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What statistical test should be used to determine if the average scores of two independent groups?
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Why are control groups used in statistical studies?
Because its the group for which the idependent variable is help constand in a statistical study.
What are independent and dependent variables in science?
Dependent variable is the variable that can be measured. However, the independent variable is the variable that changes in the two groups.
What is the average allowance of a 9 year old?
It's probably difficult to find some kind of statistical average, as there is no reported national consensus for average allowances for certain age groups. I myself never was paid allowance, but I bet it usually has to do with your parent(s)' income and the balance between alloting you some economic freedom without spoiling you and shirking your potential for self-responsibility in the future.
When independent sample t test is used?
The Independent Samples T Test compares the mean scores of two groups on a given variable.
What does it mean when a researcher sets an observed p value 0.05 Are all statistical difference between groups that reach the 0.05 level or 0.01 level meaningful?
Yes, in fact any statistical having a probability of occurence under the null hypothesis less than 0.05 would be considered significant.
How do you choose the most appropriate statistical procedure?
To choose the appropriate statistical test, the following four question must be answered; What are your dependent and independent variables? What is scale of measurement of the variables? How many groups/samples are there in the study? Have I have met the assumptions of the statistical test?
Why are control groups used in statistical studies?
Because its the group for which the idependent variable is help constand in a statistical study.
How can a scientist do a controlled experiment if it is not possible use several different groups?
Not every experiment has control groups. If control groups are not feasible, you do what you can, and you may still learn something of interest. In the case of something like medical research, which really should have control groups, you can still use general statistical information to establish a baseline. People (for example) normally grow to a certain average height. We administer experimental drug X to our subjects, and they grow to a certain height which can be compared to the statistical average. This does tell us something.
Do bandicoots live in groups?
No. They are independent and do not live in groups.
Are polar bears independent or do they live in groups?
for most of their life they are independent
How can a scientist do a controlled experiment if it is not possible to use several different groups?
Not every experiment has control groups. If control groups are not feasible, you do what you can, and you may still learn something of interest. In the case of something like medical research, which really should have control groups, you can still use general statistical information to establish a baseline. People (for example) normally grow to a certain average height. We administer experimental drug X to our subjects, and they grow to a certain height which can be compared to the statistical average. This does tell us something.
Are elephants independent?
No, they stick together in groups
How much has global warming caused the temperature to rise?
Over the past two decades, three independent groups have used varying statistical methods and arrived at nearly identical conclusions that the planet's surface, on average, has warmed about 0.75 degrees Celsius since the beginning of the twentieth century. Of course, this is an average and for many reasons, some zones have warmed much more than others. In addition, variations in weather patterns result in maximum temperatures rising much more than the average.
Do humpback whales live in groups or independent?
They live in pods or groups and actually have a family structure.
Why do scientists try to test large groups of individuals in control and experiment groups?
There are always possibilities that certain persons respond differently to scenarios presented in experiments. So, in order to get a better correlation between variables and outcomes, and to be able to determine outliers in the statistical data, the sample population in each is made as large as possible in each group.
Which statistical test should I use?
You could do regression with crime rate the dependent variable and unemployment rate as the independent variable. Why do you need to have two tests?
What is t Test?
t-test is the statistical test used to find the difference of mean between two groups
