Step-by-Step Mathematics Tutorials for Easy Learning

what is the residue modulo $16$ of the sum of the modulo $16$ inverses of the first $8$ positive odd integers? express your answer as an integer from $0$ to $15$, inclusive.
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for a random sample of 85 such pairs, what is the (approximate) probability that the sample mean courtship time is between 95 min and 120 min? (round your answer to four decimal places.)
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In a survey sample of 1,000 respondents, the mean annual salary is $32,245, with a standard deviation of 4021.54. estimate the value of the standard error.
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five cards are drawn successively with replacement from a well shuffled pack of 52 cards. what is the probability that out of five cards 0, 1, 2,3,4,5 cards are diamond?
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Read the following statements I through V: I. Zero (0) II. One (1) III. Two (2) IV. Either Zero (0) or One (1) V. Neither Zero (0) nor One (1) What is the skewness of the normal distribution
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In a statistical inference method you'll draw a conclusion in the end - youll _______ something - about the characteristics of what you're comparing.
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Problem Frequency A. Topping is stuck to box lid B. Pizza arrives late C. Wrong topping or combination D. Wrong style of crust E. Wrong size F. Pizza is partially eaten G. Pizza never arrives
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This trapezoid-based right prism has a volume of 30\text{ cm}^330 cm 3 30, start text, space, c, m, end text, cubed.
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Given the system of equations presented here: 4x y = 4 2x 6y = 24 which action creates an equivalent system that will eliminate one variable when they are combined?
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meridians of identify degrees east and west of the . these lines are / are not (circle) scientifically based. why/why not?
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a bank pin is a string of four digits, each digit 0-9. how many choices are there for a pin if the last digit must be odd? a. 104 b. 410 c. 5 310 d. 5 103
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a study is being done to test the effects of habitat space on the size of fish populations. four aquariums of of the same size are set up with six goldfish in each one. over a period of six months, the fish are fed the same type and amount of food. the aquariums are equally maintained and cleaned throughout the experiment. the temperature of the water is kept different in each tank. at the end of the experiment the number of surviving fish are surveyed. what is the independent variable?
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one institute mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. a recent study of the accuracy of checkout scanners at the stores of a certain company showed that, of the company stores investigated, violated the institute's scanner accuracy standard. if 1 of the company stores is randomly selected, what is the probability that that store does not violate the institute scanner accuracy standard?
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triangle abc on a coordinate plane is dilated by a scale factor of to create triangle mno. what do you know about triangle abc and triangle mno?
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how many different lists containing each of the numbers 1, 4, 5, 8, 17, and 21 exactly once, and nothing else, are there in which every odd integer appears before any even integer?
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suppose that prices of a certain model of new homes are normally distributed with a mean of $150,000. use the 6 8-9 5-99.7 rule to find the percentage of buyers who paid:
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. if seven balanced dice are rolled, what is the probability that each of the six different numbers will appear at least once?
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if your study had an alpha value of 0.05 and a power of 80%, calculate the chance that you made a type ii error.
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determine the average cost for all courses. if the course cost contains a null value, substitute the value 0.
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Aubreys dad decides to check his luggage for his flight. The airlines are trying out a new fee structure where they charge a flat $40 for checked bags and then $. 50 per pound. Aubreys dad has bags that weigh a total of $60 pounds. How much will he have to pay?
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the weights of dormitory cockroaches follow a normal distribution with mean 80 grams and standard deviation 2 grams. about what percent of the cockroaches have weights between 76 grams and 84 grams?
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to ensure your safety while driving and from having your vehicle stolen, it is advised you always have your car doors locked. what percentage of stolen vehicles is attributed to having unlocked doors? 50 % 60 % 70% 80 %
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true or false: we can determine the p-value for a two-sided hypothesis test by dividing the one-sided p-value in half.
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what is the best point estimate for the population's variance if the sample standard deviation is 25.6? round your answer to one decimal place, if necessary.
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