bell, population mean

bell, sample mean

circle, populations standard deviation

bell, sample standard deviation

Bell-shaped

Asymmetrical

Mean = Median = Mode

Data value center at the sample mean

Spread is determined by the sample standard deviation

A standardized normal distribution is known as z-distribution, which has a mean of  $\mu$  and a standard deviation of  $\sigma$  

A standardized normal distribution is known as t-distribution, which has a mean of 0 and a standard deviation of 1. 

Values above the mean have positive z-values and values below the mean have negative z-values.

None of the above

Z = 1

Z = -2

Z = 1.25

Z = -1.5

Z = 0

1

100%

0.5

0

Either one of the first two options is correct

$\mu\pm2\sigma\approx68.26\%$

$\mu\pm\sigma\approx95\%$

$\mu\pm2\sigma\approx95\%$

$\mu\pm3\sigma\approx99.73\%$

0.74751

0.25249

0.24751

0.53684

0.47359

0.56247

0.44453

0.33676

0.65561

0.24225

The population mean characterizes the spread of the normal distribution

The population mean characterizes the position of the normal distribution

The population standard deviation characterizes the position of the normal distribution

A normal distribution is asymmetrical around the population mean

Pretty good. I enjoyed it!

OK but more examples will be better

Not OK

Bad :(