Step-by-Step Mathematics Tutorials for Easy Learning

find six distinct roots of unity which sum to zero but for which no nonempty proper subset sums to zero
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Determine which two points are opposites , using adsolute value be sure to show your work
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Was it possible for any of the kids in dr. vickers' sample (or anyone at all) to have the average number of feet?
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What two factors added up equal 6 what two factors timed with each other equals-7
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A car travels in a straight-line path. all displacements are listed relative to the car's starting point. at 2 seconds, the car is found at a position of 30 meters. at 6 seconds, the car is found at a position of 80 meters. at 13 seconds, the car is found at a position of 41 meters
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A random sample of 10 recent college graduates found that starting salaries for accountants in new york city had a mean of $47,589 and a standard deviation of $11,364. There are no outliers in the sample data set. Construct a 95% confidence interval for the average starting salary of all accountants in the city.
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numbers that describe diversity in a distribution are referred to as measures of group of answer choices central tendency. association. variability. standard deviation.
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g 6. what can you conclude based on the results of your test (hint: what does the p-value tell you?)? do you reject the null hypothesis, or fail to reject the null hypothesis? does the chis sample population have a statistically significant different average height than 68 inches tall?
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g the opening price of a particular stock is modeled as a continuous random variable that is uniformly distributed on the interval [35 3 4, 44 1 4]. what is the probability that, on any given day, the opening price is less than 40?
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in the context of the measures of reliability, correlating the total score of the first 20 questions on a test with the total score of the last 20 questions on a test is an example of
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a pair of standard -sided dice is rolled once. the sum of the numbers rolled determines the diameter of a circle. what is the probability that the numerical value of the area of the circle is less than the numerical value of the circle's circumference?
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which primal constraints are active at dual optimal solution when primal constraints are inequalities
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if the victim has a definite pulse but no normal breathing, how often should rescue breaths be given? once every 1 to 3 seconds once every 1 to 3 seconds once every 2 to 3 seconds once every 2 to 3 seconds once every 5 to 10 seconds once every 5 to 10 seconds once every 20 seconds, after compressions once every 20 seconds, after compressions read question
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a newsletter publisher believes that 63c% of their readers own a personal computer. is there sufficient evidence at the 0.100.10 level to refute the publisher's claim? state the null and alternative hypotheses for the above scenario.
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Place the two large triangles around the square to form a triangle, a parallelogram, and a trapezoid.
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How many possible ways are there to pick 5 basketball players out of a 25 player team?
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Tammy said the product of 5/7 and 1 1/4 is 1 3/4. how can you tell that this answer is wrong?
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Sean says that to add a number to -100 and still have is to add zero candice says she can add two numbers to -100 and still have -100
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Erica brought $30.25 to the state fair. she bought a burger, a souvenir, and a pass. the burger was 1 6 as much as the souvenir, and the souvenir cost 3 4 the cost of the pass. erica had $4.00 left over after buying these items. what was the cost of each item?
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A shop is selling four bars of soap for $10 how much will it cost for 12 bars of soap
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A large number of insurance records are to be examined to develop a model for predicting fraudulent claims. of the claims in the historical database, 1% was judged to be fraudulent (class 1).a sample database is taken to develop a model, and oversampling is used to provide a balanced sample in light of the very low response rate. when applied to this sample database (total number of records, n = 800), the model ends up correctly classifying 310 frauds, and 270 non-frauds. it misses 90 frauds and classified 130 records incorrectly as frauds when they were not.if the positive sample number is fixed (400), the sample ratio is 1:99 (fraudulent vs. non-fraudulent, positive vs. negative)1. what is the adjusted misclassification rate (error rate) that should be in the original non-oversampled database?2. what is the total number of false positive records that should be in the original non-oversampled database?
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If $42,000 is in sales and the commission is 2% how much does that person earn in a week
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How many sewing machines would be needed if operations ran two 8-hour shifts per day, 5 days per week? (Round answer to nearest whole numbers, e.g. 15.)
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The second number is 2 less than the first number and the 3rd number is 1 less than the 4th number.
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