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MATH SOLVE
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The desired percentage of SiO2 in a certain type of aluminous cement is 5.5. To test whether the true average percentage is 5.5 for a particular production facility, 16 independently obtained samples are analyzed. Suppose that the percentage of SiO2 in a sample is normally distributed with σ = 0.32 and that x = 5.24. (Use α = 0.05.) (a) Does this indicate conclusively that the true average percentage differs from 5.5?State the appropriate null and alternative hypotheses.H0: μ = 5.5Ha: μ > 5.5H0: μ = 5.5Ha: μ ≥ 5.5 H0: μ = 5.5Ha: μ < 5.5H0: μ = 5.5Ha: μ ≠ 5.5
General
2 months ago
How many different functions are there from a set with 10 elements to sets with the following numbers of elements? a) 2 b) 3c) 4d) 5
General
2 months ago
Suppose that the mean value of interpupillary distance (the distance between the pupils of the left and right eyes) for adult males is 65 mm and that the population standard deviation is 5 mm. (a) If the distribution of interpupillary distance is normal and a random sample of n = 25 adult males is to be selected, what is the probability that the sample mean distance x for these 25 will be between 64 and 66 mm? (Round all your intermediate calculations to four decimal places. Round the answers to four decimal places.)
General
2 months ago
Suppose that the length, in inches, of a witch's or wizard's wand is a normal random variable with parameters mu = 11 and sigma^2 = 2. (a) What percentage of wands are over 12 inches? Leave you answer in terms of phi. (b) Given that a wand is greater than 12 inches, what is the probability it is greater than or equal to 15 inches? Leave you answer in terms of phi.
General
2 months ago
Most soybeans grown in the United States are genetically modified to, for example, resist pests and so reduce use of pesticides. Because some nations do not accept genetically modified (GM) foods, grain-handling facilities routinely test soybean shipments for the presence of GM beans. In a study of the accuracy of these tests, researchers submitted lots of soybeans containing GM beans to 21 randomly selected facilities. Of these, 17 detected the GM beans. Would it be appropriate to calculate a 90% confidence interval for the proportion of all grain-handling facilities that will correctly detect GM beans in a shipment?
General
2 months ago
Much like sound bites of news stories, statistical studies are often reduced to one- or two-sentence "stat-bites." For thestat-bite below, discuss what crucial information is missing and what more someone would want to know before acting on the study.According to a video streaming service, 48% of American couples are "cheaters", that is—they promise each other to watch a filmtogether, but one of them first watches it alone.Select all that apply.A. What do the other 52% of couples do?B. How were respondents persuaded to tell the truth?C. What did other video streaming service polls reveal?D. What kinds of films do "cheaters" watch?E. How do couples in other countries behave?
General
2 months ago
Mr. Jackson orders lunches to be delivered to his workplace for himself and somecoworkers. The cost of each lunch is $6.25. There is also a one-time delivery feeof $3.50 to deliver the lunches. What expression could Mr. Jackson use to findthe cost of ordering n lunches?Use your expression to find the total cost of delivering 5 lunches.Show your work.
General
2 months ago
Six students are working to simplify the expression shown.Drag each student's answer to a box to show whether it is fully simplified, equivalent tothe given expression but not fully simplified, or not equivalent to the given expression.
General
2 months ago
Help!Is the binomial a factor of the polynomial function? f(x)=2x^3+15x^2+22x-15.
General
2 months ago
(Riddle)An athlete is able to jump FOREVER. However, everytime that she jumps she gets a bit more tired, and every jump goes 12 as far as her prior jump. Now, for her very first jump, she goes 12 of a foot.On her second jump, she goes 14 of a foot, and so on and so forth. The beginning of her journey is shown in the gif below.How many jumps does it take for her to travel 1 foot?
General
2 months ago
Use the diagram of the right triangle above and round your answer to the nearest hundredth. If mAnswer choices: A) 17.32 m B) 6.83 m C) 14 m D) 9.99 m
General
2 months ago
Use Cavalieri’s Principle to calculate the exact volume of an oblique cylinder with a radius of 10 meters and a height of 11 meters
General
2 months ago
If a salesperson sells 3/4 of an acre for $80,000, what was the price per square foot rounded to two decimal spaces?
General
2 months ago
What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3
General
2 months ago
Choose the best description for the real number 34 over 3. Irrational, because it is a fraction Irrational, because it is a repeating decimal Rational, because it is a fraction Rational, because it is a terminating decimal
General
2 months ago
What is the sixth term in the binomial expression (5y+3)^10
General
2 months ago
WILL GIVE A BRAINLESTWhat is the value of [3.6]33.53.64
General
2 months ago
This is factoring trinomials,help plz!
General
2 months ago
Which ordered pair would form a proportional relationship with the point graphed below? mc012-1.jpg
General
2 months ago
The windows of a downtown office building are arranged so that each floor has six fewer windows than the floor below it. If the ground floor has 52 windows, how many total windows are on the first eight floors?
General
2 months ago
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