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Math 1280 Final Exam Questions With Correct Answers.

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Institution Math 1280
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Math 1280 Final Exam Questions With Correct Answers.

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Math 1280 Final Exam Questions With
Correct Answers
Using |the |value |of |x |from |the |prior |question, |what |is |the |SD |of |x? |- |CORRECT |ANSWER✔✔-
1.94



What |is |the |probably |that |a |randomly |selected |item |from |random |variable |L |will |be |greater |
than |0 |and |less |than |or |equal |to |3? |- |CORRECT |ANSWER✔✔-.57



What |is |the |expectation |of |random |variable |L? |- |CORRECT |ANSWER✔✔-1.60



What |is |the |variance |of |random |variable |L? |- |CORRECT |ANSWER✔✔-14.58



Which |distributions |are |discrete? |- |CORRECT |ANSWER✔✔-Poisson, |Binomial, |Uniform



What |is |the |expected |number |of |successes |when |throwing |5 |darts? |- |CORRECT |ANSWER✔✔-
0.75



What |is |the |probability |of |getting |4 |or |more |successes |in |5 |throws? |- |CORRECT |
ANSWER✔✔-.00



A |Poisson |distribution |called |Q |has |an |expectation |of |4. |Which |of |the |following |R |commands |
would |tell |you |the |probability |that |a |randomly |selected |value |from |Q |is |less |than |6 |and |
greater |than |or |equal |to |4? |- |CORRECT |ANSWER✔✔-ppois(5,4) |- |ppois(3,4)



At |a |small |store, |a |customer |enters |the |front |door |on |average |every |8 |minutes. |A |prior |study |
indicated |that |the |time |between |customers |entering |the |front |door |during |weekdays |follows |
an |exponential |distribution. |What |is |the |probability |that |the |time |between |customers |entering
|the |store |on |a |weekday |will |be |less |than |or |equal |to |7? |- |CORRECT |ANSWER✔✔-.58

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