General Statistics
Scientists usually collect data on a ___________ of a population.
What is a sample?
True or False: Range is a measure of central tendency.
What is false?
In a normal distribution this percentage of data falls within one standard deviation from the mean.
What is 68% ?
What is the formula for calculating the standard error of the mean?
What is SEM = (Standard Deviation of the Sample) / √(Sample Size) ?
The basic unit of life.
What is a cell?
Typical data will show __________ _________.
What is normal distribution?
The central tendency measure that represents the average of a set of numbers.
What is the mean?
Standard deviation measures this.
What is the spread of data points from the mean?
Why is the standard error important in science?
What is because it provides a measure of precision or uncertainty for any scientific experiment?
What gas do plants absorb in the atmosphere during photosynthesis?
What is Co2 (carbon dioxide)?
The first step in statistical analysis is to _______ the data.
What is graph?
Arrange the following numbers in ascending order: 3, 2, 5, 1, 4. What is the median?
What is 3?
A larger standard deviation indicates this.
How is the standard error used in hypothesis testing?
The standard error is used to calculate the test statistic and determine the likelihood of obtaining the observed sample mean if the null hypothesis were true
The process by which organisms produce offspring.
What is reproduction?
Atypical data will show ________ distribution.
What is skewed distribution?
If you have the dataset: 10, 12, 14, 16, 18, what is the mode?
What is there is no mode because each number appears only once?
If all data points in a data set are identical, what is the standard deviation?
What is ZERO, because there is no variability.
How is standard error different from standard deviation?
The standard deviation measures the variability or spread of data points within a sample, while the standard error measures the variability of sample means from multiple samples taken from the same population.
The green pigment responsible for photosynthesis in plant leaves?
What is chlorophyll?
True or False: The null hypothesis is typically denoted by Ho.
What is true?
In a dataset with the numbers 2, 3, 4, 4, 5, 6, 7, which number appears most frequently?
What is 4 is the mode since it appears more times (twice) than any other number?
If your dataset is 2,4,6,8, and 10 what is the mean and standard deviation rounded to 1 decimal place?
The mean is 6 and the SD is approx. 2.8
The standard error is calculated by dividing the standard deviation of a sample by the __________.
What is the square root of the sample size?
The main function of red blood cells in the human body.
What is transporting oxygen from the lungs to the body's tissues?