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Finding the value of X using normal distribution given standard deviation and mean.
A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally distributed with a mean of 22 and a standard deviation of 5.2. Scores on the second test are normally distributed with a mean of 72 and a standard deviation of 11.5. Assume that the two tests use different scales to measure the same aptitude. If a student scores 28 on the first test, what would be his equivalent score on the second test? (That is, find the score that would put him in the same percentile.)A. 86B. 85C. 78D. 83
Construct a grouped frequency distribution using six classes.
Assume a population standard deviation of 450-kilowatt hours. Determine the standard error of the mean.
The Bureau of Labor Statistics says that baggage handlers, trash haulers, and coal miners are among the occupations having the highest risk of the debilitating injury or illness. For coal miners working over the course of a year, 3.60 injuries per..
We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
By using this data and incorporating seasonal effects, predict quarterly turnover for 2010.
Compute standard error of mean? Compute the margin of error, with 95% confidence.
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
The mean amount purchased by a typical customer at Churchill\'s Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the foll..
What is the probability that a respondent said neither the Big Ten nor the Pac-10 would have a team in the Rose Bowl?
For the data giben below, prepare a R-chart. Note that the sample size is three.
Use the method of least squares to model the relationship between x and y.
Enter data into SPSS (use two columns: one for coding {0, 1, 2, 3, 4, 5} and one for DV)
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