continuous uniform distribution

ch06

Student:

1. A consistent wild shifting is characterized by uncounboard prizes and can conduct on any prize among an interspace.

True False

2. We are frequently animated in opinion the verisimilitude that a consistent wild shifting assumes a feature prize.

True False

3. The verisimilitude inobservance administration of a consistent wild shifting can be present as a copy of the verisimilitude magnitude administration of a discrete wild shifting.

True False

4. Cumulative dispensation administrations can merely be used to scold probabilities for consistent wild shiftings.

True False

5. The consistent regular dispensation represents a wild shifting, defined on the interspace [a, b], that has an resembling likely wild of turgid prizes among any subinterspace of [a, b] delay the identical diffusiveness.

True False

6. The verisimilitude inobservance administration of a consistent regular dispensation is definitive for all prizes betwixt - and +.

True False

7. The balance of a consistent regular dispensation is merely the middle of the better and inferior limits of the interspace on which the dispensation is defined.

True False

8. The balance and test derangement of the consistent regular dispensation are resembling. Gentleman False

9. The verisimilitude inobservance administration of a ordinary dispensation is in unconcealed characterized by nature symmetric and bell-shaped.

True False

10. Examples of wild shiftings that closely ensue a ordinary dispensation inferiorstand the age and the tabulate year appellation of a seed-plot ward.

True False

11. Ardent that the verisimilitude dispensation is ordinary, it is altogether descriptive by its balance μ > 0 and its test derangement σ > 0.

True False

12. Just as in the subject of the consistent regular dispensation, the verisimilitude inobservance administration of the ordinary dispensation may be abundantly used to scold probabilities.

True False

13. The test ordinary dispensation is a ordinary dispensation delay a balance resembling to naught and a test derangement resembling to one.

True False

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14. The epistle Z is used to indicate a wild shifting delay any ordinary dispensation. Gentleman False

15. The test ordinary board is as-well referred to as the z board. Gentleman False

16. Which of the ensueing is improve?

A. A consistent wild shifting has a verisimilitude inobservance administration but not a cumulative dispensation administration.

B. A discrete wild shifting has a verisimilitude magnitude administration but not a cumulative dispensation administration. C.A consistent wild shifting has a verisimilitude magnitude administration, and a discrete wild shifting has a

verisimilitude inobservance administration.

D.A consistent wild shifting has a verisimilitude inobservance administration, and a discrete wild shifting has a verisimilitude magnitude administration.

17. Which of the ensueing does not illustrate a consistent wild shifting?

A. Climax of oak trees in a ring.

B. Heights and weights of newborn babies.

C. Period of a disappearance betwixt Chicago and New York.

D. The number of customer arrivals to a bank betwixt 10 am and 11 am.

18. Which of the ensueing is not a speciality of a verisimilitude inobservance administration f(x)?

A. f(x) 0 for all prizes of x.

B. f(x) is symmetric encircling the balance.

C. The area inferior f(x) balance all prizes of x resemblings one.

D. f(x) befits naught or approaches naught if x increases to +eternity or decreases to -infinity.

19. The cumulative dispensation administration is indicated and defined as which of the ensueing?

A. f(x) and f(x) = P(X x)

B. f(x) and f(x) = P(X x )

C. F(x) and F(x) = P(X x)

D. F(x) and F(x) = P(X x)

20. The cumulative dispensation administration F(x) of a consistent wild shifting X delay the verisimilitude inobservance administration f(x) is which of the ensueing?

A. The area inferior f balance all prizes x

B. The area inferior f balance all prizes that are x or near

C. The area inferior f balance all prizes that are x or aggravate

D. The area inferior f balance all non-disclaiming prizes that are x or near

21. A consistent wild shifting has the regular dispensation on the interspace [a, b] if its verisimilitude inobservance

administration f(x) .

A. Is symmetric encircling its balance

B. Is bell-shaped betwixt a and b

C. Is fixed for all x betwixt a and b, and 0 otherwise

D. Asymptotically approaches the x axis when x increases to + or decreases to -

22. The climax of the verisimilitude inobservance administration f(x) of the regular dispensation defined on the interspace [a, b]

is .

A. 1/(b - a) betwixt a and b, and naught otherwise

B. (b - a)/2 betwixt a and b, and naught otherwise

C. (a + b)/2 betwixt a and b, and naught otherwise

D. 1/(a + b) betwixt a and b, and naught otherwise

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23. The doubt period at an elevator is regularly nice betwixt 30 and 200 relieves. Discaggravate the balance and test derangement of the doubt period.

A. 115 relieves and 49.07 relieves

B. 1.15 searchings and 0.4907 searchings

C. 1.15 searchings and 24.08333 (minute)2

D. 115 relieves and 2408.3333 (second)2

24. The doubt period at an elevator is regularly nice betwixt 30 and 200 relieves. What is the verisimilitude a rider must abide betwixt 1 searching and 1.5 searchings?

A. 0.1765

B. 0.3529

C. 0.5294

D. 0.8824

25. The doubt period at an elevator is regularly nice betwixt 30 and 200 relieves. What is the verisimilitude a rider must abide aggravate than 1.5 searchings?

A. 0.3529

B. 0.4500

C. 0.5294

D. 0.6471

26. The doubt period at an elevator is regularly nice betwixt 30 and 200 relieves. What is the verisimilitude a rider abides near than two searchings?

A. 0.4706

B. 0.5294

C. 0.6000

D. 0.7059

27. The period of a circumvent to a technical assistance cord is regularly nice betwixt 2 and 10 searchings. What are the balance and antagonism of this dispensation?

A. 6 searchings and 2.3094 (minutes)2

B. 6 searchings and 5.3333 (minutes)2

C. 6 searchings and 5.3333 searchings

D. 8 searchings and 2.3094 searchings

28. An analyst is prospect net pay for Excellence Corporation for the instant fiscal year. Her low-end deem of net pay is $250,000, and her high-end deem is $350,000. Prior discovery allows her to

assume that net pay ensues a consistent regular dispensation. The verisimilitude that net pay obtain be

superior than or resembling to $337,500 is .

A. 12.5%

B. 29.6%

C. 87.5%

D. 96.4%

29. Alex is in a hasten to get to resultion and is dashing to lay-hold-on the bus. She comprehends that the bus arrives total six searchings during dash hour, but does not comprehend the fair periods the bus is due. She realizes that from the period she arrives at the bung, the totality of period that she obtain feel to abide ensues a regular dispensation delay a inferior skip of 0 searchings and an better skip of six searchings. What is the verisimilitude that she obtain feel to abide aggravate than two searchings?

A. 0.1667

B. 0.3333

C. 0.6667

D. 1.0000

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30. Suppose the middle compute of gasocord for a city in the United States ensues a consistent regular dispensation delay a inferior skip of $3.50 per gallon and an better skip of $3.80 per gallon. What is the verisimilitude a wildly separated gas position account aggravate than $3.70 per gallon?

A. 0.3000

B. 0.3333

C. 0.6667

D. 1.0000

31. How sundry parameters are demanded to abundantly represent any ordinary dispensation?

A. 1

B. 2

C. 3

D. 4

32. What does it balance when we say that the tails of the ordinary incurvation are asymptotic to the x axis?

A. The tails get closer and closer to the x axis but never affect it.

B. The tails gets closer and closer to the x axis and at-latest affect it.

C. The tails get closer and closer to the x axis and at-latest perverse this axis.

D. The tails get closer and closer to the x axis and at-latest befit this axis.

33. The verisimilitude that a ordinary wild shifting is near than its balance is .

A. 0.0

B. 0.5

C. 1.0

D. Cannot be determined

34. Let X be ordinaryly nice delay balance μ and test derangement σ > 0. Which of the ensueing is gentleman environing the z prize similar to a ardent x prize?

A. A definitive z = (x - μ)/σ indicates how sundry test derangements x is aggravate μ.

B. A disclaiming z = (x - μ)/σ indicates how sundry test derangements x is adown μ.

C. The z prize similar to x = μ is naught.

D. All of the aggravate.

35. It is comprehendn that the diffusiveness of a infallible result X is ordinaryly nice delay μ = 20 inches. How is the

verisimilitude akin to ?

A. is superior than .

B. is smaller than .

C. is the identical as .

D. No similitude can be made delay the ardent advice.

36. It is comprehendn that the diffusiveness of a infallible result X is ordinaryly nice delay μ = 20 inches. How is the

verisimilitude akin to ?

A. is superior than .

B. is smaller than .

C. is the identical as .

D. No similitude can be made delay the ardent advice.

37. It is comprehendn that the diffusiveness of a infallible result X is ordinaryly nice delay μ = 20 inches. How is the

verisimilitude akin to ?

A. is superior than .

B. is smaller than .

C. is the identical as .

D. No similitude can be made delay the ardent advice.

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38. It is comprehendn that the diffusiveness of a infallible result X is ordinaryly nice delay μ = 20 inches and σ = 4

inches. How is the verisimilitude akin to ?

A. is superior than .

B. is smaller than .

C. is the identical as .

D. No similitude can be made delay the ardent advice.

39. The verisimilitude P(Z < -1.28) is closest to .

A. -0.10

B. 0.10

C. 0.20

D. 0.90

40. The verisimilitude P(Z > 1.28) is closest to .

A. -0.10

B. 0.10

C. 0.20

D. 0.90

41. Discaggravate the verisimilitude P(-1.96 Z 0).

A. 0.0250

B. 0.0500

C. 0.4750

D. 0.5250

42. Discaggravate the verisimilitude P(-1.96 Z 1.96).

A. 0.0500

B. 0.9500

C. 0.9750

D. 1.9500

43. Discaggravate the z prize such that .

A. z = -1.33

B. z = 0.1814

C. z = 0.8186

D. z = 1.33

44. Discaggravate the z prize such that .

A. z = -1.645

B. z = -1.96

C. z = 1.645

D. z = 1.96

45. You resultion in marketing for a troop that produces resultion boots. Quality manage has sent you a memo detailing the diffusiveness of period antecedently the boots carry out inferior oppressive use. They discaggravate that the boots carry out in an middle of 208 days, but the fair totality of period varies, ensueing a ordinary dispensation delay a test derangement of 14 days. For an upcoming ad campaign, you demand to comprehend the percent of the pairs that latest longer than six monthsthat is, 180 days. Use the experimental government to near this percent.

A. 2.5%

B. 5%

C. 95%

D. 97.5%

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46. A hedge investment avail on middle 26% per year delay a test derangement of 12%. Using the experimental government, near the verisimilitude the investment avail balance 50% instant year.

A. 0.5%

B. 1%

C. 2.5%

D. 5%

47. For any ordinaryly nice wild shifting delay balance μ and test derangement σ, the percent of the

observations that lapse betwixt and is closest to .

A. 68%

B. 68.26%

C. 95%

D. 95.44%

48. For any ordinaryly nice wild shifting delay balance μ and test derangement σ, the adjustment of the

observations that lapse beyond the interspace [μ - σ, μ + σ] is closest to .

A. 0.0466

B. 0.3174

C. 0.8413

D. 0.1687

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