Mathematics, 28.05.2021 19:40 shermeka
A stereo manufacturer claims his top-of-the-line turntable has an average lifespan of more than 15 years. When asked to provide evidence
that supports this claim, he obtains from his files the names of 15 customers who have purchased this high quality turntable and asks each
how long their turntables ran before needing replacement. From these 15 measurements he computes and average lifespan of 17 years with a
variance of 4 years. The value of the test statistic (rounded off to two decimals) is:​
Answers: 3
Mathematics, 21.06.2019 16:20
The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.
Answers: 3
Mathematics, 21.06.2019 18:30
The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?
Answers: 3
Mathematics, 21.06.2019 22:00
Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.
Answers: 1
Mathematics, 22.06.2019 00:00
Which of the following will form the composite function?
Answers: 3
A stereo manufacturer claims his top-of-the-line turntable has an average lifespan of more than 15 y...
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