A biology researcher is studying the risk of extinction of a rare tree species in a remote part of the Amazon. In the course of her study, the researcher models the trees' ages using a normal distribution with a mean of 254 years and a standard deviation of 75 years. Use this table or the ALEKS calculator to find the percentage of trees with an age between 347 years and 395 years according to the model. For your intermediate computations, use four or more decimal places. Give your final answer to two decimal places (for example 98.23%).

Q: Given that X is a binomial random variable with n 20 and p -0.75, find the following probabilities: ...

A:

Q: 92. How many three-digit numbers, each less than 500, can be formed from the digits 1, 3, 4, 6, and ...

A: Given digits is1,3,4,6,7 3 ways to fill it  (i.e 1,3, or 4) 4 ways to fill it 3 ways to fill it  ...

Q: Problem : If the Cumulative Distribution Function of X is given as: 2. F(x) K 3K 5K 8K K2 +8K ЗК2 + ...

A: Required probability is P(X>1)

Q: 2) Stephen says that he is not bald. His hairline is just receding. Is he committing an error? If so...

A: Given that  Maria insists that she is 30 years old when, in fact, she is 32 years old. What error is...

Q: The annual rainfall in a certain region is modeled using the normal distribution shown below. The me...

A: Empirical rule: The probability of the observation lies within 1 standard deviation of the mean, un...

Q: D. Solve the following problems. 1. If the scores for the test have a mean of 100 and a standard dev...

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Q: we want to guarantee that each of the three children gets at least 50 dollars. How many ways could w...

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Q: On a given day, 6% of the local population has the flu. If a person has the flu and takes a flu test...

A:

Q: A stockist has 20 items in a lot. Out of which 12 are non-defective and 8 are defective. A customer ...

A: Solution is given: hope the answer is helpful.

Q: Complete the table and answer the question. a. What is mean of the probability distribution? b. What...

A:

Q: Solve for the probability of each event. Write your answers as a reduced fraction. Twenty-five ball...

A:

Q: A senior inspector will inspect 10 rooms this week. (d) To have a fair representation, how many sea-...

A:

Q: outcomes of a soccer match are win, lose, or tie. What is the possible number of outcomes for the se...

A: here given , 3 matches are remaining

Q: 19. If two dice are rolled one time, find the probability of getting these results. a. P(sum of 6)%3...

A: As per bartleby guideline expert have to answer first three subparts only dear student please upload...

Q: If the Event A must occur with certainty, then the probability of this event is in * .(between O and...

A:

Q: a. At Portland Community College in 2019, there are 23 full-time math teachers who identify as male,...

A: As per guidelines expert have to answer first question only dear student please upload other questio...

Q: 1. A six-face die which contains numbers of dots from 1 to 6 is rolled once. Find the probability of...

A: if a die is rolled than the possible outcomes areS=1,2,3,4,5,6

Q: A bag contains 7 white and 9 black balls. The balls are drawn in succession at random, what is the p...

A:  

Q: A developer of a new subdivision wants to build homes that are all different. There are five differe...

A: Given, no.of interior plans=5no.of exteriors plans=7 

Q: 15. A box contains five green balls, three black balls and seven red balls. Two balls are selected a...

A: Here both question are without replacement model so use hypergeometric distribution

Q: ESA Dealers, Inc. is contemplating on how many units of cars to order to meet the customer demands f...

A: question:

Q: You enter a chess tournament where you probability of win- ning a game is 0.3 against half the playe...

A:

Q: Run a regression analysis on the following data set with y as the response variable. y 76 49.6 81.8 ...

A: Given

Q: 1. A point is chowen at random inside a circle if radius 2. What is the probability that the point i...

A:

Q: "SmartB" owns a phone battery assembly line which provide phone battery to a mobile company. It is k...

A: Given that , 4% of the batteries produced by "SmartB" are defective.  i.e. p=4% = 0.04 And random sa...

Q: Q10/ At room temperature (300 K) with the Fermi level located exactly in the middle of the bandgap, ...

A:

Q: - Find a 95% confidence interval for p1 - p2.

A: Here use confidence interval of difference of proportion 

Q: 12. A supplier delivers an order for 20 electric toothbrushes to a store. By accident, three of the ...

A:

Q: (c) At a political rally, there are 20 republicans, 13 democrats and 6 independents. If a person is ...

A:

Q: (a) Find EY and Var Y. (b) Find the joint distribution of X and Y. (c) Find the marginal distributio...

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Q: Let X1 and X2 have the joint pdf f(x1,x2) = 8x1x2, 0 < x1 < x2 < 1, zero elsewhere. Find the joint, ...

A:

Q: Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to d...

A: The random variable X follows normal distribution. It is given that, the probability mass function o...

Q: Problem 16: Four cards are drawn together from a deck of 52 cards. Find the probability that all are...

A: Given that, Four cards are drawn together from a deck of 52 cards. We need to find the probability t...

Q: An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X...

A: For the given data Find the given ( a ) and (b )

Q: 5. ISE has installed a new air purifying system in all 25 lecture rooms, one per room. Suppose 2 of ...

A: Given information: μGood=5λGood=15=0.20μDefective=1λDefective=11=1.0

Q: Three coins are tossed. Find the probability of getting at least two head

A: Given Three coins are tossed 

Q: What is the variance of the profit?

A: Here given, A contractor is considering a sale that promises a profit of ₱92 000 with a probability ...

Q: You have weighted nurse frequencies based on their speciality in a sample of nurse to match the nurs...

A: Weighted frequencies are required to compute the weighted mean.

Q: Customers at a petrol station pay with a credit card (4), debit card (B) or cash (C). Assume that su...

A: Solution: Given that: Customers a petrol station pay with a credit card (A), debit card (B) or cash ...

Q: If one scanner is taken from each box, what is the probability that the scanners from the first and ...

A: here A pharmacy buys one box each of 50 thermal scanners from four different companies. There are 8 ...

Q: A die is rolled three times. What is the chance that--- not all the rolls show 2 or more spots?

A: Here use binomial distribution because  Each trial is independent  Finite number of trial  There ar...

Q: die is rolled three times. What is the chance that---  none of the rolls show 2 or more spots?

A:

Q: True or False? Var(Y|X = x0) = Var(Y).

A: We need to answer if: Var(Y|X=x0) = Var(Y) is true or False.

Q: An urn contains 7 white and 3 red balls. Two balls are drawn together at random from the urn. Find t...

A:

Q: If x be a normal variate with mean 3 and variance 16, find the value of t such that P(3 <Xs t) = 0.4...

A:

Q: Solve for the probability of each event. Write your answers as a reduced fraction. A six-sided die ...

A:

Q: The life of a semiconductor laser at a constant Power is normally distributed with mean of 488 hours...

A: Given: Mean (μ)=488standard deviation (σ)=208

Q: For the following problems identify and correct any logical mistakes in the provided solutions. a) G...

A:

Q: a) What is the probability that the individual successfully rolled a 7 in less than 7 rolls? b) If t...

A: Here given 2 dice are rolled  So Total number of outcomes = 6×6 = 36  

Q: 20. If one card is drawn from an ordinary deck of cards, find the probability of getting these resul...

A: As per Bartleby guideline expert have to answer first question three subparts only dear student plea...