Ages Number of students 15-18 4 19-22 5 23-26 10 27-30 5 31-34 10 35-38 5 Find the relative frequency for the class with lower class limit 19
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| Ages | Number of students |
|---|---|
| 15-18 | 4 |
| 19-22 | 5 |
| 23-26 | 10 |
| 27-30 | 5 |
| 31-34 | 10 |
| 35-38 | 5 |
Find the relative frequency for the class with lower class limit 19
Relative Frequency = %
Give your answer as a percent, rounded to two decimal places
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- what is the difference between frequency and relative frequency?Incidence-Proportion In the study of hypertensive individual, 100 of the 189 hypertensive men died during the 13-year follow-up period. Calculate the risk of death for these men. Numerator = 100 deaths among the hypertensive men Denometator = 189 hypertensive men Multipller = 100 (One decimal place only. No need to include “%” sign to your answer.)Suppose you studying the relationship between time studied for the LSAT and score on the LSAT. To study this you randomly select 9 students who took the LSAT, ask them how long they prepared for the exam and then record their score. Hours Studied 80100120120150160180200210 Score (in points) 140131138143158149162161157 (a) Draw a scatterplot for this data. Make sure to label your axes. (b) Calculate the correlation coefficient for this data. Is there enough evidence for a correlation? Why or why not? (c) Give the equation of the least squares regression line for this data. (d) Interpret the slope of the LSR in the context of this situation. (e) What is the predicted score for a student who studies for 140 hours? Would you trust this prediction? Why or why not? (f) Calculate the residual for the LAST data point in your sample, the student who studied 210 hours and got a score of 157 points. Make sure to include units for your residual.
- (b) What is the change in mean chlorine content when the degree of delignification increases from 7 to 8?What is the change in mean chlorine content when the degree of delignification increases from 9 to 10?234 Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results were: Aptitude Score Frequency 1. 4. 1. 6. 3. 4. 6. 3. The mean (T) aptitude score: (Please show your answer to 1 decimal place.) The median aptitude score: The mode aptitude score: (Please separate your answers by ',' in bimodal situation. Enter DNE if there is no mode.) Submit Question 51°F Cla 直 。Find the relative frequency for the class with lower class limit 27 Relative Frequency=____%
- Relative Frequency Histogram How would the shape of the histogram change if the vertical scale uses relative frequencies expressed in percentages instead of the actual frequency counts as shown here?Every year students are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This years's results were Aptitude Frequency 0 3 1 4 2 1 3 2 4 4 5 2 To one decimal The mean aptitude The median aptitude The mode aptitudeHigh temperature in a certain city for the month of July has a uniform distribution over the interval 7070 FF and 9090 FF What is the average temperature in this city in July (Enter only the numerical value)? What is the temperature which exceeded by the temperature on 90%days in July (Enter only the numerical value)?
