# Tagged Questions

The tag has no usage guidance.

10 views

### Permutation and combination [on hold]

You are at an ice cream shop that offers 9 different flavors of ice cream. A large ice cream cone comes with three scoops of ice cream. You can choose an ice cream cone with any combination of flavors ...
213 views

### Number of combinations for a 4- digit code lock [closed]

Your suitcase has 4-digit code lock. You forgot the code, but you do remember that the sum of first two digits was equal to the sum of two second digits. How many combinations do you need to check in ...
46 views

### Does combining forecast models produce good prediction intervals?

In this blog post, @rob-hyndman says: If you only want point forecasts, that is the best approach available in the forecast package. It is also better than any of the commercial software (at least ...
40 views

### Basic Proability Doubt

I have a basic probability doubt. If I have 5 different vehicles backstage, out of which 3 random can be showcased to the public. What is the probability of each vehicle to get to showcase? Once a ...
23 views

### How are the outcomes that generated from different predictive models combined to get more accurate predictions?

The simple average is commonly used to combine the predictions of different predictive models. Apart form the simple average, what are the other methods that can be used for combining the predictive ...
9 views

### Which test to use for associations between 2 IV (nominal+continuous) and 1 DV (continuous)?

I have two independent variables, one of which is in nominal scale (binary), while the second is continuous. I want to determine whether any of the combinations of the two are associated with a change ...
39 views

### Combining data in the same study

I have identified 17 studies for use in a meta-analysis. In order to make sure that I analyze the data correctly, I had a couple of questions regarding how to approach two of them. First, one ...
102 views

### How to find the maximum number of independent pairwise comparisons between groups

I have the following situation: Consider a dataset that is comprised of a number of factor levels x = gl(5,1) > [1] 1 2 3 4 5 > Levels: 1 2 3 4 5 I want to ...
81 views

34 views

### Interpretation when Linear Combination of Coefficients in linear regression is not significant

I have a linear regression (OLS) and was told that I could use Linear Combination of Coefficients (lincom with Stata) to analyze the influence of those variables. Unfortunately, my stat skills are not ...