Mathematics, 04.08.2020 23:01 mlstogsdill05
An article in the November 1983 Consumer Reports compared various types of batteries. The average lifetimes of Duracell Alkaline AA batteries and Eveready Energizer Alkaline AA batteries were given as 4.1 hours and 4.5 hours, respectively. Suppose these are the population average lifetimes. a. Let X be the sample average lifetime of 100 Duracell batteries and Y be the sample average lifetime of 100 Eveready batteries. What is the mean value of X ā Y (i. e., where is the distribution of X ā Y centered)? How does your answer depend on the specified sample sizes? b. Suppose the population standard deviations of lifetime are 1.8 hours for Duracell batteries and 2.0 hours for Eveready batteries. With the sample sizes given in part (a), what is the variance of the statistic X ā Y , and what is its standard deviation? c. For the sample sizes given in part (a), draw a picture of the approximate distribution curve of X ā Y (include a measurement scale on the horizontal axis). Would the shape of the curve necessarily be the same for sample sizes of 10 batteries of each type? Explain
Answers: 3
Mathematics, 21.06.2019 18:30
The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude
Answers: 3
Mathematics, 21.06.2019 20:30
Steve had 48 chocolates but he decided to give 8 chocolats to each of his f coworkers. how many chocolates does steve have left
Answers: 1
Mathematics, 21.06.2019 21:30
Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?
Answers: 2
Mathematics, 22.06.2019 02:30
The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?
Answers: 1
An article in the November 1983 Consumer Reports compared various types of batteries. The average li...
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