5. In your population with a sex-ratio of 30 percent males (frequency = 0.30) and 70 percent females (frequency = 0.70), what are the expected percentages in your pair-wise sampling of the following? MM: MF: FM: FF:

A study was done to look at the relationship between number of lovers college students have had in their lifetimes and their GPAs. The results of the survey are shown below.   Lovers 4 8 3 7 0 6 5 6 GPA 2.7 2.3 3.4 2.4 3.5 2.9 2.7 2.8        r2r2 =  (Round to two decimal places)    Interpret r2r2 :   There is a large variation in students' GPAs, but if you only look at students who have had a fixed number of lovers, this variation on average is reduced by 80%. Given any group of students who have all had the same number of lovers, 80% of all of these studetns will have the predicted GPA. 80% of all students will have the average GPA. There is a 80% chance that the regression line will be a good predictor for GPA based on the number of lovers a student has had.   The equation of the linear regression line is:   ˆyy^ =  + xx   (Please show your answers to two decimal places)   Use the model to predict the GPA of a college student who as had 7 lovers.GPA =  (Please round your…

Identify the kind of sample that is described. An electronics store polls 300 customers who bought computers at the store within the past two years about high-speed Internet rates. The sample consisted of 150 randomly selected Mac users and 150 randomly selecțed PC users. The sample is a (Choose one) v sample. convenience simple random cluster voluntary response stratified systematic

Step 2 of 2 :   Given the following parameters for a sampling distribution of sample proportions, calculate the standard score of the sample proportion. Round your answer to two decimal places. p=0.65, x=142, n=200