Below is the data for the amount of time that Ralph and Sandra spent practicing this week. Use the chart to answer the questions.
What is the mean for Ralph?_______
What is the mean for Sandra?_______
Who is more consistent (use MAD)?_______
Question 5
5.
Mr. Nelson had a test and these are some of the scores below. Using the information below, answer each question. Round all answers to the nearest tenth.
1st Block: 65,78,90,82,95,50,82,50
What is the mean?_______
What is the mean absolute deviation? Round to the nearest hundredth._______
Question 6
6.
Mr. Jones had a test and these are some of the scores below. Using the information below, answer each question. Round all answers to the nearest tenth.
2nd Block: 65,78,90,82,95,100,82
What is the range?_______
What is the median?_______
What is the IQR?_______
Question 7
7.
You want to predict how many people in school usually do their homework. You conduct a survey of your class to get a sample. Is this biased or unbiased?
Question 8
8.
You want to know how many 7th graders at NGMS went to the beach over spring break. You conduct a survey of random 8th grade students to collect your data. Is this biased or unbiased?
Question 9
9.
Find the mean, median, mode, and range of the data set. Round your answer to the nearest hundredths place if necessary.
Mean = _______ Median = _______ Mode = _______ Range = _______
Question 10
10.
Find the lower quartile, upper quartile, and interquartile range for each data set. Round to the nearest tenth if necessary.