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What else can I help you with?
In a standard normal distribution what z value corresponds to 17 percent of the data between the mean and z value?
z = ±0.44
What percent falls below the mean for normal distribution?
In a normal distribution half (50%) of the distribution falls below (to the left of) the mean.
What percent of data falls between 1 Standard deviation below and 2 stand deviations above the mean?
The answer will depend on what the distribution is. Non-statisticians often assum that the variable that they are interested in follows the Standard Normal distribution. This assumption must be justified. If that is the case then the answer is 81.9%
What z-score value separates the highest 40 percent of the scores from the rest of the distribution?
0.2533
What are the z-score boundaries for the middle of 50 percent of the distribution?
50 * * * * * z = -0.67449 to z = +0.67449
What percent of observations are above the third quartile in a distribution?
25 percent
How do you find the population mean for a 95 percent confidence interval?
It depends whether or not the observations are independent and on the distribution of the variable that is being measured or the sample size. You cannot simply assume that the observations are independent and that the distribution is Gaussian (Normal).
Will the quartile always be 25 percent 50 percent and 75 percent?
Yes. The prefix "quart" is derived from the word for 4, so quartile always means splitting the data into 4 sections, ie. 25%, 50%, 75%, 100%.
What percent of your data lies between q1 and q3?
In a dataset, the interquartile range (IQR), which is the range between the first quartile (Q1) and the third quartile (Q3), contains 50% of the data. This means that 25% of the data lies below Q1, 50% lies between Q1 and Q3, and another 25% lies above Q3. Therefore, the percentage of data that lies between Q1 and Q3 is 50%.
Find the percent of the area between the mean and 0.83 deviations from the mean?
It depends on the underlying distribution.
What is the gender distribution in biostatistics?
the gender distribution is 77 percent men and 25 percent women
What percent of data falls above Q1?
In a standard distribution, the first quartile (Q1) represents the 25th percentile of the data. This means that 25% of the data falls below Q1, and consequently, 75% of the data falls above Q1. Therefore, 75% of the data is above Q1.
How do you identify difference between the frequency percent valid percent and cumulative percent columns?
Frequency refers to the count of occurrences for each category, while percent represents the proportion of each frequency relative to the total number of observations, expressed as a percentage. Valid percent excludes any missing or invalid responses, giving a clearer picture of the data that is actually analyzed. Cumulative percent sums the valid percentages progressively, showing the total percentage up to and including each category, which helps in understanding the distribution of responses.
Find the z-score for which 92 percent of the distribution's area lies between -z and z?
z = 1.75
What is the fortieth percentile?
It is the value of the variable such that 40 percent of observations are smaller and 60 percent are larger.
What is limit of cable run between a secondary distribution center and a power distribution panel if wanting to keep voltage drop below 10 percent for the facility being energized?
150 feet
How do you determine the lowest quartile of a series of numbers?
Rank them from highest to lowest. The lowest 25 percent of them represent the bottom quartile. Let's say you have the following data set: 1, 8, 2, 7, 3, 6, 4, 5 Rank them thus: 1, 2, 3, 4, 5, 6, 7, 8 Twenty-five percent of eight (the number of data points) is two. Therefore, the bottom two data points (1 and 2) represent the bottom quartile.
