Question: For a 99% confidence interval,z2= ____. For a 90% confidence interval,z2= ____. For a 98% confidence interval,z2= ____. For a 95% confidence interval,z2= ____. Options:

For a 99% confidence interval,z2= ____.

For a 90% confidence interval,z2= ____.

For a 98% confidence interval,z2= ____.

For a 95% confidence interval,z2= ____.

Options:

2.576

2.807

1.282

1.645

2.326

1.960

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