deviation of 9. A second random sample size n2 =10 is taken from another normal population with mean 71 and a standard deviation 13. Let x barh and x bar2 be the sample means. Find: a. The probability that xbar1 – xbar2 exceeds 4.5 b. The probability that 3.5 s xbar1 - xbar2 s 5.5

Q: distribution of the sample mean whern Normal with mean p and variance o. Normal with mean o and…

A: The sampling distribution of a statistic is known as the the probability distribution of all the…

Q: Alex’s times for running a mile are Normally distributed with a mean time of 5.28 minutes and a…

A: Let n1 be the sample size of alex  n2 be the sample size of chris Given  n1=10, n2=15 , standard…

Q: Find the probability that the sample mean is between 40 and 50. Sample size is 36 are drawn randomly…

A: From the provided information, Mean (µ) = 45 Standard deviation (σ) = 20 X~N (45, 20) Sample size…

Q: Let x be a random variable representing the length of trout in a lake.  A friend claims that the…

A: We have given that,  Sample mean length (x̄) = 19.4 and sample standard deviation (s) = 3.8 and…

Q: Refer to the accompanying table, which describes results from groups of 8 births from 8 different…

A:

Q: A sample of the number of sick days used by employees at a clinic is as indicated: 0,    0,    1,…

A: Given data 0,0,1,1,2,4

Q: Which expression entered into a graphing calculator will return the probability that a data value in…

A:

Q: Let X be a random variable with a mean of 50 and a variance of 64. Find: i. P(x< 52) ii. P(35 < X <…

A:

Q: Select one: O a.0.25 b.None C.-0.8 d.0.80 e.0.98 f.-0.98

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: Consider throwing a die 20 times. Let X be the number of times th outcome is less than 3. Find the…

A: Given that  n=20  , p=2/6=1/3 , q=1-p=1-(1/3)=2/3 X=Number of times the outcomes less than 3…

Q: The sick leave time of employees in a firm in a month is normally with a mean of 100 hours and a…

A: Let X be a continuous random variable of employees sick leave time in a firm in month (in hours) is…

Q: Which of the following does not belong to the steps in finding the variance of probability…

A: Variance : A applied mathematics measure of the dispersion between values in an exceedingly…

Q: Driver’s Education. In order to determine whether or not a driver’s education course improves the…

A: Score After (x1): n=7 Mean(M1)= (92+86+...97)/7 M1 =90.71 df1=n-1 = 6   Score After (x2): n=7…

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 100 and the mean…

A: We have given that Variance (σ2) = 100 Standard deviations (σ) = √Variance (σ2) = √100 Standard…

Q: Select all that apply: A has the larger mean. B has the larger mean. The means of A and B are…

A: Find the true statement from given graph For a and b

Q: The discrete probability distribution is given by k 2k 3k i. Show that k = 1/6 ii. Find the mean of…

A:

Q: 3. Complete the first 3 columns of the table below. Values Deviations Square deviations X - X X…

A: X-bar = 5.9 s= Σ(Xi-Xbar)2/(n-1)

Q: Let X be a normally distributed random variable with a mean of 12 and a standard deviation of 1.25.…

A: given data  normal distribution μ = 12σ = 1.25P(x&lt;14) = ?

Q: The IQ's in a certain population are normally distributed with a mean score of 104 and a standard…

A: Given, Mean =104 standard deviation =14

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 78 mph and…

A:

Q: A random variable follows a normal distribution with mean 12k and variance σ 2 . The probability…

A: Given that : A random variable follows a normal distribution with mean 12k and variance σ2. The…

Q: ilustration 17.8. For a binomial distribution the mean is 6 and standard deviation is 2. Write out…

A:

Q: Thirty percent of people did not visit their doctor's, offices last year. Let x be the number of…

A:

Q: B. Find the mean, variance, and standard deviation of a discrete random variable X that follows a…

A:

Q: A random variable follows a binomial distribution with a probability of success equal to 0.68. For a…

A:

Q: Let X be a random variable with X -3 and oz = 5. Find the mean and the variance of Y = -2X -3

A: