(A) 4/10 Progress Check Inferences (A)

1

Mrs. Raines wanted to compare the test scores of 2 of her classes. Using the information below, answer each question. Round all answers to the nearest tenth.
1st Block: 92, 85, 43, 100, 65, 78, 88, 92, 75
2nd Block: 86, 63, 95, 75, 92, 81, 87, 86, 95
What is the mean for 1st block?_______ 
What is the mean for 2nd block? _______ 
What conclusion can you make? Use statistical measures to support your answer. _______ 

1

Mrs. Raines wanted to compare the test scores of 2 of her classes. Using the information below, answer each question. Round all answers to the nearest tenth.
1st Block: 92, 85, 43, 100, 65, 78, 88, 92, 75
2nd Block: 86, 63, 95, 75, 92, 81, 87, 86, 95 
 
What is the IQR for 1st block? _______ 
What is the IQR for 2nd block? _______ 
Which class, 1st Block or 2nd Block,
 has more consistent test scores?_______ 

1

Which data set shows more variability?

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The given dot plot compares the number of hours in which students of a certain class study math and science per week.

Which of the following statements are true?

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Choose all statements that are true.

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The principal at Marina Middle School wants to determine if the 120 students in the seventh grade prefer to visit Catalina Island or Camp Mosaic for their end-of-year trip. Which of the following is a representative sample of the population? Select all that apply.

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When a sample does not accurately represent the population, it is a:

1

The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

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Which group of students is the least consistent in their travel times?

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Australia and Canada have similar variation in their travel times? Which one would you predict has greater travel time overall?

Required

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The table shows the number of contacts six people each have stored in their cell phone.

What is the mean absolute deviation for this set of data? (Hint: draw a chart!)

Which data set shows more variability?

The given dot plot compares the number of hours in which students of a certain class study math and science per week.Which of the following statements are true?

Choose all statements that are true.

The principal at Marina Middle School wants to determine if the 120 students in the seventh grade prefer to visit Catalina Island or Camp Mosaic for their end-of-year trip. Which of the following is a representative sample of the population? Select all that apply.

When a sample does not accurately represent the population, it is a:

The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

Which group of students is the least consistent in their travel times?

Australia and Canada have similar variation in their travel times? Which one would you predict has greater travel time overall?

The table shows the number of contacts six people each have stored in their cell phone.What is the mean absolute deviation for this set of data? (Hint: draw a chart!)

The given dot plot compares the number of hours in which students of a certain class study math and science per week.

Which of the following statements are true?

The table shows the number of contacts six people each have stored in their cell phone.

What is the mean absolute deviation for this set of data? (Hint: draw a chart!)