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MATH SOLVE
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In a simple linear regression model, the slope term is the change in the mean value of y associated with _____________ in x. A) a variable change B) a corresponding increase C) a one-unit increase D) no change
General
5 months ago
Suppose that textbook weights are normally distributed. You measure 28 textbooks' weights, and find they have a mean weight of 76 ounces. Assume the population standard deviation is 12.3 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places.
General
5 months ago
1 point) (Hypothetical.) The average salary of all residents of a city is thought to be about $39,000. A research team surveys a random sample of 200 residents; it happens that the average salary of these 200 is about $40,000 with a SD of $12,000. Make a z-test of the null hypothesis that this difference was just chance (in the sampling).
General
5 months ago
Which statements are true about the graph ofy< 2x + 1? Check all that apply.Graph: y < }x+1The slope of the line is 1.The line is solid.The area below the line is shaded.A solution to the inequality is (2.3).The x-intercept of the boundary line is (-3.0).DrawClick or tap the graph to plot a point
General
5 months ago
What is the length of AC ? Enter your answer in the box. units Triangle A B C with vertical side A C. Vertex B lies to the right of side A C. Angle A and angle C are marked congruent. The length of side A C is labeled as x. The length of side A B is labeled as x plus 4. The length of side B C is labeled as 3 x minus 8.
General
5 months ago
The following table list two investment plans, A and B. Given this information, determine which investment is an ordinary annuityand the future value of the ordinary annuity after one year, given that both investments, A and B, compound interest monthly atthe rate of 3.5%. Round to the nearest cent.Sept.oct.Nova.b.C.d.Jan Feb Mar Apr May Jun Jul Aug Sept.350 350 350 350 350 350 350 350 350 350 350350 350 350 350 350 350 350 350 350 350 350Investment A is an ordinary annuity with $3.918.03 in the account after 1 yearInvestment B is an ordinary annuity with $3,918.03 in the account after 1 yearInvestment A is an ordinary annuity with $3,906.64 in the account after 1 yearInvestment B is an ordinary annuity with $3,906.64 in the account after 1 year
General
5 months ago
line m contains the points -3,4 and 1,0. write the equation of a line that would be perpendicular to this one and pass through the point -2,6 How do you solve that
General
5 months ago
g SupposeXis a Gaussian random variable with mean 0 and varianceσ2X. SupposeN1is a Gaussian random variable with mean 0 and varianceσ21. SupposeN2is a Gaussianrandom variable with mean 0 and varianceσ22. AssumeX,N1,N2are all independentof each other. LetR1=X+N1R2=X+N2.(a) Find the mean ofR1andR2. That is findE[R1] andE[R2].(b) Find the correlationE[R1R2] betweenR1andR2.(c) Find the variance ofR1+R2.
General
5 months ago
supervisor records the repair cost for 25 randomly selected dryers. A sample mean of $93.36 and standard deviation of $19.95 are subsequently computed. Determine the 98% confidence interval for the mean repair cost for the dryers. Assume the population is approximately normal. Find the critical value that should be used in constructing the confidence interval.
General
5 months ago
Compute the line integral with respect to arc length of the function f(x, y, z) = xy2 along the parametrized curve that is the line segment from (1, 1, 1) to (2, 2, 2) followed by the line segment from (2, 2, 2) to (−9, 6, 5).
General
5 months ago
PLEASE HELP ME !!!, Emily has 1/2 yard of wrapping paper. She will use the same amount of wrapping paper to wrap 3 packages. How much wrapping paper, in yards, will Emily use for each package?
General
5 months ago
Ruth knows she has a 25% chance of having a child with blue eyes and a 75% chance of having a child with brown eyes. Ruth considers making a spinner to simulate the probability of having three children with blue eyes. Describe what the spinner should look like and the steps she should take to perform the simulation.
General
5 months ago
In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known to be approximately normal with a standard deviation of 12 beats per minute. What is the 99% confidence interval for the mean beats per minute? 68.9 − 76.3 70 − 72 61.2 − 72.8 68 − 72
General
5 months ago
Evaluate P = 50x + 80y at each vertex of the feasible region. (0, 0) P = (0, 15) P = (6, 12) P =
General
5 months ago
Can someone help me with some algebra?What is the oblique asymptote of the function f(x) = the quantity x squared plus 5x plus 6 over the quantity x minus 4? y = x + 9 y = x − 9 y = x + 1 y = x − 1thanks :)))
General
5 months ago
Victoria had $200 in her account at the end of one year. At the first of each subsequent year she deposits $15 into the account and earns 2% interest on the new balance. Which recursive formula represents the total amount of money in the bank?
General
5 months ago
Can you please explain how to write the ratios for sin x and cos x? When angles are x, y, and z. The hypotenuse being 12 and is between x and y. The other leg being x to z and 5. The last leg being z to y and sqrt 119.
General
5 months ago
Can someone help me with algebra?What is the least common denominator of the fraction 7 over 3 x plus the fraction 2 over x plus the fraction x over x minus 1? 3x − 1 3(x2 − 1) 3(x − 1) 3x(x − 1)thanks in advanced :))
General
5 months ago
what expression represents the following problem: A glass holds 1/ 4 liters of liquid. How many glasses of liquid are in 5 liters?
General
5 months ago
You plan to construct a brick wall measuring 15 ft. in length, 6 ft. high, and 1 ft. in width. If a brick measures 6 in. x 4 in. x 2 in., how many bricks will you need? (Remember to round up.) Total volume (to the nearest cubic inch) = cubic inches. The number of bricks = .
General
5 months ago
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