# Statistics

posted by .

The distribution of scores on a test is mound-shaped and symmetric with a mean score of 78. If 68% of the scores fall between 72 and 84, which of the following is most likely to be the standard deviation of the distribution? 3, 1, 4, 6?

## Similar Questions

1. ### Stastics

When we convert x-value to z- score and use Standard Normal distribution, which of the following statements is true?
2. ### Statistics

Suppose that two different tests A and B are to be given to a student chosen at random from a certain population. Suppose also that the mean score on test A is 85, and the standard deviation is 10; the mean score on test B is 90, and …
3. ### statistics

If a distribution of IQ test scores has a mean of 100 and a standard deviation of 16, what would be the result if we first subtract the mean (100) from each score, and then divide each of those resulting scores by the standard deviation …
4. ### statistics

the distribution of scores on a test is mound shaped and dsymmetric with a mean score of 78. if 68 percent of the scores fall between 72 and 84, what is the stand deviaition
5. ### math

Statistics: Analyze student exam scores Students were given an exam with 300 multiple choice questions. The distribution of the scores were normal and the mean was 195 with a standard deviation of 30. you may find it helpful to draw …
6. ### MATH

A mean score on a standardized test is 50 with a standard deviation of 10. Answer the following a. What scores fall between –1 and +1 standard deviation?
7. ### statistics

a mean score on a standardized test is 50 with a standard deviation of 10. What are the following: 1. what scores fall between -1 and +1 standard deviation?
8. ### statistics

2. Why is it important to know the mean and standard deviation for a data set when applying the empirical rule?
9. ### Foundations of Measurement

Approximately 400,000 students took the GRE in 2009. Observed mean for the Verbal score was 540 with a standard deviation of 80, and the observed mean quantitative score was 500 with a standard deviation of 100. Assuming distribution …
10. ### statistics

1. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and a standard deviation of 4. Do not use the web calculator to answer the following questions. Instead, …

More Similar Questions