Conditional Probability And Expectation

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Can you help me understand this Statistics question?

b) Company A produces devices of somewhat limited reliability. The devices occasionally crash, requiring a reboot. To make matters worse, each device they produce has a different crash rate. For a given device, the time until the next crash is distributed asY∼Exp(1/X), whereXis the expected crash time for the given device and is in turn i.i.d for each device with a known mean and varianceμ,σ2.Now let’s say we take one device made by this company and let it run until it has crashed 5 times.LetY1denote the time until the first crash andY5the time until the fifth crash. What is cov(Y1,Y5)?You may assume that rebooting the device after a crash takes no time.

c) Suppose you repeatedly cast a 6-sided die but stop as soon as you cast an odd number. Let S denote the sum of all the throws, excluding the final odd throw (for instance, if you roll an odd number on the first try, thenS= 0). What isE(S) and var(S)?Comm Watch Lalita Amos TED Talk 7 simple easy questions
I’m studying for my English class and need an explanation.

Watch the Lalita Amos TED Talk and answer the questions below. The first 2 links relate to material she alludes to in the speech, so it may help to watch them first.

Questions Lalita Amos raises and/or answers:

1. How does a single piece of information change our view of someone or when was a time that new information changed MY view of someone?

2. How do we step outside ourselves in order to listen?

3. What interferes with our listening? What is the nature of internal noise?

4. What is the effect of paraphrasing?

5. Can we be triggered in the same way by positive and negative interactions?

6. Can I think of examples of this from my own life or have I seen this in others?

7. Main Points (it helped me to think in terms of parts or sections of the speech):VI-Marketing Essay: assignment help online
I’m studying and need help with a Marketing question to help me learn.

Instructions

Supply Chain and Logistics Management

Watch the following video (just over 11 minutes) by clicking on the link below:

MacNeil/Lehrer Productions (Producer). (1999). Your computer, your way: Dell and the direct sales model [Video file]. Retrieved from https://libraryresources.columbiasouthern.edu/login?auth=CAS&url=http://fod.infobase.com/PortalPlaylists.aspx?wID=273866&xtid=10070

Click here to view a transcript of the video.

After viewing the video, answer questions 1 and 2, and select one question from questions 3 and 4 to answer.

1. Compare Dell’s supply chain and logistics innovations with the competitive responses from competitors such as the Apple Store and others.
2. Discuss the emerging supply chain and logistics management factors shown in the video that were already negatively affecting large computer chain stores.

Answer question 3 or 4 below:

3. Explain how these technology-driven factors were not enough to enable some businesses to survive the online competitive entrance into the market.
4. In what ways may market research have helped prevent these large technology businesses from failing?

Each of your three responses should be at least one page in length; therefore, with an introduction and conclusion included, your essay should be at least four pages in length. In addition to the video, your essay must reference at least one article of your choice from a business-related or news website; therefore, your essay should reference at least two sources. Your essay must be in APA format. All paraphrased and quoted material must have accompanying in-text citations and references. Title and reference pages do not count toward the minimum length requirement.

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