Since x is a Binomial random variable with a mean of 1.8 and a probability of success of 0.6, what is its standard deviation? a) 0,849 b) 1,800 C) 0.900 d) 1.342 E) 0.620

Q: A study shows that 30 percent of children in a given developing country are malnourished. Using…

A: Givenp=0.30sample size(n)=25Let "x" be the no.of children from a rgion is malnourished…

Q: The mileage (in 1,000s of miles) that car owners get with a certain kind of radial tire is a random…

A: Step 1:Step 2: Step 3: Step 4:

Q: Find the mean and standard deviation for each binomial random variable. Given: n = 30, π = .90 and n…

A: According to the Bartleby guidelines experts solve only one question and rest can be reposted.

Q: Exercise 2 Solve the following problems. 1. Find the mean of the probability distribution of the…

A: Given that  Probability mass function of X is  P(X=x)=(x-3)/15   , x=7,8,9   Find E(X)

Q: A company that rents DVDs from vending machines in grocery stores has developed the following…

A: Given that  X 1 2 3 4 P(X) 0.5 0.3 0.1 0.1 1a) Mean of X: X 1 2 3 4   P(X) 0.5 0.3…

Q: 8. In a Youth Club, the expected number of people who can play a musical instrument is 4 and the…

A: Excepted No.  = 4 Variance = 3.2

Q: *Assume that the random variable X is normally distributed, with mean - 45 and standard deviation…

A: Solution

Q: *Assume that the random variable X is normally distributed, with mean - 45 and standard deviation…

A:

Q: 10. From historical data, the Probabilities of 0, 1, 2, 3, 4, or 5 calls in a 5 minute- period are…

A: Given: X: No. of calls arriving in 5-min period X P(x) 0 0.1 1 0.15 2 0.25 3 0.2 4…

Q: *Assume that the random variable X is normally distributed, with mean - 45 and standard deviation…

A:

Q: A) y= Q25. The correlation coefficient (r) between X A)-0.8987 B) 0.8632 C) -0.9603 enswer: D)

A: We have given that,  X :- 3, 4, 6, 8, 10 Y:- 8, 6, 7, 5, 3 Then,  We will find the correlation…

Q: 50 % of a population would vote for candidate A. If population standard deviation is 20 and sample…

A: Given,sample size(n)=400population proportion (P)=0.5sample proportion(p¯)=0.5standard…

Q: The mean height of women in a country​ (ages 20−​29) is 64.3 inches. A random sample of 50 women…

A: Solution: Let X be the height of women in a country (ages 20-29). From the given information, X has…

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.24%. A random sample of 33 of…

A: Solution-: Given: n=33,μ=2.24,σ=1.33 We find,  P(the mean childhood asthma prevalence for the sample…

Q: 10. X 0 15 30 45 60 P(X=x) 0.24 0.46 0.13 0.11 0.06

A: We have given a probability mass function of a random variable  as follows:…

Q: Which of the following statements is true? a). The mean of a random variable characterizes the…

A: Solution: Mean. Median and mode are the measures of central tendency. The range . standard…

Q: the probability that the sample mean is between 448 and 453 is closest to _______.

A: Let M be the sample mean for the sample of size n = 100.

Q: The probability that the sample mean of a random variable X is more than 1.96 standard deviations…

A: We have to find correct answer..

Q: X and Y are independent random variables with expected values and standard deviations as shown. X Y…

A: Given that      E(x) = 80     E(Y)= 12 Sd(x) = 12 Sd(Y)= 3 We have to find Sd(x-y)

Q: Let X denote the number of luxury cars sold in a given day at a certain car dealership. X…

A: Here the given table is we have to find the variance, standard deviation and mean

Q: Given that z is a standard normal random variable, what is the probability that -2.51 SS-1.532…

A: Given Data: z represents the standard normal distribution   To Find: P(-2.51<z<-1.53)

Q: Given that z is a standard normal random variable, compute the following probabilities (to 4…

A:

Q: If ? is a binomial random variable, compute the mean, the standard deviation, and the variance for…

A: a) n = 3 p = 0.7   i) The mean is given byMean =npMean = 3 x 0.7 = 2.1ii) The standard deviation is…

Q: What is the probability it will take him more than 1020 shots to hit it? f. What is the expected…

A: here given ,  A novice marksman is shooting at a target 1000 feet away. The probability of his…

Q: A sample of n 12 scores is selected from a normal population with u = 50 and o = 10. a. What iš the…

A: Given that, Mean = 50 Standard deviation = 10 Sample size = 12

Q: The mean height of women in a country​ (ages 20 −​29) is 64.3 inches. A random sample of 75 women in…

A: The mean height of women in a country​ is 64.3 inches. A random sample of 75 women in this age group…

Q: A random sample of n = 4 scores is selected from a population with a mean of 50 and a standard…

A:

Q: A) (26.08, 26.32) Q22. The maximum error (the margin of error) of the estimation "E" is: C) 2.34 B)…

A:

Q: A team of researchers obtained a z-score for their sample that was z= 0.50. If they were conducting…

A: The  z-score for their sample that was z= 0.50. The level of significance is α=0.05 The probability…

Q: For each binomially-distributed random variable x, provide the expected value, the variance, the…

A:

Q: Q18. If n = 32,0 = 5.15, = 26.2,a= 0.05, In testing H,:u=25,H₁:25, the rejection region is A) Z>…

A: Given that  Sample size n =32 Sample mean =26.2 Population standard deviation =5.15 NOTE:- According…

Q: X and Y are independent random variables with expected values and standard deviations as shown. X Y…

A: From the provided information, X and Y are independent random variables with expected values and…

Q: (b) The population variance is actually unknown, the observed sample variance is 2.25. Based on…

A: Instruction : "Q2"   Population mean = 9.25 hours a day n = 16 sample variance , s2 = 2.25 sample…

Q: Suppose z is a standard normal random variable. Find the z-value given probabilities: a. z-value…

A: given data standard normal distributiopnZ~N(0,1)

Q: If Z is a standard normal random variable, then what is the probability that Z> 1.5 or Z<…

A:

Q: *Assume that the random variable X is normally distributed, with mean - 45 and standard deviation…

A:

Q: Find the following probabilities for the standard normal random variable z: a. P(z > 3.09) b. P(z ≤…

A: To find these probabilities for the standard normal random variable (z), you can use a standard…

Q: If Z is a normal random variable with mean 0 and standard deviation 1, find the following…

A:

Q: Suppose that the temperatures of healthy humans are approximately normally distributed with a mean…

A: From the provided information, Mean (µ) = 98.6 degrees Standard deviation (σ) = 0.8 degrees X~N…

Q: What is the probability that a randomly selected z-value will be greater than 2.23?

A: According to the provided information, we need to calculate P(Z>2.23)

Q: X -6 -1 0 8 P(X= x) 0.21 0.25 0.26 0.28

A: Given information-We have given the probability distribution for X.Value of XProbability…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.