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cricket20 [7]
3 years ago
9

The data modeled by the box plots represent the battery life of two different brands of batteries that Mary tested. A) What is t

he median value of each data set? B) Compare the median values of the data sets. What does this comparison tell you in terms of the situation the data represents? ( Answer A and B) Will Mark Brainliest if correct answer.​

Mathematics
2 answers:
zhannawk [14.2K]3 years ago
8 0

Answer:

Part A:

Median value for Brand X = 13

Median value for Brand Y = 16

Part B: Brand Y has a longer battery life

Step-by-step explanation:

Part A:

Median value is depicted on a box plot by the vertical line that divides the rectangular box. Therefore:

Median value for Brand X = 13

Median value for Brand Y = 16

Part B:

Brand Y has a higher median value (16) than Brand X (13).

This implies that brand Y has a battery life that last longer than brand X.

prisoha [69]3 years ago
8 0

Answer:

Brand X median: 13

Brand Y median: 16

Brand Y has a longer battery life than Brand X.

Step-by-step explanation:

This is what I submitted for the test.

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Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : n=45

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a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = \mu=148.79\text{ lb}

b) The confidence interval for the population mean is given by :-

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Formula for Margin of error :-

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Given : Significance level : \alpha=1-0.90=0.1

Critical value : z_{\alpha/2}=z_{0.05}=\pm1.645

Margin of error : E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69

Now, the 90% confidence interval for the population mean will be :-

148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)

Hence, the 90​% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

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