Homework Answers
32)
The answer is True
The reason is
A normal distribution with a mean of 0 and a standard deviation of 1 is called a standard normal distribution. ... Since the distribution has a mean of 0 and a standard deviation of 1, the Z column is equal to the number of standard deviations below (or above) the mean.
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Question 32 (2.8571 points) The z-score follows a normal distribution with u = 1 and o=0,...
For a population that follows a normal distribution, if the z-score of a sample point is...
For a population that follows a normal distribution, if the z-score of a sample point is above 3, it has a percentile rank greater than 99%. True or False.
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a)...
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a) Find P(Z > 0.45). b) Find P(0.7 SZ 1.6). c) Find 20.09. d) Find the Z-score for having area 0.18 to its left under the standard normal curve. e) Find the value of z such that P(-2SZS2) -0.5.
z score question For a standard normal distribution, find: Plz> c) = 0.9632 Find c. Points...
z
score question
For a standard normal distribution, find: Plz> c) = 0.9632 Find c. Points possible: 1 Unlimited attempts. Score on last attempt: 0. Score in gradebook: 0 Submit
потеwork Score: 0/69 0/16 answered Question 1 For a standard normal distribution, find: P(Z <-0.63) Question...
потеwork Score: 0/69 0/16 answered Question 1 For a standard normal distribution, find: P(Z <-0.63) Question Help: D Video D Video Message instructor Calculator Submit Question • Question 2 For a standard normal distribution, find: Plz > -2.97) Question Help: D Video D Video Message instructor 34,707
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a)...
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a) Find P(Z > 0.45). b) Find P(0.7 SZ 1.6). c) Find 20.09. d) Find the Z-score for having area 0.18 to its left under the standard normal curve. e) Find the value of z such that P(-2SZS2) -0.5. 3. (4 points) The scores on a test are normally distributed with a mean of 75 and a standard deviation of 8. a) Find the proportion...
A normal-shaped distribution has u 130 and o = 24. (a) What are the Z-score values...
A normal-shaped distribution has u 130 and o = 24. (a) What are the Z-score values that form the boundaries for the middle 98% of the distribution of sample means? lower z-score boundary: upper Z-score boundary: Report answers accurate to at least 3 decimal places. 36 scores. (b) Compute the z-score for M 140 for a sample of n = Z-score = Report answers accurate to at least 3 decimal places. (c) Is this sample mean in the middle 98%...
In a normal distribution, the mean corresponds to: Standard Score: z = Percentile: Which of the...
In a normal distribution, the mean corresponds to: Standard Score: z = Percentile: Which of the following statements are TRUE about the normal distribution? Check all that apply. A data value with z-score = -1.5 is located 1.5 standard deviations below the mean. The mean corresponds to the z-score of 1. The Empirical Rule only applies when a value is exactly 1, 2, or 3 standard deviations away from the mean. A z-score is the number of standard deviations a...
Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and...
Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1 C 0.2206 z 0 The indicated z score is (Round to two decimal places as needed.) Enter your answer in the answer box Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. 0.7517 z 0 The indicated z score isa (Round to two decimal places as needed.) Enter vour answer in...
If the random variable z is the standard normal score and a >0 is it true...
If the random variable z is the standard normal score and a >0 is it true that p ( z >a ) = p ( z < a ) ? Why pi r Why or What not? yes because normal distribution means is 0 and variance is 1. What is the property does the distribution have?
Prove that if random variable X follows a standard normal distribution (with mean u= 0 and...
Prove that if random variable X follows a standard normal distribution (with mean u= 0 and standard deviation o = 1), then Y = X2 follows a chi-square distribution with 1 degree of freedom. In particular, show that My(t) = Mx2(t) = E[etX?), which equals the moment generating function of a chi-square distribution with 1 degree of freedom.
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a) Find P(Z > 0.45). b) Find P(0.7 SZ 1.6). c) Find 20.09. d) Find the Z-score for having area 0.18 to its left under the standard normal curve. e) Find the value of z such that P(-2SZS2) -0.5.
z
score question
For a standard normal distribution, find: Plz> c) = 0.9632 Find c. Points possible: 1 Unlimited attempts. Score on last attempt: 0. Score in gradebook: 0 Submit
потеwork Score: 0/69 0/16 answered Question 1 For a standard normal distribution, find: P(Z <-0.63) Question Help: D Video D Video Message instructor Calculator Submit Question • Question 2 For a standard normal distribution, find: Plz > -2.97) Question Help: D Video D Video Message instructor 34,707
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a) Find P(Z > 0.45). b) Find P(0.7 SZ 1.6). c) Find 20.09. d) Find the Z-score for having area 0.18 to its left under the standard normal curve. e) Find the value of z such that P(-2SZS2) -0.5. 3. (4 points) The scores on a test are normally distributed with a mean of 75 and a standard deviation of 8. a) Find the proportion...
A normal-shaped distribution has u 130 and o = 24. (a) What are the Z-score values that form the boundaries for the middle 98% of the distribution of sample means? lower z-score boundary: upper Z-score boundary: Report answers accurate to at least 3 decimal places. 36 scores. (b) Compute the z-score for M 140 for a sample of n = Z-score = Report answers accurate to at least 3 decimal places. (c) Is this sample mean in the middle 98%...
Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1 C 0.2206 z 0 The indicated z score is (Round to two decimal places as needed.) Enter your answer in the answer box Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. 0.7517 z 0 The indicated z score isa (Round to two decimal places as needed.) Enter vour answer in...
Prove that if random variable X follows a standard normal distribution (with mean u= 0 and standard deviation o = 1), then Y = X2 follows a chi-square distribution with 1 degree of freedom. In particular, show that My(t) = Mx2(t) = E[etX?), which equals the moment generating function of a chi-square distribution with 1 degree of freedom.
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