ANSWER:
The correct answer is option a that is subtract that observation x from the mean E(X) , and divide by the standard error.
To standardize an observation (either into Z or ), the general idea is to: Subtract that...
Standardize a Normally Distributed Random Varlable Question Suppose X~N(13.5, 1.5), and 9. Find and interpret the z-score of the standardized normal random variable. Sorry, that's incorrect. Try again? The mean is The z-score when x-9 is standard deviations to the left of the mean. This z-score tells you that x-9 is Standardize a Normally Distributed Random Varlable Question Suppose X~N(13.5, 1.5), and 9. Find and interpret the z-score of the standardized normal random variable. Sorry, that's incorrect. Try again? The...
Which of these is the formula for computing the Z score? = (Score - Mean) / Standard Deviation = (Score x Mean) / Standard Deviation = Square Root of the Sum of Squared Mean Differences = Square Root of (Score - Mean) Squared
Consider a distribution with a mean of 15 and a standard deviation of 3. If an observation from the distribution has a z-score of -2, what is the value? Consider a distribution with a mean of 15 and a standard deviation of 3. If an observation from the distribution has a z-score of -2, what is the value?
21) (8 points) The Z-score for an observation from a Normal distribution is -0.4. For the following, choose the one answer that is most appropriate. a. The observation is Left of the mean Right of the mean Very close to the mean It cannot be determined without knowing the mean and standard deviation b. Observations smaller than this value comprise The majority of the distribution Slightly less than half of the values in the distribution Unusually large observations It cannot...
1. Design a circuit which will either subtract X from Y or Y from X, depending on the value of A. If A = 1, the output should be X - Y, and if A = 0, the output should be Y-X. Use a 4-bit subtracter and two 4-bit 2-to-1 multiplexers. (with bus inputs and outputs as in Figure 9-7). Z FIGURE 9-7 Quad Multiplexer with Bus Inputs and Output Cengage Learning 2014 2-to-1 KA 4141 X Y
1) Timothy has finished calculating a z-test. Now he turns to the table of z-scores to find the: a) Critical value b) Test value c) calculated value d) obtained value 2) Joyce has calculated a Z-test with an alpha set to .05. She calculates a z-value of 6.36. What can she conclude? a) none of these b) reject the null hypothesis c) fail to reject the null hypothesis d) the result is too close to call 3) In order to...
Please help! We use Java JGrasp. Write a Java program to take the input of 5 numbers and output the mean (average) and standard deviation of the numbers. If the numbers are x1, x2, x3, x4, and x5, the formula for mean is X = (x1 + x2 + x3 + x4 + x5)/5 And the formula for standard deviation is You can also break standard deviation down like this: 1. Work out the Mean (the simple average of the...
Problem 3 variables with parameter Let r be an unknown constant. Let W be an exponential random A-1/3. Let Xr+w. (a) What is the maximum likelihood estimator of r based on a single observation X (b) What is the mean-squared error of the estimator from part (a):? (c) Is the estimator from part (a) biased or unbiased? Problem 3 variables with parameter Let r be an unknown constant. Let W be an exponential random A-1/3. Let Xr+w. (a) What is...
6. Gravetter/Wallnau/Forzano, Essentials - Chapter 1- End-of-chapter question 22 Use summation notation to express each of the following calculations Add the scores and square the sum O 2(SX) Square each score and then add the squared values Ο Σ(2x + 1) Subtract 2 points from each score and then add the resulting values. Σ(X-29 O (2x)2-2 Ο Σ(x-2) Subtract 1 point from each score and square the resulting values. Then add the squared values. O (2x)2-1 Ο Σ(X2-1)
The time required for Dr. B's students to complete the Statistics Exam is approximately normally distributed with a mean of 40.4 minutes and a standard deviation of 2.2 minutes. Let X be the random variable "the time required for Dr. B's students to complete the Statistics Exam." 6. With the above setting what time marks the 90th percentile? A. 37.562 minutes B. 37.584 minutes C. 43.238 minutes D. 43.216 minutes E. None of the above 7. Which of the following...