Probabilities from the standard normal distribution
1.Find the probability a randomly selected person has an IQ greater than 130.
Probability Statement: :
Draw a Picture:
2. Use probabilities from the standard normal distribution to verify the Empirical Rule
P(-1 Draw a Picture:
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Find the average and the SD for the list {11, 15, 9, 7, 3}. Using the average and SD you found, convert the values in the list to standard units. For each member of the list, state how many SDs it is above or below the average of the list. Without
Find the correlation coefficient. Using this to predict the value of y when x = 15. Find the root-means square error of the regression line that predicts y from
A professor measures the time X that students take to complete an examination, and the score Y that the students receive. The following measurements are obtained: X: time, Average time (X) = 30 SDx = 10 Y: scores, Average score (Y) = 70 SDy = 20
The percentage of values in some commonly used intervals are. 68.3% of the values of a normal random variable are within plus or minus one standard deviation of its mean.
Find the probability a randomly selected person has an IQ greater than 130.
A previous study found a standard deviation of four hours. How many MRI machines must the company find data for in order to have a margin of error of at most 0.5 hours when calculating a 98% confidence interval?
What are the hypotheses needed to test the clain of the report? The results from the sample given below. Complete the expected counts for the hypothesis test.
Which of the following is not an assumption needed for one-way analysis of variance?
Suppose you have a sample of 6 observations from a normal population. the sample variance is equal to 4. Find a 90% lower confidence interval for the variance of the population
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