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Which of the following is a difference between a mean and a median? Group of answer choices A median is not meaningful for ratio data; a mean is meaningful to ratio data. A mean is an observation that occurs most frequently; a median is the average of all observations. A median is not affected by outliers; a mean is affected by outliers. A mean divides the data half above it and half below it; a median does not.
General
2 months ago
Nathan walked on an asphalt pathway for 12 miles. He walked the 12 miles back to his car on a gravel road through the forest. On the asphalt he walked 2 miles per hour faster than on the gravel. The walk on the gravel took one hour longer than the walk on the asphalt. How fast did he walk on the gravel?
General
2 months ago
Consider two markets: the market for cat food and the market for dog food. The initial equilibrium for both markets is the same, the equilibrium price is $5.50 , and the equilibrium quantity is 39.0 . When the price is $7.75 , the quantity supplied of cat food is 71.0 and the quantity supplied of dog food is 101.0 . For simplicity of analysis, the demand for both goods is the same. Using the midpoint formula, calculate the elasticity of supply for dog food. Please round to two decimal places. Supply in the market for cat food is
General
2 months ago
An automobile manufacturer claims that its van has a 27.6 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 210 vans, they found a mean MPG of 28.0. Assume the standard deviation is known to be 2.3. A level of significance of 0.05 will be used. Find the value of the test statistic. Round your answer to 2 decimal places.
General
2 months ago
The odds of an individual getting struck by lightening in one year are roughly 1 in a million; for this question assume this probability is exactly that ratio: 10−6 . In a randomly chosen set of eleven people, what are the odds that exactly 2 of them are hit by lightening in a given year? What is the correct probability distribution to use to answer this question? Why is this the correct choice of probability distribution?
General
2 months ago
Genghis Khan organized his men into groups of 10 soldiers under a "leader of 10." Ten "leaders of 10" were under a "leader of 100." Ten "leaders of 100" were under a "leader of 1000." *(a) If Khan had an army of 10,000 soldiers at the lowest level, how many men in total were under him in his organization? (b) If Khan had an army of 5763 soldiers at the lowest level, how many men in total were under him in his organization? Assume that the groups of 10 should contain 10 if possible, but that one group at each level may need to contain fewer.
General
2 months ago
A line passes through the point (–3, 4) and its y-intercept is (0, –2). What is the equation of the line that is parallel to the given line and passes through the point (–5, 2)?
General
2 months ago
Which is the best estimate of the correlation coefficient for the scatter plot?
General
2 months ago
In a lottery 5 different numbers are chosen from the first 90 positive integers. How many outcomes are there with the property that the last digits of all five numbers are different? (The last digit of 5 is 5 and the last digit of 34 is 4).
General
2 months ago
On a coordinate plane, rhombus W X Y Z is shown. Point W is at (7, 2), point X is at (5, negative 1), point Y is at (3, 2), and point Z is at (5, 5). What is the perimeter of rhombus WXYZ? StartRoot 13 EndRoot units 12 units StartRoot 13 EndRoot units D)>20 units
General
2 months ago
Suppose that the number of drivers who travel between a particular origin and destination during a designated time period has a Poisson distribution with parameter μ = 20 (suggested in the article "Dynamic Ride Sharing: Theory and Practice"†). (Round your answer to three decimal places.) (a) What is the probability that the number of drivers will be at most 18?
General
2 months ago
Suppose that the weight of seedless watermelons is normally distributed with mean 6.1 kg. and standard deviation 1.9 kg. Let X be the weight of a randomly selected seedless watermelon. Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N( , )b. What is the median seedless watermelon weight? [] kg.c. What is the Z-score for a seedless watermelon weighing 7.4 kg? []d. What is the probability that a randomly selected watermelon will weigh more than 6.5 kg? []e. What is the probability that a randomly selected seedless watermelon will weigh between 6.4 and 7 kg? []f. The 90th percentile for the weight of seedless watermelons is [] kg.
General
2 months ago
Suppose the heights of women at a college are approximately Normally distributed with a mean of 65 inches and a population standard deviation of 2.5 inches. What height is at the 20 th percentile? Include an appropriately labeled sketch of the Normal curve to support your answer.
General
2 months ago
There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is approximately normally distributed with mean 20.1 and standard deviation 5.1. The composite score on Exam B is approximately normally distributed with mean 1031 and standard deviation 215. Suppose you scored 24 on Exam A and 1167 on Exam B. Which exam did you score better on? Justify your reasoning using the normal model.A.The score on Exam B is better, because the score is higher than the score for Exam A. B.The score on Exam A is better, because the percentile for the Exam A score is higher. C.The score on Exam A is better, because the difference between the score and the mean is lower than it is for Exam B. D.The score on Exam B is better, because the percentile for the Exam B score is higher.
General
2 months ago
Is ∆JKL ≅ ∆KJM ? Justify your answer below.
General
2 months ago
You spend 264 on clothes. Shirts cost 24 and pants 32 you buy total of nine items write a system of linear equations that represents this situation
General
2 months ago
Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10 d plus 0.05 n equals 5.25, where d represents the number of dimes and n represents the number of nickels. If Sonji has 21 dimes, how many nickels does she have? 354263105
General
2 months ago
Problems continue to arise in Kitty Nation but Hello Kitty has regained control of the country. She comes to see that popular dislike for the own measurement standard led to the revolt. She decides to change the standard so that such a terrible catastrophe never befalls Kitty Nation ever again. The standard for measurement of length in Kitty Nation is now 7 lenthii = 38 inches and 10 gianthii = 410.0 lenthii. If a design to be sent to Kitty Nation is 225.3 feet long, how many centigianthii long will it be? (Note: centi is an SI prefix, include units)
General
2 months ago
Suppose you are running a racing tournament with 12 horses. All eligible horses run in the race at once, and after the first race, the last two horses are eliminated. a) Find the total number of possible finishes of the first race. b) How many different possible groups are there for the second race? (Show work)
General
2 months ago
Suppose you need to know an equation of the tangent plane to a surface S at the point P (2,1,3). You don't have an equation for S but you know that the curves:r1(t) = (2+3t, 1-t^2, 3-4t+t^2)r2(t) = (1-u^2, 2u^3-1, 2u+1)both lie on S. Find an equation of the tangent plane at P.*Note: both r1 and r2 are vectors
General
2 months ago
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