Formulas and Functions Help
- Welcome
- Intro to formulas and functions
-
- ACCRINT
- ACCRINTM
- BONDDURATION
- BONDMDURATION
- COUPDAYBS
- COUPDAYS
- COUPDAYSNC
- COUPNUM
- CUMIPMT
- CUMPRINC
- CURRENCY
- CURRENCYCODE
- CURRENCYCONVERT
- CURRENCYH
- DB
- DDB
- DISC
- EFFECT
- FV
- INTRATE
- IPMT
- IRR
- ISPMT
- MIRR
- NOMINAL
- NPER
- NPV
- PMT
- PPMT
- PRICE
- PRICEDISC
- PRICEMAT
- PV
- RATE
- RECEIVED
- SLN
- STOCK
- STOCKH
- SYD
- VDB
- YIELD
- YIELDDISC
- YIELDMAT
-
- AVEDEV
- AVERAGE
- AVERAGEA
- AVERAGEIF
- AVERAGEIFS
- BETADIST
- BETAINV
- BINOMDIST
- CHIDIST
- CHIINV
- CHITEST
- CONFIDENCE
- CORREL
- COUNT
- COUNTA
- COUNTBLANK
- COUNTIF
- COUNTIFS
- COVAR
- CRITBINOM
- DEVSQ
- EXPONDIST
- FDIST
- FINV
- FORECAST
- FREQUENCY
- GAMMADIST
- GAMMAINV
- GAMMALN
- GEOMEAN
- HARMEAN
- INTERCEPT
- LARGE
- LINEST
- LOGINV
- LOGNORMDIST
- MAX
- MAXA
- MEDIAN
- MIN
- MINA
- MODE
- NEGBINOMDIST
- NORMDIST
- NORMINV
- NORMSDIST
- NORMSINV
- PERCENTILE
- PERCENTRANK
- PERMUT
- POISSON
- PROB
- QUARTILE
- RANK
- SLOPE
- SMALL
- STANDARDIZE
- STDEV
- STDEVA
- STDEVP
- STDEVPA
- TDIST
- TINV
- TTEST
- VAR
- VARA
- VARP
- VARPA
- WEIBULL
- ZTEST
CONFIDENCE
The CONFIDENCE function returns a value for creating a statistical confidence interval for a sample from a population with a known standard deviation. All arguments are number values.
CONFIDENCE(alpha, stdev, sample-size)
alpha: The probability that the true population value lies outside the interval. alpha must be greater than 0 and less than 1. Subtracting the confidence interval from 1 yields the alpha.
stdev: The standard deviation of the population. stdev must be greater than 0.
sample-size: The size of the sample. sample-size must be greater than 0.
Notes
The confidence estimate assumes that values in the sample are normally distributed.
Examples |
|---|
=CONFIDENCE(0.05, 1, 10) returns 0.619795032304561. If the mean of the sample values is 100, then with 95% confidence the population mean falls in the range 99.38–100.62. =CONFIDENCE(0.1, 1, 10) returns 0.520148387875558. If the mean of the sample values is 100, then with 90% confidence the population mean falls in the range 99.48–100.52. =CONFIDENCE(0.05, 1, 20) returns 0.438261270288291. =CONFIDENCE(0.05, 1, 30) returns 0.357838828743431. =CONFIDENCE(0.05 ,1, 40) returns 0.309897516152281. |