Monday
November 24, 2014

Posts by Melba


Total # Posts: 24

college statistics
assume the population of heights of female college students mean of 64.37 inches standard deviation of 6,26 in and random sample of 74 find p(x>65.25)B. find p(x>65.25)c. why is formulas required to solve a different than c.
June 14, 2012

college ststistics
given x is a noramlly distributed random variable with a mean of 28 and a sd of 7 find p(x<28)
June 11, 2012

college statistics
consider a population with a mena =51.6 and a sd=5.9 (A) calculate the z score for x= 50.5 from a sample of size 47. (b) could this z score be used in calculating probabilities using table 3 in appendix b in text book ahy or ahy not
June 9, 2012

college statistics
find the normal approximation for the binomial probability that x=5 where n=14 and p=0.3 compare this to the value of p(x=5) found in table 2
June 5, 2012

college ststistics
given x =237 u =2.00 and s=12.3 find z
June 4, 2012

college ststistics
find area under the standard normal curve A). p(z>0.58) B. p(-1.10<z<0)C. P(-1.60>=<z<2.09)
June 3, 2012

college ststistics
A. find the binomial probability p(x=5) where n=14 and p=0.30. B. setup without solving the binomial probability p(x is at most 5) using probability notation C. how would you find normal approximation to the binomial probability p(x=5) in part A. please show how you would ...
June 3, 2012

college statistics
a set of data is normally distributed with a mean of 1000 and a standard deviation of 100.what would be standard score for a score of 900.what percent of scores is betyween 1000 and 900.what would be percentile rank for a score of 900.
June 3, 2012

college statistics
construct a scatterplot for x,y values x 1 2 3 4 5 y 0.5 0.0 -0.5-1.0-1.5 what would be the slope of this regression line would the correlation between xand y be postive oe negative how would you interpret these data in terms of regression
May 26, 2012

college statistics
if the correlation co-efficient is o.32 what is the sign of the slope regression line as the correlation co efficient decreases from 0.78 to 0.71 do the oints of the scatter plot move toward the regression line or away from it
May 26, 2012

statistics college
SATI SCORES AROUND THE NATION HAVE A MEAN SCORE AROUND 500 A STANDARD DEVIATION OF ABOUT 100 POINTS AND ARE APPROXIMATELY NORMALLY DISTRIBUTED A PERSON WHO SCORES A PERFECT SCORE OF 800 ON THE SAT I HAS APPROXIMATELY WHAT PERCENTILE RANK WITHIN THE POPULATION
May 22, 2012

statistics college
find the range standard deviation and variance for following sample data 2,11,81,29,22,59,78,71,21,43,99,12,38,74,56,81
May 22, 2012

statistics college
suppose we have a set of blood pressure set with a mean of 120 systolic and a sample standard deviation of 20 points assume a normal distribution of what two values should 95% of all systolic bp lie
May 22, 2012

statistics
determine if this statistical study is descriptive or inferential a study finds that 51% of registered voters favor candidate x over candidate y
May 15, 2012

algebra2
simplify the following quotient of complex numbers into the form of a+bi -9+8i/1+2i
March 5, 2012

college algebra
-4x^2y(-4x^3y^5)
July 21, 2011

MGT 330
List at least three reasons why workers might be more satisfied with their jobs than in the past. The post should include at least one reason why you think workers may be more motivated by job security rather than salary and benefits in difficult economic times.
April 17, 2011

cal
Equations of the tangent lines to hyperbola xy=1 that pass through point (-1,1) I know the graph of y=1/x but not sure about the tangent lines at given point. Are the lines tangent to (1,1) and (-1,-1)? You're correct, the graph is y=1/x, so find y' to get the slope at...
September 26, 2006

science
A swimming pool contains 155m3 of water. If water must be heated from 16C to 32C. How many Joules of heat energy must be supplied? 1 cal=4.184 J Do I need to convert 155m3 to weight? yes. Then mass x 4.184 J/g*c x (Tfinal-Tinitial)= heat energy required. Yes DrBob, my problem ...
September 26, 2006

calc
standard equation of circle concentric with X^2+Y^2-2X-8Y+1=0 and tangent to line 2X-Y=3 Complete the squares to find the center of the circle. X^2+Y^2-2X-8Y+1=0 (x-1)^2+(y-4)^2 - 16 =0 The center is (1,4) and the radius for the given circle is 4. Now find the distance from (1...
September 26, 2006

chem
What volume of a 0.2 N NaoH solution do you expect to use in order to titrate 25ml (sample out of 250ml) of a 0.200 N oxalic acid solution? heeeelp! Equation is H2C2O4 + 2NaOH==> 2H2O + Na2C2O4 I assume that is 25.00 mL H2C2O4. milliequivalents(meq) NaOH = meq H2C2O4 25 mL ...
September 26, 2006

calc
standard equations of circles that have centers on line 5x-2y=-21 and are tangent to both axis. Any ideas?? First express the line as in point slope form y=(5/2)x - 21/2 The center must be on the line, so it is a point expressed as (x,(5/2)x - 21/2) In order for the circle to ...
September 26, 2006

Chem Lab
d = m/v 1.01=m/6.80 ml m=6.868gr coefficients of reaction: 2,2,1 two moles of H2O2 produce 1 mole of O2(g) then 6.868gr of H202 should produce...? I try .1009524929 and .2019049859 but they are not the right values...help...I am stuck... See answer I posted to the original ...
September 25, 2006

lab
Number of moles of oxygen gas produced from the complete catalyzed decomposition of 6.80ml sample of a 3.5% solution. Density of the 3.5% solution of H2O2 is 1.01g/ml Let's find out what you know about this and work from there. Show your calculations to the point that you ...
September 25, 2006

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