Mathematics, 05.05.2020 16:39, 20068513
9. When 200 randomly selected car owners are surveyed, it is found that the mean length of time they plan to keep their car is 7.01 years, and the standard deviation is 3.47 years. Calculate the appropriate test statistic to test the claim that the mean for all car owners is less than 7.5 years.
Answers: 1
Mathematics, 21.06.2019 13:30, love0000
The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).
Answers: 1
Mathematics, 21.06.2019 18:10, heybrothwrlogan
Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180
Answers: 1
Mathematics, 21.06.2019 21:30, xaguilar
Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?
Answers: 2
Mathematics, 21.06.2019 23:00, youngaidan21
The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)
Answers: 1
9. When 200 randomly selected car owners are surveyed, it is found that the mean length of time they...
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