
Q: The table lists how poverty level income cutoffs (in dollars) for a family of four have changed over…
A:
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: Given,Y=ax+ba=-0.975b=34.163r2=0.6241r=-0.79
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: The equation of the regression line is, y = - 0.953x + 25.096 Where, x = hours of tv watched per…
Q: A man is running around a circular track that is 200 m in circumference. An observer uses a…
A:
Q: e following table shows the height at half-second intervals of a rock that breaks free from the top…
A: We are asked to find the model.
Q: The process reaction curve of a temperature control system gives the value of: I K=6.8 T= 2.5…
A:
Q: (Review Algebra 1: y = mx + b) Find the slope, m, of the function 3x + 7y = 9 Sample solution: for -…
A:
Q: An outbreak of the deadly Ebola virus in 2002 and 2003 killed 91 of the 95 gorillas in 7 home ranges…
A: Correlation Correlation is a statistical concept that refers to the level toward which two variables…
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: Given ,a=23.237b=-1.168r=-0.613Regression equation is y=a+bx
Q: A student fits two linear model functions to their data on a scatter plot. A line with a slope of…
A: Chi-square test has got multiple usefulness.
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A:
Q: y= is the subjects gpa X= time spent reading the newspaper Prediction Equation: y(hat)…
A: The value of R2 is given as 0.003.
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: Given: x is the hours of TV watched per day. y is the number of sit ups a person can do. The…
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: The regression line equation is as follows:
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: Given that y = ax +b a = -0.791 b = 27.682 r2 = 0.906304 r = -0.952
Q: The population of a small country by year is shown in the table below. Year 1960 1955 284496…
A: As per our guidelines we will answer first 3 subpart. Kindly repost other questions.
Q: 1) What percent of income do people spend for their living expenses? The following computer output…
A:
Q: The speed of a runner increased steadily during the first three seconds of a race. Her speed at…
A:
Q: Do as indicated. 1. The heat index (HI) is an estimate of the temperature felt by the human body…
A:
Q: y= Deflection (mm) 16.473 18.693 14.305 15.121 13.505 11.64 11.168 12.534 11.224 a. Calculate the…
A: *Answer: EXCEL output: From EXCEL output, the regression equation is, From EXCEL output,…
Q: the minimum wind speed generated by the storm. Frequency of Hurricane Direct Hits Category Number of…
A: We have given that the relative frequency table represents hurricanes that have made direct hits on…
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A:
Q: b. What is the dependent variable? Time it takes to eat the eggs or eating speed c. What level of…
A: Note: Thank you for the question. As you have specifically asked for help with Part (c), it is the…
Q: A man is running around a circular track that is 200 m in circumference. An observer uses a…
A:
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: We have given that x : hours of TV watched pr day y : number of sit-ups a person can do The…
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: Solution: From the given information, X be the number of hours TV watched per day and Y be the…
Q: 38. Given the data for 2015-16 and 2016-17: Commodity A Commodity Po 1. Pi 10 91 where p and q…
A: First we have to find the Laspeyres and Paasche index numbers.
Q: The unemployment rate U(t) varies with time. The table gives the percentage of unemployed in a…
A: To construct a table of values for U'(t).
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (X)…
A: Given - A Regression was run to determine if there is a relationship between hours of TV watched per…
Q: Mrs. Anderson shows her students the function in the coordinate plane and asks them to determine the…
A: The average rate of change of a function f(x) in some interval [a,b] is given by: Average rate of…
Q: Estimate Std. Error t value Pr(>|t|) (Intercept) beers -0.0127 0.0126 -1.00 0.3320 0.0180 0.0024…
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: A mammal's resting heart rate is the number of times its heart beats each minute when it is relaxed…
A: The problem has given the relationship formula for the independent and dependent variables. By…
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: The value of slope (a) is -1.319 and the intercept (b) is 38.85.
Q: A weather station recorded the amount of rain that fell during an 8-hour time frame using a rain…
A: We are given the following information. Let us first find the rate between 0 and 1, 1 and 4, 4 and…
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A:
Q: A regression was run to determine if there is a relationship between hours of TV watched per day…
A: We have to find predicted value for given data..
Q: Which of the following best describes Direct Variation? A Represents the value of the relationship…
A: Direct variation describes the relationship between two variables. Consider two variables x and y…
Q: A regression was run to determine if there is a relationship between hours of tv watched per day (x)…
A:
Q: The table lists how poverty level income cutoffs (in dollars) for a family of four have changed over…
A: To approximate the poverty level cutoff in 1987
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: We have given a regression equation and we have to predict the value of y for given x.
Q: egression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: y^ = ax + b
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A: The predicted value of the number of situps a person who watches 7.5 hours of TV can do is,
Q: Average speed (mph) Number of laps 0<s < 140 140 < s < 145 20 145 < s < 150 32 150 < s < 155 57 155…
A: From given table
Q: In the model in the table below, how is "1.3" interpreted? Model R2 Standard error y = 5 + 1.3x 0.68…
A: Given:
Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…
A:
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- A researcher hypothesizes that electrical stimulation of the lateral habenula will resultin a decrease in food intake (in this case, chocolate chips) in rats. Rats undergostereotaxic surgery and an electrode is implanted in the right lateral habenula. Followinga ten day recovery period, rats (kept at 80 percent body weight) are tested for thenumber of chocolate chips consumed during a 10 minute period of time both with andwithout electrical stimulation. The testing conditions are counter balanced. Compute theappropriate t-test for the data provided below.Stimulation No Stimulation12 87 73 411 148 65 714 127 59 510 8What probability level did you choose and why?What were your degrees of freedom?Is there a significant difference between the two testing conditions?Interpret your answer.If you have made an error, would it be a Type I or a Type II error? Explain youranswer.A researcher hypothesizes that electrical stimulation of the lateral habenula will resultin a decrease in food intake (in this case, chocolate chips) in rats. Rats undergostereotaxic surgery and an electrode is implanted in the right lateral habenula. Followinga ten day recovery period, rats (kept at 80 percent body weight) are tested for thenumber of chocolate chips consumed during a 10 minute period of time both with andwithout electrical stimulation. The testing conditions are counter balanced. Compute theappropriate t-test for the data provided below.Stimulation No Stimulation12 87 73 411 148 65 714 127 59 510 81. What is your computed answer?2. What would be the null hypothesis in this study?3. What would be the alternate hypothesis?4. What probability level did you choose and why?5. What were your degrees of freedom?6. Is there a significant difference between the two testing conditions?7. Interpret your answer.8. If you have made an error, would it be a Type I or a Type II…According to a newspaper study of more than 1 million medical dispatches from 2007 to 2012, the 911 response time for medical aid varies dramatically across a city. Under national standards adopted by the city's fire department, rescuers are supposed to arrive within six minutes to almost all medical emergencies. But the newspaper analysis found that in affluent hillside communities of the city, firefighters failed to hit that mark nearly 85% of the time. The following data show the response times, in minutes, for 10 emergency calls in the Griffith Park neighborhood. 11.8 10.3 10.7 10.6 11.5 8.3 10.5 10.9 10.7 11.2 Based on this sample of ten response times, compute the descriptive statistics (in minutes) in parts (a) and (b) and then answer the questions in parts (c) and (d). (a) mean, median, and mode (in min) mean minmedian minmode min (b) range and standard deviation (in min) (Round your answers to four decimal places.) range minstandard deviation min (c) Compute…
- The manager of the purchasing department of a large banking organization would like to develop a model to predict the amount of time it takes to process invoices. Data are collected from a sample of 30 days with the following results: Relating time to invoices processed. Day Invoices Processed Completion Time (hours) Day Invoices Processed Completion Time (hours) 1 149 2.1 16 169 2.5 2 60 1.8 17 190 2.9 3 188 2.3 18 233 3.4 4 19 0.3 19 289 4.1 5 201 2.7 20 45 1.2 6 58 1.0 21 193 2.5 7 77 1.7 22 70 1.8 8 222…According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft. In that year, Alaska had 321 complaints of identity theft out of 1,432 consumer complaints ("Consumer fraud and," 2008). Does this data provide enough evidence to show that Alaska had a lower proportion of identity theft than 23%? Test at the 5% level. (v) Do values for np and nq both exceed 5? Enter YES or NO for answer (vi) Calculate and enter test statistic Enter value in decimal form rounded to nearest thousandth, with appropriate sign (no spaces). Examples of correctly entered answers: –2.014 –0.370 +0.600 +1.009 (vii) Using tables, calculator, or spreadsheet: Determine and enter p-value corresponding to test statistic. Enter value in decimal form rounded to nearest thousandth. Examples of correctly entered answers: 0.000 0.001 0.030 0.600 0.814 1.000In the packaging department of a large aircraft parts distributor, a fairly reliable estimate ofpackaging and processing costs can be determined by knowing the weight of an order. Thus, theweight is a cost driver that accounts for a sizable fraction of the packaging and processing costsat this company. Data for the past 10 orders are given as follows:
- a servery of 1200 adults and children in the unittest states has shown that more people have lost a close connection with nature , although a wide cross section of respondents expressed a serie to close that gap. the study the nature of american national repor, found that more than half of adults reported spending five hours or less in nature each week, and begin satisfied with the small amount of time spent outdoors. parents of children 8-12 old siad that their child spend three times as many hours outside . the study said it was common for older adults who grow up spent less time in nature. in addtiontio to the lure of techology people speding less time in nature beacuse of where they work., live and go to school. the study showed the minority groups and young adults faced more barriers to getting inot nature than other groups. what is the population of interest? be as specific as possible what tyoe of study is this? specifiy whether observational or experiment and…At the end of summer, the total weight of seeds accumulated by a nest of seed-gathering ants will vary from nest to nest. If the expected total weight of seeds gathered by a randomly chosen nest is 5 pounds, and the standarddeviationis0.5pounds,whatistheprobabilitythatthetotalcombinedweightoftheseedsgatheredby100 nests will be larger than 495 pounds by the end of next summer? To answer this question most accurately, given the information available, we would use: 1. Chebyshev’s theorem 2.Markov’s theorem (3.The Central Limit Theorem 4.The joint probability that the weight of seeds is larger than 5 pounds in each nest.A physical education director claims by taking a special vitamin, a weight lifter can increase his strength. Eight athletes are selected and given a test of strength, using the standard bench press. After 2 weeks of regular training, supplemented with the vitamin, they are tested again. Test the effectiveness of the vitamin regiment at = 0.05 Athlete 12345678 Before 210 230 182 205 262 253 219 216 After 219 236 179 204 270 250 222 216
- There is some evidence that, in the years 1981— 85, a simple name change resulted in a short-term increase in the price of certain business firms' stocks (relative to the prices of similar stocks). (See D. Horsky and P. Swyngedouw, "Does it pay to change your company's name? A stock market perspective," Marketing Science v.6 pp. 320— 35, 1987.) Suppose that, to test the profitability of name changes in the more recent market (the past five years), we analyze the stock prices of a large sample of corporations shortly after they changed names, and we find that the mean relative increase in stock price was about 0.76%, with a standard deviation of 0.12%. Suppose that this mean and standard deviation apply to the population of all companies that changed names during the past five years. Complete the following statements about the distribution of relative increases in stock price for all companies that changed names during the past five years. (a)According to Chebyshev's theorem,…Floyd Distributors, Inc., provides a variety of auto parts to small local garages. Floyd purchases parts from manufacturers according to the EOQ model and then ships the parts from a regional warehouse direct to its customers. For a particular type of muffler, Floyd's EOQ analysis recommends orders with Q* = 20 to satisfy an annual demand of 180 mufflers. Floyd's has 250 working days per year, and the lead time averages 15 days.Note: Use Appendix B to identify the areas for the standard normal distribution. What is the reorder point if Floyd assumes a constant demand rate? If required, round your answer up to the nearest whole number. r = fill in the blank 1 Suppose that an analysis of Floyd's muffler demand shows that the lead-time demand follows a normal probability distribution with µ = 12 and σ = 2.2. If Floyd's management can tolerate one stock-out per year, what is the revised reorder point? If required, round your answer up to the nearest whole number. r = fill in the blank…A random sample of 1019 adults in a certain large country was asked "Do you pretty much think televisions are a necessity or a luxury you could do without?" Of the 1019 adults surveyed,518 indicated that televisions are a luxury they could do without. Complete parts (a) through (e) below. Obtain a point estimate for the population proportion of adults in the country who believe that televisions are a luxury they could do without. P hat =