he number of pairs of dress shoes owned by men is a discrete random variable with the following probability distribution. x 0 1 2 3 4 5 p(x) 0.65 0.14 0.11 0.06 0.03 0.01 (a) What is the variance of this discrete random variable?   (b) What is the standard deviation of this discrete random variable? (Round your answer to two decimal places.)

Q: The probability that 0,1,2,3 or 4 peope will be placed on hold when they call a radio talk show is…

A: The given data represents discrete probability distribution. We have to find the variance and…

Q: Intelligence Quotient (IQ) scores are often reported to be normally distributed with μ=100.0 and…

A: Given that By using z standard normal table

Q: A manager at a store performed a study to determine the probability distribution for the number of…

A: The question is about discrete probability distribution Given :   To find : Mean of prob. dist. and…

Q: K A study was done on proctored and nonproctored tests. The results are shown in the table. Assume…

A: The given values are: n1=31, x¯1=77.19, s1=11.09 n2=33, x¯2=87.66, s2=20.66

Q: The owner of a local movie theater keeps track of the number of tickets sold in each purchase and…

A:

Q: Two six-sided dice are rolled and the random variable x is the sum of the values produced by each…

A: Solution: Given that , Two six -side dice are rolled and random variable x is the sum of the values…

Q: You take a simple random sample of size 25 from a very large population in which the true proportion…

A:

Q: The random variable x represents the number of credit cards that adults have along with the…

A:

Q: distribution with values between 15 and 29. What is the mean and standard deviation of X?…

A:

Q: Suppose the weights of 3-month-old babies are normally distributed—baby boys with a mean of 14.4…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: X is a normally distributed random variable with a mean of 10.0. Find the standard deviation of the…

A: Solution: From the given information, X follows normal distribution with a mean µ=10. Then,

Q: In a hamster breeder's experience the number X of live pups in a litter has the following…

A:

Q: 4. Jane decided to sell her house. A random variable X models the number of passengers in cars…

A: It is given that the probability for the values 1, 2, 3, are 0.3, 0.2 and 0.1 respectively.

Q: Suppose a population has a mean of 870 and a variance of 1,600. If a random sample is size 64 is…

A:

Q: A grocery​ store's receipts show that Sunday customer purchases have a skewed distribution with a…

A: From the provided information, Mean (µ) =29 Standard deviation (σ) = 21 Sample size (n) = 307 For…

Q: Hello. Can this problem be explained to me? Thanks.

A: Given X berandom variable with  uniform distribution on [100 200]The mean of the distribution =…

Q: The mean annual cost for car insurance for a used car is normally distributed with a mean of $381…

A:

Q: The months of July to October are considered rainy season in the Philippines as multiple weather…

A: E(X)=∑ixi p(xi)E(X)=0×0.12+(1×0.20)+(2×0.33)+(3×0.25)+(4×0.10)E(X)=0+0.20+0.66+0.75+0.4E(X)=2.01

Q: 3. P(X) 0.09 0.19 0.39 0.22 0.11

A: We have given that  Probability distribution of discrete random variable x.  Mean = E(x)= ∑x.P(x)…

Q: The random variable x represents the number of emails received at a help desk in one hour, and it…

A: given data, random variable x represent the number of emails received at a help desk in one hour…

Q: Find the mean, variance and standard deviation for the probability distribution given below:   X…

A: Compute the mean for the probability distribution. From the information, given that the probability…

Q: During a recent CD sale at Matt's Music Store, the number of CDs customers purchased was distributed…

A:

Q: Use the fact that the mean of a geometric distribution is u and the variance is o A daily number…

A:

Q: variable X has a uniform distribution with values between 10 and 26. What is the mean and standard…

A: The mean of X can be calculated as: E(X) = a+b2           =10+262           =362           =18

Q: Give the variance of the following distribution? X 0 1 2 3 4 P(X) 0.20 0.35 0.10 0.25 0.10

A:

Q: A survey shows the probability of the number of automobiles that families in a certain housing plan…

A:

Q: Find the variance and standard deviation of each probability distribution below. 2 3 P(X) 0.1 0.45…

A:

Q: Refer to the probability distribution shown below. X 1 3 P(X) 1/8 3/8 3/8 1/8

A: Standard deviation(σ)=E(X2)-E(X)2E(X)=∑X.P(X)E(X2)=∑X2.P(X)

Q: Mary drives to work each morning, and the trip takes an average of µ = 38 minutes. The distribution…

A: Given: µ = 38 minutes,  σ = 5 minutes. The Z follows standard normal distribution. Z=X-μσ

Q: Complete parts (a) and (b) below. The number of dogs per household in a small town Dogs 1 5…

A:

Q: A survey shows the probability of thenumber of automobiles that families in a certain housingplan…

A: Given data,

Q: Suppose the correlation between N and W is 0.2. What is ƠN +w (r e

A:

Q: 5:04 93% The discrete random variable X has the probability distribution given by: 10 P(X = x) 0.2…

A:

Q: The standard deviation of a discrete random variableo is the positive square root of it- O a.…

A: The standard deviation, σ, is the positive square root of the variance

Q: Consider the distribution table below x                5      10   15    20  P ( X = x ) 0.5   0.2…

A: Properties for discrete probability distribution:

Q: Calculate the standard deviation o of X for the probability distribution. (Round your answer to two…

A:

Q: The random variable x represents the number of tests that a patient entering a hospital will have…

A: The given information can be summarized in the following table: x 0 1 2 3 4 Px 317 517 617 217…

Q: Here is a probability distribution: X 2 4 7 10 P(X) 0.3 0.05 0.3 0.35 Find the mean of this…

A: Solution-: We have given following probability distribution: X P(X) 2 0.3 4 0.05 7 0.3…

Q: Traffic Accidents The county highway department recorded the following probabilities for the number…

A:

Q: The random variable x represents the number of credit cards that adults have along with the…

A:

Q: 2. During my office hours (from 12pm to 6pm), an average of about 1 student per hour comes in for…

A:

Q: estions 1. Residents of rural Wisconsin drink an average of 4L of soda per week, with a standard…

A:

Q: Find the mean, variance and standard deviation for the probability distribution given below. Give…

A: