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Q: Please see picture

A: Solution:1.The expected value of X is obtained below:

Q: Number 19.

A: a)It is given that the population mean before treatment is given as 40, population mean after treatm...

Q: A survey asked buyers whether color, size, or brand influenced their choice of cell phone. How many ...

A: This problem involving 3 sets : Color, Size and Brandn(Color)=5n(Size)=8n(Brand)=16n(Color and Size)...

Q: How many different three-letter words (including nonsense words) can be formed such that the two let...

A: The permutation can be used to find the number of ways by which a set of objects can be arranged whe...

Q: The College Board National Office recently reported that in 2011-2012, the547,038 high school junior...

A: The given information is:

Q: in a sample of 855 bartenders, 48.0% report hearing complaints from patrons about their jobs. If the...

A: From the given information, the sample size (n) is 855. The sample proportion (p) is 48% that is p =...

Q: Please see picture

A: In this context, it is assumed that the n students are selected at random without replacement from a...

Q: How to find margin of error and 95% confidence interval?

A: Margin of error:The margin of error helps in constructing confidence intervals, which gives a range ...

Q: A population of values has a normal distribution with μ=72.4μ=72.4 and σ=48.8σ=48.8. You intend to d...

A: Given information:Mean, µ=72.4Standard deviation, σ=48.8Sample size, n=114