coldcrafteffects
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
coldcrafteffects
coldcrafteffects
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
General
The monthly expenditures on food by single adults living in one neighborhood of Los Angeles are normally distributed with a mean of $410 and a standard deviation of $75. Determine the percentage of samples of size 9 that have mean expenditures within $20 of the population mean expenditure of $410.
General
3 months ago
The correct way to use a seat belt isA. across your hips, and across your body over the collar boneB. cross your thighs, over the body, and over the collar boneC. across your waist, over the body, and around the collar boneD. across your hips, and across your body, around your neckDefined Stem (District)
General
3 months ago
There is only one checkout line and the average service time is 5 minutes per customer. There are 3 people in the queue ahead of you. What is the probability that your wait time will exceed 7 minutes?
General
3 months ago
The weekly amount of money spent on maintenance and repairs by a company was observed, over a long period of time, to be approximately normally distributed with mean $430 and standard deviation $10. How much should be budgeted for weekly repairs and maintenance so that the probability the budgeted amount will be exceeded in a given week is only 0.05? (Round your answer to the nearest cent.)
General
3 months ago
An insurance company offers its policyholders a number of different premium payment options. For a randomly selected policyholder, let X = the number of months between successive payments. The cdf of X is as follows: F(x) =0 - x < 10.33 - 1 < x < 30.44 - 3 < x < 40.48 - 4 < x < 60.86 - 6 < x < 121 - 12 < xa. What is the pmf of X? x 1 3 4 6 12p(x)b. Using just the cdf, compute P(3 ≤ X ≤ 6) and P(4 ≤ X).P(3 < X < 6) =P(4 < X) =
General
3 months ago
An article presents a new method for timing traffic signals in heavily traveled intersections. The effectiveness of the new method was evaluated in a simulation study. In 50 simulations, the mean improvement in traffic flow in a particular intersection was 653.5 vehicles per hour, with a standard deviation of 311.7 vehicles per hour. A traffic engineer states that the mean improvement is between 581 and 726 vehicles per hour. With what level of confidence can this statement be made? Express the answer as a percent and round to the nearest integer.The level of confidence is what % ?
General
3 months ago
A coin is flipped eight times where each flip comes up either heads or tails. How many possible outcomes a) are there in total? b) contain exactly three heads? c) contain at least three heads? d) contain the same number of heads and tails? Rosen, Kenneth. Discrete Mathematics and Its Applications (p. 435). McGraw-Hill Higher Education. Kindle Edition.
General
3 months ago
A website tracks advanced exam registrations and performance by high school students. In a recent year, of the students who took the microeconomics exam, 44 % passed. In an attempt to determine if the proportion of those passing the advanced math and science exams is equal to the 44% success rate for microeconomics, a random sample of 250 students enrolled in advanced math and science classes has been selected. Complete parts a and b below. a. If 26 of the students in the sample passed at least one advanced math or science exam, calculate the proportion of those students who passed at least one math or science exam. Does this statistic indicate that the proportion of students who passed at least one advanced math or science exam is less than the 44% success rate for microeconomics? Support your assertion. The proportion of those students who passed at least one math or science exam is (Round to three decimal places as needed.) Does this statistic indicate that the proportion of students who passed at least one advanced math or science exam is less than the 44% success rate for microeconomics? Support your assertion. O A. No, because the sample proportion is less than 0.44. O B. Yes, because the sample proportion is less than 0.44. O C. No, because the sample proportion is greater than 0.44 O D. Yes, because the sample proportion is greater than 0.44. b. Calculate a 99% confidence interval for the proportion of those students who passed at least one advanced math or science exam. The 99% confidence interval estimate is (Round to three decimal places as needed. Use ascending order.)
General
3 months ago
When the light turns yellow, should you stop or go through it? The article "Evaluation of Driver Behavior in Type II Dilemma Zones at High-Speed Signalized Intersections" (D. Hurwitz, M. Knodler, and B. Nyquist, Journal of Transportation Engineering, 2011:277-286) defines the "indecision zone" as the period when a vehicle is between 2.5 and 5.5 seconds away from an intersection. At the intersection of Route 7 and North Shrewsbury in Clarendon, Vermont, 154 vehicles were observed to encounter a yellow light in the indecision zone, and 21 of them ran the red light. At the intersection of Route 62 and Paine Turnpike in Berlin, Vermont, 183 vehicles entered the intersection in the indecision zone, and 20 ran the red light. Can you conclude that the proportion of redlight runners differs between the two intersections?
General
3 months ago
The total output of the chair industry is 2,000 chairs per month. If firms A, B, C, and D are the four largest firms in the industry, calculate the four-firm concentration ratio for the chair industry by finding out what percentage of the total output the four firms are responsible for. Round your answer to the nearest whole percent.
General
3 months ago
A publisher claims that the average salary paid at its company is $37,500 but it could differ as much as $4,500. Write and solve an absolute value inequality to determine the range of salaries at this company. (2 points)
General
3 months ago
ABC is reflected across the x-axis and then translated 4 units up to create A' B' C'. What are the coordinates of the verticles of A' B' C' ?
General
3 months ago
Please help me solve this. Solve the given equation in the interval [0,2 π]. Note: The answer must be written as a multiple of π. Give exact answers. Do not use decimal numbers. The answer must be an integer or a fraction. Note that π is already provided with the answer so you just have to find the appropriate multiple. E.g. if the answer is π2 you should enter 1/2. If there is more than one answer write them separated by commas.2(sinx)^2−5cosx+1=0
General
3 months ago
What steps would you take to choose and research careers? Which factors would you consider when making your choice? Describe your process as clearly as you can using vocabulary terms from the lesson. Write four or five sentences.
General
3 months ago
What is the slope of the line through (1,0) (3,8)
General
3 months ago
A circle of radius 8 is centered at the point (−9,10). Find a formula for f(q), the x-coordinate of the point, where q denotes the angle.
General
3 months ago
5p coins weigh approximately 3 grams.What would be weight of £5 worth of 5p coins? give your answer in kg
General
3 months ago
A vehicle uses 1 1/8 gallons of gasoline to travel 13 1/2 miles. At this rate how many miles can the vehicle travel per gallon of gasoline
General
3 months ago
Calculate the volume of the composite solid.A.) 175.1B.) 191.1C.) 255.1D.) 355.1
General
3 months ago
Mason took out an $800 loan from the bank. At the end of 5 years, he pays back the principal, plus $120 simple interest. What was the interest rate? PLZ HELP ME
General
3 months ago
Previous
1
2
3
Next