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g A random sample of 24 items is drawn from a population whose standard deviation is unknown. The sample mean is x⎯⎯ = 880 and the sample standard deviation is s = 5. Use Appendix D to find the values of Student’s t. (a) Construct an interval estimate of μ with 99% confidence. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (b) Construct an interval estimate of μ with 99% confidence, assuming that s = 10. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (c) Construct an interval estimate of μ with 99% confidence, assuming that s = 20. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (d) Describe how the confidence interval changes as s increases. The interval stays the same as s increases. The interval gets wider as s increases. The interval gets narrower as s increases.
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4 months ago
Conduct the Hypothesis Test:A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed. Use this data with a 0.05 significance level to test the claim that the fatality rate is higher for those not wearing seat belts.
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4 months ago
The area of this circle is 42 π m2. what is the area of a 60° sector of this circle. this is just to help people :)
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4 months ago
A quality control technician checked a sample of 30 bulbs. Two of the bulbs were defective. If the sample was representative, find the number of bulbs expected to be defective in a case of 450.a. 36b. 45c. 30d. 24
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4 months ago
A 70-foot wire attached to the top of a building is anchored to the ground 20 feet from the base of the building. Which value is the closest to the angle, in radians, that the wire makes with the ground? Help asap
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4 months ago
Use the given pair of functions to find and simplify expressions for the following functions and state the domain of each using interval notation.(g◦f)(x) (f ◦g)(x) (f ◦f)(x)f(x)= 3−x2, g(x)= (√x+1)
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4 months ago
A television camera is positioned 4000 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also, the mechanism for focusing the camera has to take into account the increasing distance from the camera to the rising rocket. Let’s assume the rocket rises vertically and its speed is 600 ft/s when it has risen 3000 ft. (a) How fast is the distance from the television camera to the rocket changing at that moment? (b) If the television camera is always kept aimed at the rocket, how fast is the camera’s angle of elevation changing at that same moment?
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4 months ago
A trucking firm suspects that the mean life of a certain tire. it uses is less than 33,000 miles. To check the claim, the firm randomly selects and tests 18 of these tires in gets a mean lifetime of 32, 450 miles with a standard deviation of 1200 miles. At α = 0.05, test the trucking firms claim.a. State Hypothesis and Identify Claim.b. Identify level of significance.c. Choose correct probability distribution, locate critical values.identify rejection region.d. Calculate test statistic.e. Make decisionf. Write conclusion.SHOW ALL YOUR WORK
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4 months ago
the Expression 4x^2-p(x)+7 leaves a remainder of -2 when divided by (x-3) find the value of pA) 11B)-2C)15D)40
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4 months ago
Which number line represents the solution to 2.5 – 1.2x < 6.5 – 3.2x?A number line from negative 5 to 5 in increments of 1. An open circle is at 4 and a bold line starts at 4 and is pointing to the left.A number line from negative 5 to 5 in increments of 1. An open circle is at 4 and a bold line starts at 4 and is pointing to the right.A number line from negative 5 to 5 in increments of 1. An open circle is at 2 and a bold line starts at 4 and is pointing to the left.A number line from negative 5 to 5 in increments of 1. An open circle is at 2 and a bold line starts at 4 and is pointing to the right.
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4 months ago
Simplify the expression. (p^9)^−2
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4 months ago
Hannah is saving money for a car. She earns $160 each week working part time after school and on the weekends at Papa's Pizza. Hannah currently has $1,280 in savings. Her parents put $50 in her savings account each week and she saves one-half of her paycheck each week. Which expression represents the situation? (n represents the number of weeks)
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4 months ago
Which of the following best describes the algebraic expression 5(x+2)-3? A. Three less than five times a number plus two B. Three less than five times the quantity of a number plus two
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4 months ago
Fifty students in the third-grade class listed their hair and eye colors in the table below: Brown hair Blonde hair Total Blue eyes 14 8 22 Brown eyes 16 12 28 30 20 50 Are the events "blonde hair" and "blue eyes" independent? A) Yes, P(blonde hair) • P(blue eyes) = P(blonde hair ∩ blue eyes) B) Yes, P(blonde hair) • P(blue eyes) ≠ P(blonde hair ∩ blue eyes) C) No, P(blonde hair) • P(blue eyes) = P(blonde hair ∩ blue eyes) D) No, P(blonde hair) • P(blue eyes) ≠ P(blonde hair ∩ blue eyes)
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4 months ago
Based on the graphic, which three-dimensional figure has the greatest volume?
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4 months ago
For which interval is the average rate of change of f(x) negative?
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4 months ago
If you take a certain number 2.5 times then add 1.75 and divide the result by 0.8, you’ll get 37.5. What was the original number?
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4 months ago
if c is the incenter of AMD, AMC=3x+6 AND dmc = 8X-49, FIND EACH MEASURE
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4 months ago
For the figures below, assume they are made of semicircles, quarter circles and squares. For each shape, find the area and perimeter. Give your answer as a completely simplified exact value in terms of π (no approximations).
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4 months ago
How many pounds of cashew nuts worth 75 cents a pound must be mixed with 10 pounds of pecans worth $1.50 a pound to make a mixture worth $1.00 a pound? Which of the equations could be used to solve for p, the pounds of cashew nuts? 75p + 150(10) = 100(p + 10) 75(p + 10) + 150(10) = 100(p + 10) 75p + 150 = 100(p + 10)
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4 months ago
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