For random samples of size n = 16 selected from a
normal distribution with a mean of 75 and a standard
deviation of 20, find each of the following:
a. The range of sample means that defines the middle
95% of the distribution of sample means
b. The range of sample means that defines the middle
99% of the distribution of sample means
For random samples of size n = 16 selected from a normal distribution with a mean...
For random samples of size n= 16 selected from a normal distribution with a mean of μ=75 and a standard deviation of σ=20 find each of the following:The range of sample means that defines the middle 95% of the distribution of sample meansThe range of sample means that defines the middle 99% of the distribution of sample means
For random samples of size selected from a normal distribution with a mean of μ and a standard deviation of σ, find each of the following:The range of sample means that defines the middle 95% of the distribution of sample meansThe range of sample means that defines the middle 99% of the distribution of sample means
1) Random samples of size n were selected from populations with the means and variances given here. Find the mean and standard deviation of the sampling distribution of the sample mean in each case. (Round your answers to four decimal places.) (a) n = 16, μ = 14, σ2 = 9 μ=σ= (b) n = 100, μ = 9, σ2 = 4 μ=σ= (c) n = 10, μ = 118, σ2 = 1 μ=σ= 3) A random sample of size...
Suppose x has a distribution with a mean of 70 and a standard deviation of 20. Random samples of size n = 64 are drawn. (a) Describe the distribution. x has a geometric distribution. has a normal distribution. x has an unknown distribution. x has a Poisson distribution. X has an approximately normal distribution. x has a binomial distribution. Compute the mean and standard deviation of the distribution. (For each answer, enter a number.) Hy = Oz = (b) Find...
2. 22 random samples were selected from a population that has a normal distribution. The sample (1 point) has a mean of 99 and a standard deviation of 5 . Construct a 95% confidence interval for the population standard deviation 76 < σ < 141 3.What are the critical values 2? and 2 that correspond to a 99% confidence level and a (lpom) sample size of 30? 13.121, 52.336 13.787, 53.672 14.257, 49.588 19.768, 39.087
A random sample of n1=16 is selected from a normal population with a mean of 74 and a standard deviation of 7. A second random sample of size n2=8 is taken from another normal population with mean 69 and standard deviation 14. Let X1 and X2 be the two sample means. Find: (a) the probability that X1-X2 exceeds 4. (b) the probability that 4.0 = X1-X2 = 5.1.
Random samples of size n were selected from populations with the means and variances given here. Find the mean and standard deviation of the sampling distribution of the sample mean in each case. (Round your answers to four decimal places.) (a) n = 36, μ = 11, σ2 = 9 μ= σ= (b) n = 100, μ = 4, σ2 = 4 μ= σ= (c) n = 8, μ = 110, σ2 = 1 μ= σ=
Consider this experiment: A random sample of size n1 = 16 is selected from a normal population with a mean of 75 and a standard deviation of 8. A second random sample of size n2 = 9 is taken from another normal population with an unknown mean and a standard deviation of 12. Assume the two samples are independent. Let x̄1 and x̄2 be the sample means. In each run of the experiment, you compare the two sample means by taking...
A random sample of size n1 = 16 is selected from a normal population with a mean of 75 and variance of 288. A second random sample of size n2 = 9 is taken independently from another normal population with mean 80 and variance of 162. Let X^1 and X^2 be the two-sample means. Find the probability that X^1 + X^2 is less than 158. Select one: a. 0.7385 b. 0.3085 c. 0.6915 d. 0.4235
A random sample of size n = 64 is selected from a population with mean μ = 52 and standard deviation σ = 24. a. What will be the approximate shape of the sampling distribution of x? skewed symmetric normal b. What will be the mean and standard deviation of the sampling distribution of x? mean= standard deviation=