Final answer:
To create a frequency distribution for the given unit 1 exam scores, organize them into intervals and count the scores within each. The mean score is the sum of all scores divided by the number of scores. The median is the middle score in the ordered list, and the standard deviation measures the spread of scores around the mean.
Step-by-step explanation:
To put the following unit 1 exam scores into a frequency distribution, we first need to organize the scores into intervals and then count how many scores fall into each interval. This gives us a better picture of how the scores are spread out. Based on the scores 34, 55, 99, 87, 86, 92, 67, 77, 73, most of the data is clustered between 70 and 89. We can create a frequency distribution table with appropriate ranges for this set of data.
The mean score is calculated by summing all the scores and dividing by the total number of scores. In this case, the calculation would be (34 + 55 + 99 + 87 + 86 + 92 + 67 + 77 + 73) / 9, which gives us the mean.
The median score is the middle value when the scores are arranged in ascending order. If there is an even number of scores, the median would be the average of the two middle numbers.
To calculate the standard deviation, we first find the mean, then calculate the variance by averaging the squared differences from the Mean, and taking the square root of the variance gives us the standard deviation.