population and sampling 7th statistics

A group of randomly selected Limestone Middle School students were asked their favorite color.  6 of the 25 students said their favorite color is orange.  Based on the survey, what is the most reasonable estimate for the number of the 525 Limestone Middle School students whose favorite color is orange? (Do not include a label on your answer.)

Tags

CCSS.7.RP.A.2C

Greg recorded the number of books read by students.  A sample of the data is below.   What is the sample mean of this data?

Tags

CCSS.6.SP.B.5C

The mean number of hours spent on Khan Academy for a sample of 10 seventh grade students is 2.1.  Fa second random sample of 10 seventh grade students have a mean of 2.4 hours for the same month. This is called _______.

Tags

CCSS.6.SP.A.3

You want to know what is the favorite sport of 7th graders at CB. You ask 7th graders who play a sport to participate to go to the office 5th period to participate in the survey. This is a...

• Biased sample

• Unbiased sample

  (random sample)

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A teacher puts all her students' names in hat, then selects 3 names from the hat. These students will take a standardized test.

• Convenience

• Systematic

• Stratified

• Simple Random

Tags

CCSS.HSS.IC.B.3

The circle graph at the right shows the results of a survey in which students were asked their favorite sport.  Which is a part-to-part comparison of students whose favorite sport was softball to students whose favorite sport was hockey?

• The students are two times more likely to prefer football over hockey.

• The students are two times more likely to prefer softball over hockey.

• The students are two times more likely to prefer hockey over softball.

• The students are three times more likely to prefer hockey over softball.

Tags

CCSS.8.SP.A.4

Which of the following methods would be appropriate for choosing a random sample of ten students from the 7^th grade?

• Choose 10 students from your lunch table.

• Get a print out of all the students in 7^th grade and choose every 10^th student.

• Assign every student a number and use a random number generator to select 10 numbers.

• Choose the first 10 students to get to your PE class.

Tags

CCSS.HSS.IC.B.3

The graph makes it appear that Cy Young had 3 times as many wins as Jim Galvin. Is this a valid conclusion?

• Yes, because Young did have 3 times as many wins as Jim Galvin.

• No, because Young only had about 150 more wins

Tags

CCSS.3.MD.B.3

Double Dot Plot

• A sample drawn in a way where one or more parts of a population is favored or others

• An unbiased sample where each item or person of a population have an likely chance to be chosen as any other

• A method of visually displaying the distribution of two set of data values, where each value is shown as dots above a number line

• The study of collecting, organizing, and interpreting data

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

At Centre Middle School, the 7th graders will conduct a survey to decide where they want to go on a field trip. Which method will result in an unbiased decision?

• to randomly ask 8th grade students who went on a field trip last year

• to randomly choose some 7th grade students to select a location

• to ask all 7th grade teachers and administrators for a location

• to ask the Beta Club to choose a location

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1