Grace's Math 120

Keyboard works too. Use ^ for powers. Factorial uses a whole number from 0 through 170.

Enter a list of numbers Optional matching frequency list

Separate values with commas or spaces. Leave frequency blank for a regular list. Sx is for a sample. sigma x is for a population.

Count n / N—

Mean x-bar / mu—

Median—

Mode—

Sample Sx—

Population sigma x—

Q1 / Q3—

Min / Max—

Paired data: LinReg(ax+b)

x list y list Enter matching x and y lists.

Counting: nCr / nPr

n r

Binomial: binompdf / binomcdf

n p x

Normal: normalcdf

Lower Upper Mean mu Std. dev. sigma

Leave the lower box blank for -infinity or the upper box blank for +infinity.

Inverse normal: invNorm

Area left Mean mu Std. dev. sigma

Choose a tool and enter the values.

Intervals estimate. Tests check a claim. Pick the tool that matches the problem.

1-PropZInt · proportion interval

Yes count x Sample size n Confidence

Enter x, n, and the confidence level.

TInterval · mean interval

Sample mean x-bar Sample SD s Sample size n Confidence

Enter the sample summary.

T-Test · one mean

Claimed mean mu0 Sample mean x-bar Sample SD s Sample size n Alternative H1

Enter the null claim and sample summary.

1-PropZTest · one proportion

Claimed proportion p0 Yes count x Sample size n Alternative H1

Enter p0, x, n, and the direction of H1.

2-SampTTest · two means

Mean 1 SD 1 n1 Mean 2 SD 2 n2 Alternative H1

This uses the unpooled (Pooled: No) method.

Enter both sample summaries.