If samples of size n = 65 had been used instead of n = 35, which of the following would be true?

The sample statistics would have less variability.

The sample statistics would have more variability.

The variability in the sample statistics would be about the same.

In a survey of 7,786 randomly selected adults living in Germany, 5,840 said they exercised for at least 30 minutes three or more times per week. Identify, with the proper notation, the quantity being estimated.

p = proportion of German adults who exercise for 30 minutes three or more times per week.

phat = the number of German adults who exercise for 30 minutes three or more times per week.

phat = proportion number of German adults who exercise for 30 minutes three or more times per week.

p = the number of German adults who exercise for 30 minutes three or more times per week.

In a recent Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. They also report that the "margin of sampling error is plus or minus 4%." What is the population of interest?

1,012 randomly selected U.S. adults

U.S. adults dissatisfied with K-12 education

U.S. adults satisfied with K-12 education

In a recent Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. They also report that the "margin of sampling error is plus or minus 4%." What is the sample being used?

1,012 randomly selected U.S. adults

U.S. adults dissatisfied with K-12 education

U.S. adults satisfied with K-12 education

In a recent Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. They also report that the "margin of sampling error is plus or minus 4%." What is the population parameter of interest, and what is the correct notation for this parameter?

p = proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12

phat =proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12

phat proportion of the sample of 1,012 randomly selected U.S. adults who are dissatisfied = 0.53

proportion of the sample of 1,012 randomly selected U.S. adults who are dissatisfied = 0.53

In a recent Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. They also report that the "margin of sampling error is plus or minus 4%." What is the relevant statistic?

phat proportion of the sample of 1,012 randomly selected U.S. adults who are dissatisfied = 0.53

phat =proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12

p = proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12

proportion of the sample of 1,012 randomly selected U.S. adults who are dissatisfied = 0.53

Find an interval estimate for the parameter of interest. Interpret it in terms of dissatisfaction in the quality of education students receive. Use two decimal places in your answer.

We are 95% sure that the true proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12 is between 0.49 and 0.57 (i.e., 49% and 57%)

We are 95% sure that the proportion of U.S. adults who reported being dissatisfied with the quality of education students receive in kindergarten through grade 12 is between 0.49 and 0.57 (i.e., 49% and 57%).

We are 95% sure that the proportion of U.S. adults who reported being dissatisfied with the quality of education students receive in kindergarten through grade 12 is between 0.51 and 0.55 (i.e., 51% and 55%).

We are 95% sure that the true proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12 is between 0.51 and 0.55 (i.e., 51% and 55%).

Math 168 Exam #2 Prep(chapter 3)

Authored by Robert Nieding

Mathematics

University

CCSS covered

Used 8+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Correlation between height and armspan (distance from fingertip to fingertip when arms are extended to the sides) for all players on the Chicago Bulls basketball team, using data from all players currently on the team

Parameter, Rho

Parameter, phat

Statistic , phat

Statistic, P

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Best point estimate we use to estimate correlation between height and armspan (distance from fingertip to fingertip when arms are extended to the sides) for all players on the Chicago Bulls basketball team, using data from all players currently on the team

Parameter, P

Parameter, mu

Statistic , r

Statistic, xbar

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does one dot on the sampling distribution represent?

one statistic from the population

one proportion , P, from the sample

one sample proportion from the original sample

nothing, just there to simulate the curve

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.IC.A.1

CCSS.HSS.ID.A.1

MATH RESPONSE QUESTION

2 mins • 1 pt

Estimate the population proportion from the dotplot.

Mathematical Equivalence

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

MATH RESPONSE QUESTION

2 mins • 1 pt

Estimate the standard error

Mathematical Equivalence

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.IC.A.1

CCSS.HSS.ID.A.4

MATH RESPONSE QUESTION

2 mins • 1 pt

Estimate the ME

Mathematical Equivalence

Tags

CCSS.6.SP.B.5C

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How likely is a phat value of 0.65?

Reasonably likely to occur from a sample of this size

Unusual but might occur occasionally

Extremely unlikely to ever occur

Impossible

Tags

CCSS.7.SP.C.5

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Math 168 Exam #2 Prep(chapter 3)

Correlation between height and armspan (distance from fingertip to fingertip when arms are extended to the sides) for all players on the Chicago Bulls basketball team, using data from all players currently on the team

Best point estimate we use to estimate correlation between height and armspan (distance from fingertip to fingertip when arms are extended to the sides) for all players on the Chicago Bulls basketball team, using data from all players currently on the team

What does one dot on the sampling distribution represent?

Estimate the population proportion from the dotplot.

Estimate the standard error

Estimate the ME

How likely is a phat value of 0.65?

If samples of size n = 65 had been used instead of n = 35, which of the following would be true?

In a survey of 7,786 randomly selected adults living in Germany, 5,840 said they exercised for at least 30 minutes three or more times per week.Identify, with the proper notation, the quantity being estimated.

In a survey of 7,786 randomly selected adults living in Germany, 5,840 said they exercised for at least 30 minutes three or more times per week.Using the correct notation, give the value of the best estimate of the population parameter. Round your answer to two decimal places.

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In a survey of 7,786 randomly selected adults living in Germany, 5,840 said they exercised for at least 30 minutes three or more times per week.
Identify, with the proper notation, the quantity being estimated.

In a survey of 7,786 randomly selected adults living in Germany, 5,840 said they exercised for at least 30 minutes three or more times per week.
Using the correct notation, give the value of the best estimate of the population parameter. Round your answer to two decimal places.