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Confidence Interval of a Proportion
Given N, n, and a confidence percentage, this will calculate the estimation of confidence interval for the population proportion π including the margin of error

Confidence Interval/Hypothesis Testing for the Difference of Means
Given two large or two small distriutions, this will determine a (90-99)% estimation of confidence interval for the difference of means for small or large sample populations.
Also performs hypothesis testing including standard error calculation.

F Test Statistic
Calculates the F-test statistic for two populations

Ordered and Unordered Partitions
Given a population size (n) and a group population of (m), this calculator determines how many ordered or unordered groups of (m) can be formed from (n)

Population Growth
Determines population growth based on an exponential growth model.

Ratios
* Simplifies a ratio of a:b
* Given a ratio in the form a:b or a to b, and a total population amount, this calculator will determine the expected value of A and B from the ratio.


Sample Size Reliability for μ
Given a population standard deviation σ, a reliability (confidence) value or percentage, and a variation, this will calculate the sample size necessary to make that test valid.

Sample Size Requirement for the Difference of Means
Given a population standard deviation 1 of σ1, a population standard deviation 2 of σ2 a reliability (confidence) value or percentage, and a variation, this will calculate the sample size necessary to make that test valid.

Survival Rates
Given a set of times and survival population counts, the calculator will determine the following:
Survival Population lx
Mortality Population dx
Survival Probability px
Mortality Probability qx
In addition, the calculator will determine the probability of survival from tx to tx + n


In 1910, the population of math valley was 15,000. If the population is increasing at an annual rate
A city has a population of 240,000 people. Suppose that each year the population grows by 8%. What w
Find Mean 106 and standard deviation 10 of the sample mean which is 25
Find Mean and standard deviation
The population of goats on a particular nature reserve t years after the initial population was sett
a confidence interval for a population mean has a margin of error of 0.081
Solve the problem
Find Requested Confidence Value
data below consists of the pulse rates (in beats per minute) of 32 students. Assuming ? = 10.66,
HELP SOLVE
HELP SOLVE
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Height and weight are two measurements used to track a child's development. TheWorld Health Organiza
A random sample of 144 with a mean of 100 and a standard deviation of 70 is known from a population
A random sample of n = 10 flash light batteries with a mean operating life X=5 hr. And a sample stan
A professor assumed there was a correlation between the amount of hours people were expose to sunlig
In order to test if there is a difference between means from two populations, which of following ass
Determine ux and sigma(x) from the given parameters of the population and sample size u = 76, sigma
Construct a confidence interval of the population proportion at the given level of confidence. x = 1
The IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. a) What i
A random sample of 100 light bulbs has a mean lifetime of 3000 hours. Assume that the population sta
Bangladesh, a country about the size of the state of Iowa, but has about half the U.S population, ab
A city has a population of 240,000 people. Suppose that each year the population grows by 7.25%. Wha
A wildlife reserve has a population of 180 elephants. A group of researchers trapped 60 elephants an
A town has a population of 12000 and grows at 5% every year. What will be the population after 12 ye
A city has a population of 260,000 people. Suppose that each year the population grows by 8.75% . W
A hypothetical population consists of eight individuals ages 14,15,17,20,26,27,28, and 30 years. Wh
In 2016 the geese population was at 750. the geese population is expected to grow at a rate of 12% e
population MEAN OF ENVIRONMENTAL SPECIALIST SALARY IS $62000.A RANDOM SAMPLE OF 45 SPECIALIST IS DRA