6. A distribution of a variable X has the following characteristics: 1%: 0 25%: 0 50%: 0 75%: 4.75 99%: 11.25 Which of the following best describes the distribution of X? A. Left-skewed B. Symmetric C. Right-skewed D. Uncertain

Q:5 The age distribution of 343 students who attended a hip-hop concert is shown below. 4 75 so- Age Which of the following could be the median age? (A) 15.8 (B) 16.5 (C) 17.1 (D) 18.2 (E) 18.5

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…

The national distribution of fatal work injuries in a country is shown in the table to the right under National %. You believe that the distribution of fatal work injuries is different in the western part of the country and randomly select 6231 fatal work injuries occurring in that region. At a = 0.05 National % 42% Western Frequency 2893 Cause Transportation can you conclude that the distribution of fatal work injuries in the west is different from the national distribution? Complete parts a through d below. Equipment Assaults Falls Harmful fumes 19% 1157 14% 806 13% 753 10% 532 Fires 2% 90 a. State Ho and H and identify the claim. What is the null hypothesis, Ho? O A. The distribution of fatal work injuries in the west is 42% transportation, 19% equipment, 14% assaults, 13% falls, 10% harmful fumes, and 2% fires O B. The distribution of fatal work injuries in the west differs from the expected distribution. O C. The distribution of fatal work injuries in the west is 2893…