what is the Zscore corresponding to a raw score of. X = 30 taken from a...
2. For the following raw data from scores on a test, compute the Z score. The mean for the distribution is 10 and the standard deviation is 4. Xi ZScore 14 100
Ho u >= 75 HA u < 75 A sample of 30 items was taken from a large population. The sample mean was 72 and the population standard deviation was 7. Using alpha = 0.05, what is the critical value? 1.96 O 1.645 0 -1.645 -1.96 Question 4 Consider the following hypothesis: Ho u >= 75 HA ll < 75 A sample of 30 items was taken from a large population. The sample mean was 72 and the population standard...
A population of scores has a standard deviation of 5. In this population a raw score of 45 corresponds to a z score of 1.5. What is the population mean?
IQ-scores are standard-score transformed scores having a mean of 100 and a standard deviation of 15; SAT scores are standard-score transformed scores having a mean of 500 and a standard deviation of 100. In what follows, X refers to a raw score from a distribution with a mean of X and a standard deviation of S, and SAT and IQ refer to the corresponding transform of that score. Solve for the missing value in each of the following: (a) X=-2.5;Xmean=...
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QUESTION 1 Match the symbols with their appropriate identifier. Raw Score A X Sample Size Sample Mean Population Mean Sample Standard Deviation Population Standard Deviation Sample Variance Population Variance B. 2 C. N D. X E.ơ G.s H. p Click Save and Submit to save and submit. Click Save All Answers to save all answers.
If random variable X has normal distribution with mean u=50 and the standard deviation q=2 , then the value of z-score corresponding to the value X =60 is : - 10 - 5 - 50 - 0
For a given raw score to be converted into a z score, one must know both the mean and standard deviation of the raw score distribution. True False
(2 Points) A random sample of size n = 25 is taken from a population with mean u = 530 and standard deviation o = 100. Then the sampling distribution of the sample mean X has normal distribution with mean 530 and standard deviation 20 has normal distribution with mean 530 and standard deviation 100 has normal distribution with mean 530 and standard deviation 2 has normal distribution with mean 530 and standard deviation 4
For the confidence interval given by the formula X 1.13. , what is the corresponding confidence level? For the purposes of this question, we can assume that is sufficiently large, and is known. Express your answer as a percent, but do NOT include the percent sign %) in your response. Round your response to at least 2 decimal places. Number A random sample of size 15 was taken from a normally distributed population with a population mean 28 and a...
13. If we have a normal distribution with a mean of 75 and a standard deviation of 3. a. what z-score(s) would cut off the middle 40% of the distribution? b. what raw score(s) would cut off the lower 12% of the distribution? c, what raw score(s) would cut off the most extreme 5% of the distribution? d, what T-score(s) would cut off the upper 20% of the distribution?
13. If we have a normal distribution with a mean of...