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MATH SOLVE
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The University of Florida is interested in determining if there is a difference in the amount of money spent on food every two weeks between male and female students. They take a random sample of 20 male students (group 2) and 20 female students (group 1). They also find that xbar2 is 132 with a standard deviation of 13, and xbar1 is 131 with a standard deviation of 38. Do not assume equal variances. Find the test statistic for the difference in the amount of money spent. (Round your answer to one number after the decimal.)
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4 months ago
a silo is shaped like a cylinderwith a cone on top. the radii of the bases of the cylinder and cone are both equal to 8 feet. the hight of the cylindrical part is 25 feet and the height of the cone is 6 feet. what is the volume of the entire silo?
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4 months ago
An opaque bag contains 5 green marbles, 3 blue marbles, and 2 red marbles. If a marble is drawn at random what are the ODDS of drawing a red marble? 1:21:41:54:5
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4 months ago
In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. They found that a substantially greater percentage of U.K. ads use humor. (a) Suppose that a random sample of 387 television ads in the United Kingdom reveals that 130 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.K. television ads that use humor.
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4 months ago
9. Which of the following is TRUE? ( 5 points) a. For a data set with mean = 25 pounds and Standard Deviation = 2 pounds then 95% of the data is between 23 pounds and 27 pounds. b. For a data set with mean = 25 pounds and Standard Deviation = 3 pounds then 95% of the data is between 22 pounds and 28 pounds. c. For a data set with mean = 25 pounds and Standard Deviation = 3 pounds then 65% of the data is between 19 pounds and 31 pounds. d. For a data set with mean = 25 pounds and Standard Deviation = 3 pounds then 95% of the data is between 19 pounds and 31 pounds.
General
4 months ago
Simplify: (3x^2 – 5xy + 2y^2)-(7x^2 – 3xy - 3^2)
General
4 months ago
Kathy has $50,000 to invest today and would like to determine whether it is realistic for her to achieve her goal of buying a home for $150,000 in 10 years with this investment. What return must she achieve in order to buy her home in 10 years?a) About 12%b) About 13%c) About 9%d) About 10%
General
4 months ago
after two years on the job, an engineer salary was $60,000. after seven years on the job, her salary was $66,000. let y represent her salary after x years on the job. Assuming that the change in her salary over time can be approximated by a straight line, give an equation for this line in the form y=mx+b
General
4 months ago
A computer manufacturer uses chips from three sources. Chips from sources A, B, and C are defective with probabilities 0.005, 0.001, and 0.010, respectively. You can assume that the proportions of chips from A, B and C are 0.5, 0.1, and 0.4 respectively. If a randomly selected chip is found to be defective, find the probability that the manufacturer was A and the probability that the manufacturer was C.
General
4 months ago
A bicyclist is riding to the left with a velocity of 14 m/s . After a steady gust of wind that lasts 3.5 s, the bicyclist is moving to the left with a velocity of 21 m/s Assuming the acceleration is constant, what is the acceleration of the bicyclist?
General
4 months ago
answer correctly / explain a little.Melt Away Weight Loss uses the regression equationy = 1.8x + 1.2 to predict the weight loss of their clients.In the equation:x = the number of weeks on a dietandy = the total number of pounds lost. Using the equation, how much weight did Steve lose in 4 weeks? A) 7.5 pounds B) 8.4 pounds C) 9.6 pounds D) 10 pounds
General
4 months ago
Given p(x)=3x5+2x2−5, Alonso wants to find out whether 3x+5 is a factor. Which value of x should he evaluate for p(x) to determine the answer?−5/33/55/3−3/5What is the value of the function at the x-value you selected?
General
4 months ago
Choose the equation below that represents the line that passes through the point (7,2) and has a slope of -3
General
4 months ago
Water is being pumped into an inverted conical tank at some constant rate. The tank has a height of 600 cm and the diameter of the tank across the top is 400 cm. If the water level is rising at a rate of 20 cm/min when the height of the water is 200 cm, find the rate at which water is being pumped into the tank. (Round your answer to the nearest integer.)cm3/min
General
4 months ago
Find the coordinates of the y-intercept and the x-intercept, in that order -2x + y =6
General
4 months ago
Explain how different forms of data representation assist business decision-makers in their jobs.
General
4 months ago
When two electrical resistors with resistanceR1>0 andR2>0 are wired in parallelin a circuit, the combined resistanceR, measured in ohms (Ω), is given by1R=1R1+1R2(a) Find∂R∂R1and∂R∂R2after solving forR(e.g.,R=. . .).(b) Describe how an increase inR1withR2held constant affectsR. (WillRincreaseor decrease?)(c) Describe how a decrease inR2withR1held constant affectsR. (WillRincreaseor decrease?)
General
4 months ago
Charlie runs a book rental business. He currently charges $3 per book and rents out an average of 38 books a day. According to a study, for every 50¢ increase in rental price, the average business can expect to lose 4 rentals a day. Complete the equation that models this scenario, where b(x) is the revenue generated and x is the number of 50¢ price increases.
General
4 months ago
write -6/11 * 3/4 lowest terms
General
4 months ago
(3) Finding Dory Coral Reef communities are home to one-quarter of all marine plants and animals worldwide. These reef support large fisheries by providing breeding grounds and safe havens for young fish of many species. Coral reefs are seawalls (protecting shorelines from tides, storm-surges, and hurricanes as well as produce the limestone and sand of which beaches are made), Marine scientists say that a tenth of the world’s reef systems have been destroyed in recent times. At current rates of loss, almost three-quarters of the reefs could be gone in 30 years. A particular lab studies corals and the diseases that affect them. Dr. Drew Harvell and his lab sampled sea fans at 19 randomly selected reefs along the Yucatan peninsula and diagnosed whether the animals (the sea fans) were affected by aspergillosis1 . In specimens collected at a depth of 40 feet at the Las Redes Reef in Akumal, Mexico, scientists found that 52% of the 104 sampled sea fans were infected with aspergillosis. (a) What are the mean (proportion, p) and standard deviation of the sampling distribution of the sample proportion (mean (p) and sepˆ) of infected sea fans? What should the distribution look like (think of the definition of CLT)? (b) What is probability that the sample proportion of infected sea fans is less than 50% (that is find P(ˆp < .5))? (c) What is probability that the sample proportion of infected sea fans is between 40 and 60%?
General
4 months ago
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