Mathematics, 21.10.2020 17:01 heyyy6096
Car Fuel Economy – Each year a trio of government agencies publishes a fuel economy guide for all of the current model year of cars. For the current 2014 model year, the population mean highway fuel efficiency was 27.5 mpg, and the population standard deviation was 6.4 mpg. The underlying distribution for highway fuel efficiencies for the population of all 2014 model year cars is unimodal and skewed to the right. Suppose we take a sample of 50 current 2014 model cars and compute the sample mean. The central limit theorem tells us that the distribution for possible values of this sample mean is N(27.5, 0.905). What is the probability that the resulting sample mean highway fuel efficiency could be 30 mpg or higher?
Answers: 1
Mathematics, 21.06.2019 12:30
Which pair of angles are vertical angles? ∠1 and ∠4 ∠1 and ∠2 ∠2 and ∠4 ∠2 and ∠3
Answers: 2
Mathematics, 21.06.2019 17:00
Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?
Answers: 2
Mathematics, 21.06.2019 18:30
Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?
Answers: 2
Mathematics, 21.06.2019 23:00
The value of cos 30° is the same as which of the following?
Answers: 1
Car Fuel Economy – Each year a trio of government agencies publishes a fuel economy guide for all of...
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