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

• Parameter, P

• Parameter, phat

• Statistic , phat

• Statistic, P

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

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

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.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.1

Estimate the population proportion from the dotplot.

Mathematical Equivalence

ON

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.1

Estimate the standard error

Mathematical Equivalence

ON

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

Estimate the ME

Mathematical Equivalence

ON

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

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.HSS.IC.A.1

CCSS.HSS.ID.A.4

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 more variability.

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

• The sample statistics would have less variability.

• Nothing would change

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

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.

• 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.

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

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

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.

Mathematical Equivalence

ON

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4