e) By examining the histogram of the weight data, determine the percent of the data that fall within 1 standard deviation of the mean.

In a normal distribution, what percentage of scores falls below and score of -2.33

Suppose that you were interested in investigating the effect of a drug that is to be used in the treatment of patients who have glaucoma in both eyes. A comparison between the mean reduction in eye pressure for this drug and for a standard treatment is desired. Both treatments are applied directly to the eye. (a) Describe a reasonable method of collecting data that would result in paired samples. Gather a number of volunteers who suffer from glaucoma in both eyes. Measure the pressure in each eye of each participant before the treatments begin. For each experimental subject, randomly assign the treatments to each participant. Once the patients have applied the treatments for a fixed time, measure again the pressures in all the eyes, and compare the mean reduction in pressure for the eyes that have received the new treatment with the mean reduction in pressure for those that have received the standard treatment. O Gather a number of volunteers who suffer from glaucoma in both eyes.…

In general, how is the magnitude of the standard error of estimate related to the value of the correlation?

The distribution for the time a patient of a medical center spends waiting for an appointment is normal with mean of 35 minutes and standard deviation of 12 minutes. What percentage of patients will wait less than or equal to 40 minutes for an appointment?

The scores on a standardized test are normally distributed with a mean of 95 and standard deviation of 25. What test score is 0.3 standard deviations below the mean?

The height of men in country is normally distributed with mean of 6 feet and variance of 16 inches. What percentage the male population is between 72 and 76 inches in height?

The distribution for the time a patient of a medical center spends waiting for an appointment is normal with mean of 35 minutes and standard deviation of 12 minutes.   How many minutes wait time represents the 80th percentile?

According to the Empirical Rule, in a Normal Distribution of data you will have percent of the data within 1 standard deviation of the mean, percent of the data within 2 standard deviation of the mean, and percent of the data within 3 standard deviation of the mean.

Describe the three measures of variability; the range, variance, and standard deviation.  Explain the impact of outliers on measures of variability.