S2 Edexcel IAL Sampling Distributions and Hypothesis Tests

S2 Edexcel IAL Sampling Distributions and Hypothesis Tests

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Multiple Choice

Complete the definition:

A _______ is a subset of a population

• sample

• group

• people

• statistics

Multiple Choice

Complete the definition:

A _________ consists of all subjects (human or otherwise) that are being studied

• Statistics

• Number

• People

• Population

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Multiple Choice

Which of the following is the FIRST step of a hypothesis test?

• Check assumptions & conditions
• Find your test statistic
• State your conclusion
• State your null & alternative hypotheses

Multiple Choice

The null and alternative hypothesis can be the same.

• Yes

• No

• Maybe

• All the above

Multiple Choice

What is the only option for the null hypothesis? 

• H₀ = k
• H₀ > k
• H₀ < k
• H₀ ≠ k

Multiple Choice

Which of the following is not an option for an alternate hypothesis?

• H₁ = k

• H₁ > k

• H₁ < k

• H₁ ≠ k

Multiple Choice

Which of the following represents the appropriate null & alternative hypotheses?

The mean height of women is greater than 64"

• H₀: μ > 64"

  Hₐ: μ ≠ 64"

• H₀: μ = 64"

  Hₐ: μ > 64"

• H₀: p > 64"

  Hₐ: p ≠ 64"

• H₀: p = 64"

  Hₐ: p > 64"

Multiple Choice

Identify the correct null hypothesis:

Is the proportion of babies born male different from 50%? In a sample of 200 babies, 96 were male. Test the claim using a level of significance of 1%.

• H₀: p = 0.50

• H₀: µ = 100

• H₀: p = 0.48

• H₀: µ = 96

Multiple Choice

The claim being assessed in a hypothesis test

• Null hypothesis
• Alternative hypothesis
• P-Value
• Parameter

Multiple Choice

Identify the correct null hypothesis:

Is the proportion of babies born male different from 50%? In a sample of 200 babies, 96 were male. Test the claim using a level of significance of 1%.

• H₀: p = 0.50

• H₀: µ = 100

• H₀: p = 0.48

• H₀: µ = 96

Multiple Choice

At the Chrysler manufacturing plant, there is a part that is supposed to weigh precisely 19 pounds. The engineers take a sample of parts and want to know if they meet the weight specifications. What are our null and alternative hypotheses?

• H_o : μ = 17

  H₁ : μ ≠ 19

• H_o : μ = 19

  H₁ : μ ≠ 19

• H_o : μ = 19

  H₁ : μ ≠ 17

• H_o : μ = 17

  H₁ : μ ≠ 17

Multiple Choice

The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weigh 18.4 lbs. What is the null and alternate hypothesis?

• H₀: μ = 18.4

  H₁: μ = 18.4

• H₀: μ = 18.4

  H₁: μ > 18.4

• H₀: μ = 18.4

  H₁: μ < 18.4

• H₀: μ = 18.4

  H₁: μ ≠ 18.4

Multiple Choice

H₀: μ = k

H₁: μ ≠ k

• Left-tailed test

• Two-tailed test

• Right-tailed test

Multiple Choice

A P-value indicates:

• the probability that the null hypothesis is true

• the probability that the alternative hypothesis is true

• the probability of the observed results given the null hypothesis is false

• the probability that the null is true given the observed results

Multiple Choice

Suppose the P-value for a hypothesis test is 0.0304. Using a = 0.05, what is the appropriate conclusion?

• a) reject the null, the probability of getting results like this given the null is true is 3.04% which is less than 5%.

• b) reject the alternative, the probability of getting results like this given the alternative is true is 3.04% which is less than 5%.

• c) Accept the null, a 3.04% chance is really not that bad.

• d) Fail to reject the alternative but still don't accept the null.