A noted psychic was tested for ESP. The psychic was presented with 200 cards face down and was asked to determine if the card was one of 5 symbols: a star, cross, circle, square, or three wavy lines. The psychic was correct in 49 cases. Let pp represent the probability that the psychic correctly identifies the symbol on the card in a random trial. Assume the 200 trials can be treated as an SRS from the population of all guesses. To see if there is evidence that the psychic is doing better than just guessing, we testH0:p=.2H0:p=.2Ha:p>.2Ha:p>.2(a) What is the zz-statistic for this test? (b) What is the P-value of the test?

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general 9 months ago 7812

PLEASE PLEASE HELP ME!!!!!! DO NOT DO IT FOR POINTS! I GENUINELY NEED HELP! 1. Rewrite each expression by combining like terms. 8 p q − 3 p q and 2 m − 3 m + 42. A carnival costs $10.50 to enter plus an additional $3.50 per ticket for rides and food.Write an algebraic expression to represent the total cost for a visit to the carnival. Let n represent the number of tickets purchased.​​What is the total cost to visit the fair if you purchase 20 tickets? Explain your reasoning.3. Which expression is equivalent to 8−4(x−6)/4?A. x+32B. −x+8C.−4x−8D. x−7/2THERE WILL BE TOMORROW!!THANK YOU SO SO SO MUCH!!

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general 9 months ago 6532

1) In a comprehensive road test on all new car models, one variable measured is the time it takes a car to accelerate from 0 to 60 miles per hour. To model acceleration time, a regression analysis is conducted on a random sample of 129 new cars. Given: R^2= 0.6960 Approximately what percentage of the sample variation in acceleration time can be explained by the simple linear model? (Points : 1) 8% -17% 0% 70%2)The coefficient of correlation between x and y is r = 0.59. Calculate the coefficient of determination R^2

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general 9 months ago 6938

Your firm has a new strategy that will make its established product obsolete. However, it will take a year before you are ready to implement the new strategy. If you announce your plan in advance, profits will disappear because many customers and intermediaries will delay purchases until the new product is released. If you don’t announce the new plan, customers and intermediaries will continue to buy the establish product as their needs dictate, and some will be stuck owning the old product and may not do business with you again.

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general 9 months ago 8746

Delaney would like to make a 10 lb nut mixture that is 60% peanuts and and 40% almonds. She has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds. Let p represent the number of pounds of peanuts needed to make the new mixture, and let m represent the number of pounds of the 80% almond-20% peanut mixture.(a) What is the system that models this solution?(b) Which of the following is a solution to the system: 4 lb peanuts and 6 lb mixture; 5 lb peanuts and 5 lb mixture; 8 lb peanuts and 2 lb mixture? Show your work.

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general 9 months ago 9760