![subject](/tpl/images/cats/mat.png)
Mathematics, 01.02.2021 22:20 CHRONICxDJ
Suppose that you collected data on GPA and the number of studying hours(H) for 100 students at UCR. The data is summarized as follows: 20 students study 6 hours a day and have a GPA of 2.0, 30 students study 6 hours a day and have a GPA of 4.0, 10 students study 10 hours a day and have a GPA of 2.0, and 40 students study 10 hours a day and have a GPA of 4.0. Please solve the following questions:
1. Find the join and marginal probabilities? ( hint: you may use a table with GPA and hours (H))
2. Find the probability of hours= 6 given that the GPA=2.0?
3. Find the probability of GPA-4 given hours = 10?
4. Find the mean or expected value of hours (E(H))?? Find the variance of hours (V(H))?
5. Find the mean or expected value of GPA (E(GPA))?? Find the variance of GPA (V(GPA))?
6. Find the covariance between hours and GPA ( Cov(H, GPA)? Are the GPA and hours of studying independent?
7. Find the coefficient of correlation between hours and GPA ( r(H, GPA))?
8. Find the expected value (mean) of hours given that the GPA=2.0 ? Find the variance of hours given that the GPA=2.0?
9. Find the expected value (mean) of GPA given that the hours= 10? Find the variance of GPA given that the hours=10?
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:00
You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:10
Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 20:00
The total number of dental clinics total for the last 12 months was recorded
Answers: 3
![question](/tpl/images/cats/mat.png)
You know the right answer?
Suppose that you collected data on GPA and the number of studying hours(H) for 100 students at UCR....
Questions
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.03.2020 23:03
![question](/tpl/images/cats/en.png)
English, 25.03.2020 23:03
![question](/tpl/images/cats/mat.png)
Mathematics, 25.03.2020 23:03
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 25.03.2020 23:03
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 25.03.2020 23:03
![question](/tpl/images/cats/istoriya.png)
History, 25.03.2020 23:03
![question](/tpl/images/cats/himiya.png)
Chemistry, 25.03.2020 23:03
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 25.03.2020 23:04
![question](/tpl/images/cats/mat.png)
Mathematics, 25.03.2020 23:04
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 25.03.2020 23:04
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)