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The coefficient of determination, r2, indicates?
a. The linear relationship between two variables
b. The slope of the line of best fit
c. How closely the data fit a defined curve
d. The sum of the residuals from each data point
Mathematics10 hours agoResiduals are:?
a. The horizontal deviations from the line of best fit to each data point
b. The perpendicular distances from the line of best fit to each data point
c. The vertical deviations from the line of best fit to each data point
d. The areas of the squares between the line of best fit and each data point
Mathematics10 hours agoMatch each of the following types of causal relationships with the most appropriate example from the list below. ?
_____ The population of certain species of animals decreases as logging in wilderness areas increases.
_____ The sales of sports cars increase as the school year comes to a close in June.
_____ The price of bread and canola oil both increase sharply after the prairies experience a drought during the growing season.
_____ Demand for consumer goods increases as the unemployment rate decreases.
a. Cause-and-effect relationship
b. Accidental relationship
c. Common-cause factor
d. Reverse cause-and-effect relationship
e. Presumed relationship
Homework Help10 hours agoA survey is conducted and shows a 66% approval rating with a margin of error of ± 2.5% based on a chosen confidence level of 99%. ?
Determine the approximate number of people that were surveyed.
1 AnswerPersonal Finance6 days agoThe life spans of a particular species of turtle are normally distributed with a mean of 180 years and a standard deviation of 40 years. ?
What is the probability that one of these turtles, selected at random, will live more than a century?
1 AnswerMathematics7 days agoThe accuracy of an automatic pitching machine is based on the off-line distance that a pitch is from a target at a distance of 30m. ?
The off-line distance is distributed normally with a mean of 0.0m and a standard deviation of 0.05m.
A machine will not meet safety standards and will be rejected if its off-line distance is greater than 0.15m. Determine what percentage of machines will be rejected.
1 AnswerMathematics7 days agoTom is testing the accuracy of resistors that have a labeled resistance of 13 ohms.?
He finds that the distribution of resistances is approximately normal with a mean resistance 15.08 and a standard deviation of 1.52
What is the probability of each of the following?a. A resistor selected randomly has a resistance less than or equal to 14 ohmsb. A resistor selected randomly has a resistance between 14.08 ohms and 16.08 ohmsc A resistor selected has a resistance of exactly 15.5 ohms
Mathematics7 days agoTom is testing the accuracy of resistors that have a labeled resistance of 15 (ohms).?
He finds that the distribution of resistances is approximately normal with a mean resistance 15.08 and a standard deviation of 1.52 .
What is the probability of each of the following?
a. A resistor selected randomly has a resistance less than or equal to 14 ohms
b. A resistor selected randomly has a resistance between 14.08 ohms and 16.08 ohms
c A resistor selected has a resistance of exactly 15.5 ohms
2 AnswersMathematics7 days ago0.052=1.960square root 0.2464/n Solve for n?
1 AnswerMathematics1 week agoA certain cross of rat will result in white-black in the ratio of 8:5.?
a) What is the probability that among 9 such offspring, 5 will be white? (accurate to 4 decimal places)
b) What is the expected number of black rats from part a)?
Mathematics2 weeks agoA box contains 4 white balls and 3 red balls. Three balls are drawn from the box without replacement. What is the probability of drawing:?
a) 3 white balls?
b) 3 red balls?
c) 2 white balls?
d) What is the expected number red balls?
e) What is the expected number of white balls?
1 AnswerMathematics2 weeks agoAt a highschool the failure rate is 0.2 per year. Of 15 students registered in the freshman class, what is the probability?
a) that they all pass?
b) that at least 12 of them pass?
c) that exactly 12 of them pass?
2 AnswersMathematics2 weeks agoAccording to the theory of genetics, a certain cross of rat will result in white-black in the ratio of 8:5.?
a) What is the probability that among 9 such offspring, 5 will be white? (accurate to 4 decimal places)
b) What is the expected number of black rats from part a)?
Biology2 weeks agoAccording to the theory of genetics, a certain cross of rat will result in white-black in the ratio of 8:5.?
a) What is the probability that among 9 such offspring, 5 will be white? (accurate to 4 decimal places)
b) What is the expected number of black rats from part a)?
Biology2 weeks ago