![SOLVED: "In a recent study of 35 ninth-grade students, the mean number of hours per week that they 'played video games was 16.6. The standard deviation of the population was 2.8. Find SOLVED: "In a recent study of 35 ninth-grade students, the mean number of hours per week that they 'played video games was 16.6. The standard deviation of the population was 2.8. Find](https://cdn.numerade.com/ask_previews/9fee5133-720d-404c-8a94-9ee158082ea5_large.jpg)
SOLVED: "In a recent study of 35 ninth-grade students, the mean number of hours per week that they 'played video games was 16.6. The standard deviation of the population was 2.8. Find
![reference request - Why has the time spent studying declined so sharply in the United States over the the past few decades? - Academia Stack Exchange reference request - Why has the time spent studying declined so sharply in the United States over the the past few decades? - Academia Stack Exchange](https://i.stack.imgur.com/aekCA.png)
reference request - Why has the time spent studying declined so sharply in the United States over the the past few decades? - Academia Stack Exchange
![Distribution of respondents by hours spent studying per week (n=117)... | Download Scientific Diagram Distribution of respondents by hours spent studying per week (n=117)... | Download Scientific Diagram](https://www.researchgate.net/publication/332434621/figure/fig2/AS:748137685737472@1555381332254/Distribution-of-respondents-by-hours-spent-studying-per-week-n117-Major-challenges.jpg)