Question

In: Math

For a population with µ = 80 and σ = 20 what is the z-score corresponding...

For a population with µ = 80 and σ = 20 what is the z-score corresponding to X=95?

Solutions

Expert Solution

z-score = (X - )/

            = (95 - 80)/20

           = 0.75

                                             

                                                          

                                                            

                                          

                                         


Related Solutions

A population of scores with µ = 73 and σ = 20 is standardized to create...
A population of scores with µ = 73 and σ = 20 is standardized to create a new population with µ = 50 and σ = 10. What is the new value for each of the following scores from the original population?    Scores: 33, 65, and 77.
For a normal population with = 60 and = 20, what is the SE, Z-score and...
For a normal population with = 60 and = 20, what is the SE, Z-score and the probability of obtaining a sample mean equal to or greater than 65 for a random sample of n = 100? Show your work for SE and Z-score calculations. 2 pts Answer: Value Work/Explanation SE Z score P (X-bar ≥ 65)
Find the z-score corresponding to a score of X= 40 and the X value corresponding to...
Find the z-score corresponding to a score of X= 40 and the X value corresponding to z = 0.25 for each of the following distributions. a. μ = 50 and σ = 20 b. μ = 50 and σ = 4 c. μ = 30 and σ = 8 d. μ = 30 and σ = 4
Consider a normal population with μ = 40 and σ = 4.2. Calculate the z-score for...
Consider a normal population with μ = 40 and σ = 4.2. Calculate the z-score for an x of 49 from a sample of size 15. (Give your answer correct to two decimal places
A) Find the z-score corresponding to the given area. Remember, z is distributed as the standard...
A) Find the z-score corresponding to the given area. Remember, z is distributed as the standard normal distribution with mean of μ = 0 and standard deviation σ = 1. Round to two decimals, if necessary. The area to the left of z is 10%. z = The area to the right of z is 50%. z = The area to the left of z is 55%. z = The area to the right of z is 5%. z =...
Suppose that a population is known to be normally distributed with µ = 317 and σ...
Suppose that a population is known to be normally distributed with µ = 317 and σ = 90. If a random sample of size n = 50 is selected, calculate the probability that the sample mean is greater than 300.
A sample is selected from a normal population with a µ = 40 and σ =...
A sample is selected from a normal population with a µ = 40 and σ = 12. After the treatment is administered to the sample, the sample mean is found to be M = 46. Using two-tailed Z-tests (with p < .05): A) Is there a significant treatment effect if the sample size was n = 4? B) If n = 36? C) What are the 95% confidence intervals for these two situations?
Find the z-score corresponding to the given area.  Remember, z is distributed as the standard normal distribution...
Find the z-score corresponding to the given area.  Remember, z is distributed as the standard normal distribution with mean of μ = 0 and standard deviation σ = 1. (a) The area to the left of z is 25%. (b) The area to the right of z is 65%. (c) The area to the left of z is 10%. (d) The area to the right of z is 5%. (e) Find the value for z such that the area between –z...
Let Z be a normal random variable with mean µ = 0 and standard deviation σ...
Let Z be a normal random variable with mean µ = 0 and standard deviation σ = 1, that is, Z ∼ N(0, 1). Find each of the following: (a) P(Z ≤ −1.13). (b) P(Z ≥ −2.18). (c) P(2.13 ≤ Z ≤ 2.57). (d) P(−2.3 ≤ Z ≤ −1.1). (e) P(0 ≤ Z ≤ 1.54). (f) P(−1.54 ≤ Z ≤ 1.54). (g) N(1.1243). (h) N(−1.1243).
1. Raul received a score of 80 on a history test, the z-score is 1.34. He...
1. Raul received a score of 80 on a history test, the z-score is 1.34. He received a score of 85 on a biology test, the z-score is 1.30. On which test did he do better relative to the rest of the class? a. History test b. Biology test c. He scored the class average on both the History and Biology test. 2. Which probability, P(z < -1.18) or P(z > 1.18) is greater? a. P(z < -1.18) b. P(z...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT