Scope of Inference

Question 1

In a large ball pit, 20% of the balls are red. You plan to jump in and randomly select 10 balls.Which statement is true?

Revolt · Accepted Answer

You will likely have one to three red balls in your sample.

Question 2

Using technology, the student simulated the sample percent of seniors that turned in their survey using 50 random samples of 10 students under the assumption that 20% of all seniors turned in their survey. Here are the results.

Revolt · Accepted Answer

. In this case, of the simulated sample means are , which is .: Yes; . In this case, of the simulated sample means are , which is .: 0 percent; . In this case, of the simulated sample means are , which is .: 60 percent or more; . In this case, of the simulated sample means are , which is .: less than 5 percent

Question 3

A onlyB only✔ Both A and BNeither A nor B

Revolt · Accepted Answer

✔ Both A and B

Question 4

✔ A onlyB onlyBoth A and BNeither A nor B

Revolt · Accepted Answer

✔ A only

Question 5

A only✔ B onlyBoth A and BNeither A nor B

Revolt · Accepted Answer

✔ B only

Question 6

A onlyB onlyBoth A and B✔ Neither A nor B

Revolt · Accepted Answer

✔ Neither A nor B

Question 7

When sampling, which of the following sample sizes will yield the smallest variability in results obtained from repeated sampling from the population?

Revolt · Accepted Answer

35

Question 8

Tessa conducts an experiment and obtains results that are statistically significant. What is meant by "statistically significant”?

Revolt · Accepted Answer

It means that the results that Tessa obtained are too unusual to be explained by chance alone.

Question 9

Is the sample mean time until blinking (x̄ = 36 seconds) statistically significant evidence that the true mean time that students can go without blinking is greater than 30 seconds? Use the results to answer the question.

Revolt · Accepted Answer

. In this case, of the simulated sample means are , which is .: Yes; . In this case, of the simulated sample means are , which is .: 3 percent; . In this case, of the simulated sample means are , which is .: 36 or more; . In this case, of the simulated sample means are , which is .: less than 5 percent

Scope of Inference Answers

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