Data analysis Test

A bank's loan officer rates applicants for credit. The ratings can be described by a Normal model with a mean of 200 and a standard deviation of 50. What percentage ratings can be expected to be between 200 and 275?

• 43.31%

• 56.71%

• 38.61%

• 29.87%

Tags

CCSS.HSS.ID.A.4

The lengths of human pregnancies can be described by a Normal model with a mean of 268 days and a standard deviation of 15 days. What percentage of pregnancies will last at least 300 days?

• 1.64%

• 98.36%

• 12.34%

• 56.19%

Tags

CCSS.HSS.ID.A.4

A town's average snowfall is 48 inches per year with a standard deviation of 6 inches. Using a Normal model, what values should border the middle 50% of the model?

• 44 and 52 inches

• 42 and 54 inches

• 40 and 50 inches

• 40 and 60 inches

Tags

CCSS.HSS.ID.A.4

For a recent English exam, the mean was 73 points and the standard deviation was 9.2 points. Find the percent of scores over 85.

• 9.61%

• 90.39%

• 28.51%

• 75.31%

Tags

CCSS.HSS.ID.A.4

A standardized test has scores that can be described by a Normal model with a mean score was 100 points and a standard deviation of 10 points. What score is at the 25th percentile?

• 93.26

• 106.74

• 90.32

• 80

Tags

CCSS.HSS.ID.A.4

Kristen is investigating the opinions of students at her high school on the new school hours proposed by the school board. Which of the following is her population of interest?

• All members of the school board

• All teachers at her school

• All students at her high school

• All students in the school district

• All high school students in the state

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A teacher at a culinary arts school will conduct an experiment to investigate which of three methods of instruction works best in teaching students how to make a good pie crust. Each student in a group of 60 students will be randomly assigned to one of three methods: in-person demonstration by the instructor, watching a video, and reading a recipe. The students will be assigned so that each method will have 20 students. Each pie crust made will be judged on its taste and texture. What are the treatments of the experiment?

• The 60 students

• The three methods of instruction

• The 20 students within each group

• The scores on taste and texture

• The 60 pie crusts made

Tags

CCSS.HSS.IC.B.3

Which of the following is a benefit to using a random sample for an observational study?

• The random sample allows for different treatments to be assigned.

• A causal relationship can be determined.

• The results of the observational study can be generalized to the population.

• A random sample is the easiest method of data collection.

• The distribution of the sample will match the distribution of the population.

Tags

CCSS.HSS.IC.B.3

The president of a small company needs to collect data on the educational background of all 20 of the company’s employees. Which of the following is the best method to use for data collection?

• A census

• A cluster sample

• A simple random sample

• A stratified sample

• A systematic random sample

Tags

CCSS.HSS.IC.B.3

To estimate the size of a typical housing unit in a certain town, a sociologist plans to use a cluster sampling method to gather data. Which of the following describes a cluster sampling method?

• Randomly select a certain number of housing units in the town.

• Divide all housing units into three groups: small, medium, and large. Then randomly select a certain number from each group.

• Divide the town into nonoverlapping regions. Randomly select from the nonoverlapping regions, and select all housing units in those regions.

• Obtain a listing of all housing units currently for sale in the town, and use the size information given in the listing.

• Obtain the records kept by the town of all housing units in the town, and use the information in those records.

Tags

CCSS.HSS.IC.B.3