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MATH SOLVE
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Which of the following regarding the power of a significance test is/are correct? Select all that apply.As the effect size increases, the power decreases.As the standard deviation increases, the power of the test increases.As the β, the probability of Type II error, increases (e.g., from 0.05 to 0.10), the power of the test increases.As the sample size increases, the power of a test increases.As the α, the significance level, increases (e.g., from 0.05 to 0.10), the power of the test decreases.As the standard deviation increases, the power of the test decreases.
General
3 months ago
The chocolate factory "Charlie’s own" produces limited-time boxes with exactly 9 chocolates. The research department of the factory models the weight of a chocolate by the random variable X, with expected value E(X) = 5 and variance Var(X) = 0.09. Customers who buy a box with chocolate weight less than 42.75 are reimbursed and given a coupon for their next purchase. Give an estimate of the percentage of boxes with weight less than 42.75. Leave your answer in terms of Φ, the distribution function of a standard normal random variable.
General
3 months ago
(1 point) An oscillating mass at the end of a spring is at a distance y from its equilibrium position given by y=????sin(????m‾‾‾√⋅????). The constant ???? measures the stiffness of the spring. Find the first positive time time ????1 at which the mass is farthest from its equilibrium position: ????1= Find the first positive time ????2 at which the mass is moving fastest: ????2= Find the first positive time ????3 at which the mass has the largest acceleration (in magnitude): ????3= What is the period, T, of the oscillation? T= Find ????T/????m: ????T????m= (What does the sign of ????T/????m tell you?)
General
3 months ago
An engineer wants to determine how the weight of a car, x, affects gas mileage, y. The following data represent the weights of various cars and their miles per gallon. Car A B C D E Weight (pounds), x 2555 2900 3330 3725 4100 Miles per Gallon, y 21.8 20.5 19 14.2 11.6 (a) Find the least-squares regression line treating weight as the explanatory variable and miles per gallon as the response variable. Write the equation for the least-squares regression line.
General
3 months ago
An economist says that the probability is .47 that a randomly selected adult is in favor of keeping the Social Security system as it is, .32 that this adult is in favor of totally abolishing the Social Security system, and .21 that this adult does not have any opinion or is in favor of other options. Were these probabilities obtained using the classical approach, relative frequency approach, or the subjective probability approach ? Explain your answer.
General
3 months ago
An inverted pyramid is being filled with water at a constant rate of 70 cubic centimeters per second. The pyramid, at the top, has the shape of a square with sides of length 7 cm, and the height is 10 cm. Find the rate at which the water level is rising when the water level is 4 cm.
General
3 months ago
As part of the quality-control program for a catalyst manufacturing line, the raw materials (alumina and a binder) are tested for purity. The process requires that the purity of the alumina be greater than 85%. A random sample from a recent shipment of alumina yielded the following results (in percent):93.2 87.0 92.1 90.1 87.3 93.6A hypothesis test will be done to determine whethe or not to accept the shipment. (a) State the appropriate null and alternate hypotheses.(b) Compute the P-value. (c) Should the shipment be accepted?Explain.
General
3 months ago
When an electric current passes through two resistors with resistance r and s, connected in parallel, the combined resistance, R, can be calculated from the equationImage for When an electric current passes through two resistors with resistance r and s, connected in parallel, the combwhere R, r , and s are positive. Assume that s is constant.Find dr/ DRIs R and increasing or decreasing function of r?(Enter increasing, decreasing, neither, or both (write both if there are values of r for which R is increasing, and other values for which it is decreasing; enter neither if this is a constant function.)
General
3 months ago
For a long-distance person-to-person telephone call, a telephone company charges $ 0.21 for the first minute, $ 0.17 for each additional minute, and a $ 1.59 service charge. If the cost of a call is $ 2.31 comma how long did the person talk?
General
3 months ago
Suppose that the sequence x0, x1, x2... is defined by x0 = 4, x1 = 0, and xk+2 = 3xk+1+4xk for k≥0. Find a general formula for xk. Be sure to include parentheses where necessary, e.g. to distinguish 1/(2k) from 1/2k
General
3 months ago
Talia gave her hairdresser a 20 percent tip, which amounted to $7. What was the price of the service before the tip?
General
3 months ago
Choose the correct simplification of the expression 6 times b all over a to the power of negative 9. a to the 9th power times b all over 6 6 times b all over a to the 9th power Already simplified 6a9b
General
3 months ago
In a salsa recipe, the number of tomatoes added is proportional to the amount of salt added. This graph shows the relationship.What is the unit rate for the number of tomatoes to the tsp of salt?
General
3 months ago
Given: p: 2x = 16 q: 3x – 4 = 20 Which is the converse of p → q?
General
3 months ago
BRAINLIESTTTTTTT1. A telephone company charges a fixed monthly rate plus a rate per minute of usage. The company charges $135 for 100 minutes of usage and $375 for 500 minutes of usage. An equation can be written to show the relationship between the total minutes used (x) and the total monthly charges (y). Which of the following best describes the steps to draw the graph of y against x? Draw a graph which joins the points (135, 100) and (375, 500) and has a slope = 0.6 Draw a graph which joins the points (100, 135) and (500, 375) and has a slope = 0.6 Draw a graph which joins the points (100, 135) and (500, 375) and has a slope = 1.67 Draw a graph which joins the points (135, 100) and (375, 500) and has a slope = 1.672. please answer my picture
General
3 months ago
What are the roots of the quadratic equation 0 = 2x^2 + 12x –14?2, 12, –14–7, 1–1, 71, 6, –7Can you explain what it is wanting or asking?
General
3 months ago
Mr. Itol's assistant takes twice as long to complete a computer task as Mr. Itol. If it takes both experts 6 hours to complete the task, how long will it take each of them to do the job alone? PLEASE HELP
General
3 months ago
The drama club is selling short-sleeved shirts for $5 each, and long-sleeved shirts for $10 each. They hope to sell all of the shirts they ordered, to earn a total of $1,750. After the first week of the fundraiser, they sold 1/3 of the short-sleeved shirts and 1/2of the long-sleeved shirts, for a total of 100 shirts.This system of equations models the situation. 5x + 10y = 1,7501/3x + 1/2y = 100Let x represent the number of short-sleeved shirts ordered and let y represent the number of long-sleeved shirts ordered.How many short-sleeved shirts were ordered?How many long-sleeved shirts were ordered?
General
3 months ago
a pet store has 30 animals. some are cats the rest are dogs. the cats cost $50 each. the dogs cost $100 each. if the total for all 30 animals is $1900, how many cats are there?
General
3 months ago
Auto insurance options offered by AA Auto Insurance are outlined in the table below. What monthly payment would you expect for an insurance policy through AA Auto Insurance with the following options? Bodily Injury: $25/50,000 Property Damage: $25,000 Collision: $250 deductible Comprehensive: $100 deductiblea.$43.23b.$46.10c.$54.85d.$64.44
General
3 months ago
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