Answer : 133 ( 1st option )
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If a sample has a mean of 101 and a standard deviation of 16, what is...
The standard IQ test has a mean of 101 and a standard
deviation of 16. Determine the required sample size if we want to
estimate the population mean with 98% confidence to within 4 IQ
points of the true mean.
D Question 11 1 pts The standard IQ test has a mean of 101 and a standard deviation of 16. Determine the required sample size if we want to estimate the population mean with 98% confidence to within 4 IQ...
Suppose a set of data has a sample mean of 106 and a sample standard deviation of 19.8. What is the Z-score for the value 122.0? Round the 2-score to two decimal places. Your Answer: Answer
Consider a set of data in which the sample mean is 80.4 and the sample standard deviation is 3.5. Calculate the score given that x = 73.3. Round your answer to two decimal places. Answer How to Enter) 1 Point im Tables Keypad Keyboard Shortcuts
Suppose a random variable has mean 10 and standard deviation 3. What is the value of the random variable which corresponds to a z-score of 2? SUBMIT ANSWER
47. What happens to the mean and standard deviation of the distribution of sample means as the size of the sample decreases? A) The mean of the sample means stays constant and the standard error decreases. B) The mean of the sample means increases and the standard error stays. C) The mean of the sample means decreases and the standard error increases. D) The mean of the sample means stays constant and the standard error increases. 48. Find the critical value ze that corresponds to...
6. A normal distribution of has a mean of 20 and a standard deviation of 10. Find the z-scores corresponding to each of the following values: (10 points) a) What is the z score for a value of 30? b) What is the z score for a value of 10? c) What is the z score for a value of 15? d) What it P(20<x<30)? e) What is P (x > 10)? ) What is P (x < 15)? g)...
Question 4 0.5 pts A data set has a mean of 44. In this data set, a raw score X-40 corresponds to the standardized score z-1. What is the standard deviation for this data set? Hint:take advantage of the formula for Z-score Question 5 0.5 pts A data set has a standard deviation of 2.5. In this data set, a raw score X-30 corresponds to the standardized score z = 1.30. What is the mean of this data set? Hint:take...
16 measured data points have a sample mean of -34 and a standard deviation of 1.78. Determine the best estimate of the mean value at 90% probability level. Find a, where the best estimate of the mean value is expected to fall ±a about the sample mean.
For a normal population with an average of 60 and a standard deviation of 12 what is the probability of selecting a random sample of 36 scores with a sample mean greater than 64? p(M greater than 64)? a 50% b .9772 or 97.72 % c. .8777 or 87.77% d. .0228 or 2.28% A population has a mean of 50 and a standard deviation of 5, find the z-score that corresponds to a sample mean of M=55 for a sample...
suppose ACT reading scores are normally distributed with a
mean of 21.4 and a standard deviation of 5.9 . A university plans
to award scholarships to students who’s scores are in the top 9%.
what is the minimum score required for the scholarship?
Suppose ACT Reading scores are normally distributed with a mean of 21.4 and a standard deviation of 5.9. A university plans to award scholarships to students whose scores are in the top 9 %. What is the...