a. What is the distribution of X? X - N( b. What is the distribution of x? x ~ NO c. What is the probability that one randomly selected person learned to walk when the person was between 10.5 and 12.5 months old?

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A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Suppose the scores on an IQ test are normally distributed. If the test has a mean of 100 and a…

A:

Q: (a) If a random sample of size n = 35 is drawn, find u, o, and P(15 < xs 17). (Round o, to two…

A: a) The following information about the mean and standard deviation has been provided: μ=15, σ=9,…

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Q: 44%  of students in a class have black hair. If 66 students are chosen at random, what is the…

A:

Q: What is the distribution of x=21

A: We know that , A discrete distribution is a statistical distribution that shows the probabilities of…

Q: What is the probability of a sample mean being between z-values of -1.58 and 0.79?

A: We have to find  the probability of a sample mean being between z-values of -1.58 and 0.79?

Q: You play a game of chance that you can either win or lose (there are no other possibilities) until…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: Suppose 10% of probability for a normal distribution ?(?, ? 2 ) is below 25 and 5% above 90, what…

A: From the given information, Consider, X follows normal distribution N (µ, σ). P (X&lt;25) = 0.10 P…

Q: A population has a mean of u = 30. If 3 points are added to each score, what is the mean for the new…

A: Given :  Mean(μ)=30 and N=3

Q: Four rats are selected at random from a cage of 5 male (M) and 4 female (F) rats. If the random…

A: Total number of rats N = 9 Number of male rates K = 5 Rats chosen in sample n = 4

Q: Provide an appropriate response. 11) The probability that a tennis set will go to a tiebreaker is…

A: Suppose a random variable x, defines the number of tiebreakers in tennis set.It is given the…

Q: Q4. A set of final examination grades in an introductory statistics course is normally distributed,…

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Q: 80% of beans seeds sprout. Three seeds were planted. Find the distribution of the variable X number…

A: Given : n = 3 P = 0.80 q = 1 - p     = 1 - 0.80 = 0.20

Q: Suppose the probability a patient will recover from a disease following medication is 0.7. In a…

A: Given : the probability a patient will recover from a disease following medication is 0.7.  In a…

Q: A. What is the mean of the distribution? B. What is the standard deviation of this distribution? C.…

A: Introduction:Suppose a random variable, X has a continuous uniform distribution within an interval…

Q: D. What is the mean of the probability distribution E. What is the standard deviation of the…

A: We have to find d...Mean of the probability distribution e... Standard Deviation of distribution

Q: Suppose x has a distribution with u = 56 and o = 8. A USE SALT (a) If random samples of sizen = 16…

A: From the provided information, Mean (µ) = 56 Standard deviation (σ) = 8

Q: The average number of dropouts for a school district has been 300 per year with a standard deviation…

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Q: A line waiting for tickets to an event has a normal distribution and the mean time is 23 minutes.…

A: Population mean, μ=23 Population sd, σ=4

Q: Find P(66 < x 71). (Round your answer to four decimal places.)

A: Given that :  Mean = 70 S. D. = 8 By using standard normal distribution  Z score = (Xbar -mean ) /…

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A: Let X be a random variable from Binomial distribution with parameter n and p. Mean = np  Variance=…

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A: Note: If the question contains multiple  parts only allow to do first four subparts as per the…

Q: One in ten adults in a city visited a doctor last month. If a sample of 6 adults is selected…

A: Given,  One in 10 adults visited a doctor =&gt; p = 1/10 = 0.1 Sample size, n = 6 Let X is the…

Q: In a distribution with o = 20, a score that has a z-score of z = +0.50 is below the mean by 10…

A: Solution-: Given: We check Z-Score is below the mean by 10 points is true or false

Q: you play a game of chance that you can either win or lose (there are no other possibilities) until…

A: Note: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we…

Q: Boys’ Heights Humans are, on average, taller ‘today than they were 200 years ago. Today, the mean…

A: The given data: Height (in inches) Percent of boys Under 50 0.2 50-54 7.0 55-59 46.0…

Q: a. The mean of this distribution is b. The standard deviation is c. The probability that the the…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: What is the probability of randomly selecting a z-score less than z = -0.25 from a normal…

A: Given that, Z score = -0.25 (Left tailed)

Q: The waiting time before service in a bank is exponentially distributed with a mean waiting time of 5…

A: Exponential Distribution: A continuous random variable X is said to follow Exponential distribution…

Q: The standard deviation of a variable that has a normal distribution controls? a. The spread of the…

A: The standard deviation of a variable that has a normal distribution controls  - The spread of the…

Q: 81. According to a recent Pew Research poll, 75% of millennials (people born between 1981 and 1995)…

A: Let p be the probability that a person is without a profile on a social networking site. Then p =…

Q: a. Suppose you go to Alaska in February where the chance of snow is .90 (90 percent). You are there…

A: From the provided information, The chance of snow is .90 (90 percent) that is p = 0.90 Sample size…

Q: 4. The mean performance score on a physical fitness test for Division I student-athletes is 947 with…

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