Given a population mean of 112, a standard deviation of 15, and an SRS of 50, determine a 95% confidence interval.

Z-int

The mean height for a group of aliens is 64.5 inches w/a st dev of 2.5. Find the probability that the mean height of an SRS of 10 aliens is 65.3 inches.

normalcdf or Z-Test

For a population with a mean of 78 and st dev of 8, find the margin of error for a 95% confidence interval using an SRS population of 20.

Z-int

If the standard deviation of x is 2, the standard deviation of y is 5, and the correlation coefficient between them is r = 0.8, determine the slope of the regression line.

If the population proportion is 0.8, and the population is 400, find the standard deviation of the proportion.

To 3 decimal places, find the z-score for a standard normal distribution for a 90% confidence interval.

invNorm

For a population with a mean of 78 and SAMPLE st dev of 8, find the margin of error for a 95% confidence interval using an SRS population of 20.

T-int

Question

Answer

TI-84 command

To 3 decimal places, find the z-score for a standard normal distribution for a 95% confidence interval.

invNorm

The mean of an approximately normal set of data is 12 and the standard deviation is 2.1. If an SRS of 6 is taken, find the sample standard deviation.

Given a population mean of 112, a SAMPLE standard deviation of 15, and an SRS of 50, determine a 95% confidence interval.

T-int

In a population of 5000 wombats, 800 are found to eat snarks. To 3 decimal places, find a 99% confidence interval for the proportion of wombats that eat snarks.

Z-int

What term is given for the standard deviation of a statistic estimated from data?

To 3 decimal places, find the z-score for a standard normal distribution for a 99% confidence interval.

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