Making Inference from Random Samples

Maria records random speeds from three different Internet providers in the table. Which company offers the fastest mean downloading speed?

• CityNet

• Able Cable

• Tel-N-Net

• Impossible to determine from the information given

Litzy collects data from a random sample of 7th graders. Out of 40 respondents, 7 attend afterschool programs. Of the 200 7th graders attending Litzy's school, how many would be expected to attend afterschool programs?

• 14 7th graders

• 28 7th graders

• 35 7th graders

• 42 7th graders

Trinity surveys students in her computer class about time spent on computers by students in her school. Fill in the blank to explain why this is not a representative sample. This is not a representative sample because students in computer class are _________ to use computers than other students.

• less likely

• equally likely

• more likely

Camira is comparing the growth of plants using two different fertilizers. Which statements about the box plots are true? Select all that apply.

• The median is group B is greater.

• According to the IQR, the variability in Group B is greater.

• Group B contained the plant with the least amount of growth.

• Group B contained the plant with the most amount of growth.

• Group A has the greater median.

The dot plot shows a random sample of the number of fish caught and released by 30 participants during a two-day fishing tournament. Select the inference that can be made based on the data collected.

• On average, most participants caught and released 5 or more fish.

• More participants caught 6 fish than any other number.

• The same participants who caught and released 1 fish the first day caught and released 1 fish on the second day.

• On average, participants caught and released more fish on Day 2.

The captain of the basketball team wants to determine where the team should go for their end-of-season celebration. Which of the following is a representative sample? Select all that apply.

• The students in her homeroom

• Players whose names are randomly selected from a hat

• The players in the starting lineup

• All players over 5 feet tall

• Every 5th player selected from an alphabetical roster of the team

Which of the following measures of variability can be used to compare two data sets? Select all that apply.

• Mean

• Interquartile Range

• Median

• Range

• Mode

Ashley is comparing the distances that two electric cars can travel after the battery is fully charged. Based on the data, which car performs most consistently? Explain.

• Car A because the measures of center are smaller for Car A than for Car B.

• Car B because the measures of center are similar for Car B than for Car A.

• Car A because the measure of variability is smaller for Car A than for Car B.

• Car B because the measure of variability is smaller for Car B than for Car A.