Sample Proportion and Hypothesis Testing

Calculating mean and median

Inference procedures for one proportion

Understanding standard deviation

Learning about regression analysis

1000

2000

500

1500

0.60

0.44

0.30

0.50

Sample variance

Sample mean

Population mean

Population proportion

Square root of (P hat * (1 - P hat) / N)

P hat / N

P hat * N

Square root of (N / P hat)

1.64

1.96

1.28

2.58

95% of the sample approves

The true proportion is between 40.9% and 47.1%

95% of the population approves

The sample proportion is exactly 0.44

P = 0.5

P < 0.5

P > 0.5

P = 0.44

P < 0.5

P > 0.5

P = 0.44

P = 0.5

Using the population mean

Using the sample mean

Using the sample proportion

Using the hypothesized value of P