# Get help with research methodology problems

Recent questions in Research Methodology
Ruby Briggs 2022-07-23

### The average number of students per class at school $X$ is $25$ and the average number of students per class at school $Y$ is $33$. Given that there are more classes in school $X$ than in school $Y$, is the average number of students per class for both schools combined less than $29$?

pliwraih 2022-07-23

### In Traditional Survey Reseach, elaborate what are; 1. Nonresponse Bias 2. Refusal rate 3. Response Bias

Lisa Hardin 2022-07-23

### From $10$ numbers $a,b,c,...j$ all sets of $4$ numbers are chosen and their averages computed. Will the average of these averages be equal to the average of the $10$ numbers?

Noelanijd 2022-07-22

### Is a weighted average, assuming the weights sum up to one, always smaller than the unweighted arithmetic average? As if the weights are smaller than one the weighted mean is a convex combination of the individual points. Is there any condition on the individual observation for the statement to hold true?

Nash Frank 2022-07-21

### If I found that a series converges, how can I know to what number it's converging to?I started learning series in calculus and I have trouble catching a basic concept. When I try to find if a series converges or diverges I have many ways to go about it. If I see that the series diverges than I stop there. If I see that the series converges than there is a number it's converging to right?For example: $\sum \frac{2}{{n}^{3}+4}$. I do the limit comparison test with the series $\sum \frac{1}{{n}^{3}}$ and get a finite number 2. I know that $\sum \frac{1}{{n}^{3}}$ converges, so now I know that $\sum \frac{2}{{n}^{3}+4}$ converges also. How do I know to what number it converges to?

Brenton Dixon 2022-07-21

### There is a box with $12$ dice which all look the same. However there are actually three types of dice:$6$ normal dice. The probability to get a $6$ is $1/6$ for each dice.$3$ biased dice. The probability to get a $6$ is $0.85$.$3$ biased dice. The probability to get a $6$ is $0.05$.You take a die from the box at random and roll it.What is the conditional probability that it is of type $b$, given that it gives a $6$?

Livia Cardenas 2022-07-19