9. henri and terence drew samples of size 50 from a mystery bag. henri drew 42 red chips, and terence drew 40 red chips. find the margins of error for each student.

Henri’s margin of error = 0.104

Terence’s margin of error = 0.113

Step-by-step explanation:

It is given that Henri and Terence drew samples of size 50 from a mystery bag.

Formula for margin of error

          ... (1)

where, p is the proportion.

Henri drew 42 red chips out of 50.

Proportion of getting red chip =

Substitute p=0.84 and n=50 in equation (1).

Henri’s margin of error is 0.104.

Terence drew 40 red chips.

Proportion of getting red chip =

Substitute p=0.8 and n=50 in equation (1).

Terence’s estimated margin of error is 0.113.

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: