1. Statistics 1

2. Constructing a Frequency Distribution 1.Choose either individual data points or four to eight evenly spaced intervals (if there are several different values). 2.Tally the number of data point or each individual point or in each interval. 3.List the frequency of each individual data point or interval. 4.Find the relative frequency of each data point (or interval) by dividing the relative frequency by the total number of data points.

3. The university library randomly selected 30 students to ask the question “How many times per week do you come to the library?”. Their answers are as follows. 1 5211 4 2154 5 2512 3 4112 3 5412 2 4512 Create a frequency distribution for the above data.

4. Formulas mean of ungrouped data (here x is the data point) mean of grouped data (here x is the midpoint of a group)

5. Fran Tarkenton holds the all-time record in professional football for throwing touchdown passes. The number of touchdown passes (TDs) for each of his seasons is given in the table. Find the mean, median, and mode of the number of touchdown passes per year thrown by Tarkenton

6. YearTDsYearTDs 196118197019 196222197111 196315197218 196422197315 196519197417 196617197525 196729197617 19682119779 196923197825

7. Tom Ball, an avid jogger, kept detailed records of the number of miles he ran per week during the past year. The frequency distribution summarizes his records. Find the mean, median, and mode of the number of miles per week that Tom ran.

8. Miles run per week Number of weeks 05 14 210 39 4 57 63 74

9. If your scores on the first four exams in a class are 73, 67, 83, and 81, what score do you need on the next exam for your overall mean to be at least 70?

10. The mean salary of ten employees is $28,000, and the median is $25,000. The highest paid employee gets a $5,000 raise. a.What is the new mean salary of the ten employees? b.What is the new median salary of the ten employees?