Mathematics, 13.07.2019 12:10 jdiel14
Asupermarket is testing brands of microwave popcorn. for each brand, they recorded the percentage of corn kernels in a package that popped in the recommended cooking time. let a be the data set of percentages listed below.
a = {91, 94, 89, 93, 87, 92, 86, 87, 92, 91}
the supermarket then realized they missed a brand. when the new brand was cooked, only 74% of its kernels popped.
let b be the data set of percentages for all 11 packages, including the package where the least kernels popped.
select the statements that are true.
the mean of a is the same as the mean of b.
the interquartile range of a is the same as the interquartile range of b.
including the percentage for the package where the least kernels popped causes the spread of the data to decrease.
the standard deviation of b is greater than the standard deviation of a.
the median of a is the same as the median of b.
including the percentage for the package where the least kernels popped causes the center of the data to increase.
Answers: 3
Mathematics, 21.06.2019 19:40
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
Answers: 3
Mathematics, 21.06.2019 21:00
Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)
Answers: 1
Mathematics, 21.06.2019 23:30
If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?
Answers: 2
Asupermarket is testing brands of microwave popcorn. for each brand, they recorded the percentage of...
Mathematics, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00
Biology, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00
Social Studies, 19.01.2021 18:00
Advanced Placement (AP), 19.01.2021 18:00
English, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00
Biology, 19.01.2021 18:00
Mathematics, 19.01.2021 18:00