Mathematics, 26.02.2020 16:55 miguel454545
Answer key A certain brand of car is rated to get 35 miles per gallon on the highway. A researcher believes the claim is faulty – that is too high. His company drives a random sample of 40 cars in identical highway conditions for a total of 500 miles and checks the fuel economy. He finds that the average rating for the cars is 32.54 miles per gallon. Using a population standard deviation of 1.3mpg, determine if there is evidence at the 2% level that the company’s claim of 35 mpg is too high. Also, find a 98% confidence interval for the average mileage rating of this car and interpret the answer.
Answers: 3
Mathematics, 21.06.2019 13:10
Anthony is making a collage for his art class my picking shapes randomly. he has five squares, two triangles, two ovals, and four circles. find p( circle is chosen first)
Answers: 1
Mathematics, 21.06.2019 18:30
At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.
Answers: 2
Mathematics, 22.06.2019 00:30
What is the value of the discrimination for the quadratic equation 0=×2+2+×2
Answers: 2
Answer key A certain brand of car is rated to get 35 miles per gallon on the highway. A researcher b...
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