Calculus and Above

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1. Apply the Central Limit Theorem for Sample Means A
1. Apply the Central Limit Theorem for Sample Means A population of values has a normal distribution with μ = 209 and σ = 22. You intend to draw a random sample of size n = 35.Find the probability tha… read more
Kofi
Kofi
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Suppose x is a normally distributed random variable with
Suppose x is a normally distributed random variable with μ=8.9 and σ=2.7. Find each of the following probabilities:(a) P(11≤x≤15)= (b) P(6.7≤x≤15.5)= (c) P(7.6≤x≤15.9)= (d) P(x≥6.5)= (e) P(x≤14.9)=… read more
Neo
Neo
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Suppose x is a normally distributed random variable with
Suppose x is a normally distributed random variable with μ=10.4 and σ=3.2. Find each of the following probabilities:(a) P(6.1≤x≤14.8)= (b) P(7.4≤x≤14.3)= (c) P(7.2≤x≤15)= (d) P(x≥8.3)= (e) P(x≤15)=… read more
Tom
Tom
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A population of values has a normal distribution with μ =
A population of values has a normal distribution with μ = 223.7 and σ = 36.8 . You intend to draw a random sample of size n=20 .Find the probability that a single randomly selected value is greater th… read more
akch2002
akch2002
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Assume the random variable X is normally distributed with
Assume the random variable X is normally distributed with mean μ = 40 and standard deviation σ = 11. What is the probability P (X <52)?… read more
Sandhya
Sandhya
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1 point) The length, X, of a fish from a particular mountain
1 point) The length, X, of a fish from a particular mountain lake in Idaho is normally distributed with μ=8.7 inches and σ=1.7 inches.(a) Is X a discrete or continuous random variable? (Type: DISCRETE… read more
Sandhya
Sandhya
Master's Degree
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Stastics. In a class of 24 students, 9 of them have been to
In a class of 24 students, 9 of them have been to Sweden . Suppose you select 2 students at random ( one after the other, without replacem ent). Let x be the number of students in your sample of 2 students who have been to Sweden . 21) What's the probability that x = 0, that is, neither of the students has been to Sweden? a) 0.6250 b) 0.3804 c) 0.4891 d) 0.3750 22) What's the probabil ity that x = 2, that is, both of the students have been to Sweden? a) 0.75 b) 0.1406 c) d) 0.1304 23) What word best describes the variable x ? a) Discrete b) Continuous c) Total d) Normal … read more
Sandhya
Sandhya
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Suppose x has a distribution with μ = 18 and σ = 17. (a) If
Suppose x has a distribution with μ = 18 and σ = 17. (a) If a random sample of size n = 34 is drawn, find μx, σ x and P(18 ≤ x ≤ 20). (Round σx to two decimal places and the probability to four decima… read more
Kofi
Kofi
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I am preparing for a probability theory test and I am having
I am preparing for a probability theory test and I am having problems with MGF's these are some examples from previous exams which I would like solutions for along with explanations to help me study. … read more
Stevewh
Stevewh
Bachelor's Degree
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1. The cashier service time at the local branch of the Rivertown
1. The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes. What is the probability that the service time: Is between 2 and 4 minu… read more
akch2002
akch2002
Master's Degree
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Find the standardized variable Z if X has Mean 48 and standard
Find the standardized variable Z if X has Mean 48 and standard deviation 9. Your answer: Z = (X - ) / Open Show Work Find the standardized variable Z if X has Mean 157 and variance 36. Your answer: Z … read more
Stevewh
Stevewh
Bachelor's Degree
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Chapter 6 00. The average rent in a city is $1,570 per month
Chapter 6 00. The average rent in a city is $1,570 per month with a standard deviation of $200. Assume rent follows the normal distribution. Use the empirical rule to answer the following questions. a… read more
akch2002
akch2002
Master's Degree
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1. Let events An increase to A. Find A and show P(An ) -> P(A).
1. Let events An increase to A. Find A and show P(An ) -> P(A). Show the same thing in the decreasing case. Use these results to show that a df F is right continuous, F(oo)=1, F(-oo)=0. 2. Let X be… read more
Stevewh
Stevewh
Bachelor's Degree
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1) Given a binomial distribution with n = 29 and p = 0.83,
1) Given a binomial distribution with n = 29 and p = 0.83, would the normal distribution provide a reasonable approximation? Why or why not? 2) Find the value of z such that approximately 8.32% of the… read more
Math-John
Math-John
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1) A point is generated at random in the plane according to
1) A point is generated at random in the plane according to the following polar scheme. A radius R is chosen, where the distribution of R^2 is X^2 with 2 degrees of freedom. Independently, an angle θ … read more
Dr Arthur Rubin
Dr Arthur Rubin
Doctoral Degree
Doctoral Degree
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A statistics tutor has a coaching hour with a student once
A statistics tutor has a coaching hour with a student once a week. The number of times the student yawns during the hour is a random variable with probability distribution give in the table below Numb… read more
Sandhya
Sandhya
Master's Degree
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Helllo my question for Business statistics is The area under
Helllo my question for Business statistics is The area under the normal curve between z = 0 and z = 1 is ___ the area under the normal curve between z = 1 and z = 2 The choices are 1) less than 2) gre… read more
SusanAthena
SusanAthena
Master's Degree
Master's Degree
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The probability distribution table at the right is of the discrete
The probability distribution table at the right is of the discrete random variable x representing the number of patients waiting outside of a doctor's office. Answer the following: x P(X=x) (a) Determ… read more
Stevewh
Stevewh
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