Stats Ch 19 - 26 Review

A dietitian wants to test if the mean sodium content in a brand of soup differs from the advertised 500 mg. A random sample of 10 cans was collected and sodium content recorded. What is the correct procedure?

• One Sample T Test for Mean

• One Sample Z Test for Proportion

• One Sample T Interval for Mean

• Two Sample T Test for Means

A researcher wants to know if the average hours of sleep on weeknights between college students and high school students differs. Two independent random samples were taken.

What is the correct procedure?

• Matched Pairs T Test for Means

• Two Sample T Test for Means

• Two Sample Z Test for Difference of Proportions

• One Sample T Test for Mean

A researcher wants to know if the average hours of sleep on weeknights between college students and high school students differs. Two independent random samples were taken.

What is the correct hypothesis

• H_o: μ₁=μ₂

  H_A: μ₁≠μ₂

• H_o: μ₁=μ₂

  H_A: μ₁>μ₂

• H_o: μ₁=μ₂

  H_A: μ₁<μ₂

• H_o: p₁=p₂

  H_A: p₁≠p₂

A polling organization wants to test whether the proportion of voters who support Candidate A differs from 0.5. They survey a random sample of 800 voters. Define the parameter.

• p̂=true sample proportion of voters who support Candidate A

• p= true population proportion of voters who support Candidate A

• μ=true population mean of voters who support Candidate A

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

A researcher believes a new medication decreases blood pressure. Ten patients' blood pressures are recorded before and after taking the medication. The researcher wants to test if there is evidence of a decrease.

What is the correct procedure?

• One Sample T Test for Mean

• Matched Pairs T Test for Means

• Two Sample T Test for Means

• Two Sample Z Test for Difference of Proportions

A sociologist wants to test if the mean age of residents in a city is greater than the national average of 37 years. A random sample of 50 residents is taken. Which is the correct parameter?

• μ= true population mean age of residents in the city

• p=true population proportion age of residents in the city

Tags

CCSS.6.SP.B.5B

A sociologist wants to test if the mean age of residents in a city is greater than the national average of 37 years. A random sample of 50 residents is taken. Which is the correct hypothesis?

• H_O: μ=37

  H_A: μ≠37

• H_O: μ=37

  H_A: μ>37

• H_O: μ=50

  H_A: μ>50

• H_O: μ=37

  H_A: μ<37

If you have a p-value of 0.003 at α=0.05, what would you conclude?

• Reject H_o

• Fail to Reject H_O

• She concludes the town's unemployment rate is not 9% when it actually is.

• She concludes the town's unemployment rate is not 9% when it actually is not.
  

• She concludes the town's unemployment rate is 9% when it actually is.
  

• She concludes the town's unemployment rate is 9% when it actually is not.
  

• The soil is actually safe and construction continues

• The soil is actually safe and construction stops

• The soil is actually unsafe and construction continues

• The soil is actually unsafe and construction stops