Find the geometric mean between 16 and 49?
965171
Geometric mean of x and y is sqrt(xy), so sqrt(16*49) = 28.
815956
An area of 0.99 has a z-szore of 2.33\n\nAll you have to do is to calculate the mean given the value of x, s and z.\n\nz = (x - mean)/s\nmean  = x - sz\nmean = 6 - (0.2)(2.33)\nmean = 5.534 oz.
1022203
The mean proportional is also known as geometric mean and is defined as (a1*a2*a3*...*an)^(1/n) for n numbers.\nTherefore for 2,3 and 4, the mean proportional is (2*3*4)^(1/3)\n=24^(1/3)\n=2.884
278272
You'll use Z-scores and the Z-table. Z-scores convert deviations to standard deviation units. \n\nIn this case, you're looking for the range of scores that makes up the middle 88% of the distribution - 44% on either side of the mean. \n\nThe z-score is 1.56 (look in the table for the z-score that cuts off 44% of the distribution.) This tells you that 44% of the scores fall between the mean and 1.56 standard deviation units above the mean - and 44% of all scores fall between the mean and 1.56 standard deviation units below the mean. \n\nNow, since each standard deviation unit in this particular distribution is 4ml (as per your question), 1.56 standard deviation units is equal to 1.56 x 4, which is equal to 6.24ml.\n\nBack to the problem - your range is 6.24 ml above and below the mean - which is 250ml - therefore the range of volumes is from 6.24ml less than 250 to 6.24ml more than 250 - or in other words - 243.76ml to 256.24 ml.\n\nHope that helped!
496349
I hope this isn't homework!\nx+y=94 \n2x-y=26 \n3x=120\nx=40\ny=54
47438
Take each of your values, and then subtract the mean from them.  E.g., 70 - 56 = 14, 60 - 56 = 4, etc.\n\nNow take each of these answers and square it.  Half of the starting numbers will be negative (eg 30 - 56 = -26) but once you square all of these numbers, they should all be positive.\n\nNow you'll have 7 positive numbers. Add them all together and divide the answer by 7.  Finally, take the square root of that value, and that's the standard deviation.\n\nSo 14, 4, -6, 4, 4, 9, and -26\nbecome 196, 16, 36, 16, 16, 81, and 676\nSummed together gives 1037\ndivided by 7 is ~148.14\nSquare-rooted is ~12.2\n\nThe standard deviation is 12.2.\n\nNOTE: the rt11guru answer that follows is based on a technique used in some larger sample sets where 1 is subtracted from the number of entries, ie the sum is divided by 7-1=6 rather than 7.  That is called the *sample standard deviation*, as shown in the link.
1136885
so your scores will look like\n11 12 13 13 15 15 15 15 16 16 17 17 17 18 18 18 19 19 19 19 20 20 20 20 20 20 21 21 21 22 22 22 22 23 23 23 23 24 25 25\n\nthere are 40 observations, so Q1 is the (41/4=10.25)th observation, which is somewhere between 16 and 17\nusing linear interpolation, Q1 is 16.25
815860
Hello Dear \n\n- Take " √ " of eachsides\n√16y^2 =  √ 25 \n± (4y = 5)\ny = ± 5/4\n\nGood Luck dear.
156633
the value you need is 12*12-4*9*16 = 144-576 = -432\n\nBecause it is negative, the equation has NO real solutions.
259191
Perimeter\ntwo sides are 8 and the other two sides are 16. \n\n8 times 2 is 16 and 16 times 2 is 32. \n\n16+32= 48(unit) \n\n                Area\njust multiply them:) \n\n8 times 16= 128(unit) squared\n\nDoes that help?
178476
Diameter is two times the radius.\n\nThey may want you to calculate the mean (average), median, or mode of the 12 values.\n\nIt would be best if you would give more details.
867445
9x²+16y²=144\n\nDifferentiate with respect to t\n18x * dx/dt + 32y * dy/dt = 0\nSo 18x * 4y + 32y * dy/dt = 0\nie dy/dt = - 72xy/32y\n= -9x/4\n\nd²y/dt² = -9/4*dx/dt = -9y = 0 for stationary points\nie y = 0 \n\nWhen y = 0, x = ±4\n\nSo maximum dy/dt = -9*(-4)/4 = 9\n(and minimum when dy/dt = -9*(4)/4 = -9)
775593
Load the Analysis Toolpak add-in and then use this formula, it's shorter:\n\n=A1/GCD(A1, B1)&":"&B1/GCD(A1, B1)
358099
0.43 & 0.0062\n\nDivide by 100
557080
Well if s^2=D^2/2 you can just plug in the value for D(56 cm) and get the value of s.\nSo s^2=56*56/2\ns^2=1568\ns=sqrt(1568)\ns=40cm
575173
thats a geometric sequence with a common ratio of -1... you can get the common ratio by getting the first set of differences... thats 10-12... 12-11.. 11-15.. 15-12... then have the first set of difference: -2 1 -4 3.. then get the second set of difference... -2-1.. 1--4... -4-3... and u get -1 -1.. thats how u get to chek if its a geometric sequence by checking if they have the same second diff... chek the net and search for the formula for solving geometric sequences cuz i forgot bout those already.. goodluck!
773196
Mean: 113\nMedian: 108-116\nMode: 108-116\n\nThe mean was the hard one, I actually took the middle score from each range (eg 90-98=94) and multipled it by the number of times it occured (eg 94x6=564) and added all 5 (564+2266+4816+3388+1170= 12204). Then divided it by the frequency (6+22+43+28+9=108). Total (12204/108= 113). It's impossible to find a mean of a set of ranges, you need exact figures.\n\nThe mode is the most commonly occuring range, the median is the central range. These figures can't be accurate without the full actual IQ scores. But based on the figures provided, the mean, median and mode are as I stated above. If you provide the exact figures I'll work out the exact mean, mode and median.