Calculating the Z-score is the last step when evaluating a normal distribution curve. O True O False
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A: 1) Given: Sample size n=50 Sample mean x¯=5.7
Q: Which describes a normal distribution with mean μ and variance o²?
A: here use basic of normal distribution curve
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A: Given mean of μ =109 standard deviation of σ = 14 Sample size of n = 25 Z = (x - mu)/σ/√n
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A: From the provided information, Mean (µ) = 3.3 Standard deviation (σ) = 0.95 X~N (3.3, 0.95)
Q: Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and…
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Q: Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and…
A: Given that:Z is standard normal Distributed with i.e. mean µ =0 and standard deviation σ =1 By…
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A: We will exaplain all things about uniform distribution.
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Q: Suppose that Xhas a normal distribution, Find E[ex].
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A: Correct option is a a. 0.5
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A: We want to find the probability by using standard normal distribution table.
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Q: Direction: Find the probabilities on a standard normal curve. 1. P(z<0.45) 2. P(-3.0<z<-1.68)
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A: We have find z score..
Q: at percent of the total population is found between the mean and the z-score given? (Use the…
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Q: For the standard normal distribution, which of the statements below is correct? A. Standard…
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- Estimating Mean SAT Math Score The SAT is the most widely used college admission exam. (Most community colleges do not require students to take this exam.) The mean SAT math score varies by state and by year, so the value of u depends on the state and the year. But let's assume that the shape and spread of the distribution of individual SAT math scores in each state is the same each year. More specifically, assume that individual SAT math scores consistently have a normal distribution with a standard deviation of 94. An educational researcher wants to estimate the mean SAT math score (u) for his state this year. The researcher chooses a random sample of 681 exams in his state. The sample mean for the test is 486. Find the 99% confidence interval to estimate the mean SAT math score in this state for this year. Use the unrounded values in Excel to find the answers to #2, #3 and # 4. 1. The z-value is -- ✔ 2. The standard error has a value of -- 3. The margin of error has a value of - 4.…Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1.the indicated Z score is+ + 69 78 87 96 105 114 Based on the graph of this normal distribution, a. The mean is b. The median is c. The mode is d. The standard deviation is + 123
- What percent of the total population is found between the mean and the z-score given? (Use the standard normal distribution table and enter your answer to two decimal places.) z = 3.32The time spent (in days) waiting for a heart transplant in two states for patients with type A+ blood can be approximated by a normal distribution, as shown in the graph to the right. Complete parts (a) and (b) below. u=122 o= 21.4 (a.) What is the shortest time spent waiting for a heart that would still place a patient in the top 25% of waiting times? _____ days (Round to two decimal places as needed.) (b.) What is the longest time spent waiting for a heart that would still place a patient in the bottom 20% of waiting times? ______ days (Round to two decimal places as needed.)9
- Using the z table (The Standard Normal Distribution Table), find the critical value (or values) for the right-tailed test with a=0.09 . Round to two decimal places, and enter the answers separated by a comma if needed. Critical value(s) :What percent of the total population is found between the mean and the z-score given? (Use the standard normal distribution table and enter your answer to two decimal places.) z = 3.42Find the indicated Z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1.
