Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. n = 195, x = 162; 95% confidence

At 95% confidence level the interval for the population proportion is (0.827 , 0.8345)

Step-by-step explanation:

Given:

Sample size (n) = 195

Successes in sample (x) = 162

Calculation :

production is,

if ,   ,

then the sample proportion have a normal distribution.

And the above condition is satisfied.

Therefore, at 95% confidence level the interval for the population proportion is,

At 95% confidence level the interval for the population proportion is (0.827 , 0.8345)

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all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true