Multiple Samples Assignment 100%

The proportion used to find the average number of trout you would expect to live in the pond is 7/20 = x/400. Solve the proportion to find the expected number of trout in the population. The expected number of trout in the population is

140

What is the ratio of the average number of catfish to the average number of all fish in the samples? 1:7 1:4 2:5 3:4

1:4

Sometimes populations change over time. Generate six samples for one year after the initial samples. Identify the ratio of the average number of bass to the average number of fish in the sample. 1:5 1:4 3:10 9:20

1:5

The mean number of catfish in all 6 samples is approximately 5.7. If 200 fish are in the pond, which proportion can be used to predict the number of catfish in the population?

5.7/20=x/200

Using six random samples, the average number of catfish in the samples was 5.7. If the total population of fish in the pond is 200, the proportion of catfish in the pond will be 5.7/20 = x/200. What is the predicted number of catfish in the pond?

57

Generate three more random samples of fish. What is the ratio of the average number of catfish to the average number of all fish in the samples?

6.33:20

Take two samples of fish from a pond and analyze the results. What is the average number of bass found in both samples? What is the ratio of the average number of bass to the average number of fish in each sample?

7 7/20

The table shows two samples of fish from a pond. If 400 fish are in the pond, which proportion represents the average number of bass you would expect to live in the pond?

7/20=x/400

A random survey asked two samples of 100 high school students how much time they spend on homework each night. Which inference is true? More students spend 0-30 minutes on homework than spend 31-60 minutes. More students spend 31-60 minutes on homework than spend 0-30 minutes. About the same number of students spend 0-30 minutes on homework as spend 31-60 minutes. More students spend 61-90 minutes on homework than spend 0-30 minutes.

About the same number of students spend 0-30 minutes on homework as spend 31-60 minutes.

A survey was conducted asking people about their favorite fruit. Which inferences about the population are true based on the data? Check all that apply. About twice as many people prefer apples as prefer bananas. Bananas are preferred much less frequently than apples or oranges. Exactly twice as many people prefer oranges as prefer apples. Exactly three times as many people prefer bananas as prefer oranges. The samples show little variation for each fruit.

About twice as many people prefer apples as prefer bananas. Bananas are preferred much less frequently than apples or oranges. The samples show little variation for each fruit.

Two samples of fish from a pond were analyzed. The second sample was taken six months after the first sample. Which are valid inferences? Check all that apply. The second sample shows the same amount of each type of fish in the pond. About twice as many trout were in the pond at the time the second sample was taken. About the same number of bass were found in the two samples. Fewer bass were in the pond at the time the second sample was taken. About the same number of catfish were found in both samples.

About twice as many trout were in the pond at the time the second sample was taken. Fewer bass were in the pond at the time the second sample was taken. About the same number of catfish were found in both samples.

In two sample surveys, 125 people were asked about their favorite fruit. In the first survey, 40 people chose apples, 64 chose oranges, and 21 chose bananas. In the second, 43 chose apples, 63 chose oranges, and 19 chose bananas. Marianne inferred that most people prefer oranges. Is this inference true based on the data? Explain.

Marianne made an inference that is true based on the data. More than half of the people surveyed in each sample chose oranges as their favorite fruit. Since most people in each sample chose oranges, it is likely that oranges are the favorite fruit of the entire population.

Six random samples were taken each year for three years. The table shows the inferred population for each type of fish for each year. Which conclusion is supported by the data from the multiple-year samples? Check all that apply. The number of bass increased over time. The number of bass decreased over time. The number of catfish increased over time. The number of catfish remained the same. The fish population decreased over time.

The number of bass decreased over time. The number of catfish increased over time.

For two years, two samples of fish were taken from a pond. Each year, the second sample was taken six months after the first sample. Make an inference about which fish increased its predicted average population from Year 1 to Year 2. All three types of fish increased their predicted average population. Trout increased its predicted average population. Bass increased its predicted average population. None of the fish increased their predicted average population.

Trout increased its predicted average population.

A random survey asked two groups of 100 women whether they wear shorts, long pants, or a dress most often. The results are shown in the table. Complete the sentence with a valid inference. For women, the most frequently worn item of clothing is

pants

Linda randomly surveyed 20 teachers at her school about whether they prefer chalkboards or dry erase boards. She repeated the survey three times with three different sets of teachers. Which pair of Linda's samples seems to have the lowest variability and, therefore, are representative samples?

samples 1 and 2

In this assignment, you will explore how to find the number of different species of fish in a pond by looking at a random sample of the fish. Which phrase best describes the total number of brook trout in the pond? the population of brook trout the proportion of brook trout the sample of brook trout the population of fish

the population of brook trout