6. (5 pts)City council survey. Match the followingA city council has requested a household survey be conducted in a suburban area of their city. Thearea is broken into many distinct and unique neighborhoods, some including large homes, some withonly apartments, and others a diverse mixture of housing structures. Match the appropriate samplingmethods.(1) Divide the city into neighborhoods, randomly sample 10 neighborhoods, and sample all house-holds from those neighborhoods.(2) Sample the 200 households closest to the city council oﬃces.(3) Randomly sample 50 households from the city.(4) Divide the city into neighborhoods, randomly sample 10 neighborhoods, and then randomly sam-ple 20 households from those neighborhoods.(5) Divide the city into neighborhoods, and sample 20 households from each neighborhood.(a) Simple random sampling.(b) Stratified sampling.(c) Cluster sampling. .(d) Multi-stage sampling.(e) Convenience sampling.Fill in the blanks - 2 points each (Total 10 points)For questions 7 to 11, fill in the blanks. Write legibly.7.(2)The difference between an observed and predicted response iscalled the.

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8.(2)All else equal, a 99% confidence interval isthan a 90% confidence interval.

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9.(2)An extraneous variable that is related to the explanatory and response variables and that preventsus from deducing causal relationships based on observational studies is called a.

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10.(2)The probability of rejecting the null hypothesis when the null hypothesis is false iscalled the.

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