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irinina [24]
3 years ago
7

Suppose you have a normally distributed set of data pertaining to a standardized test. The mean

Mathematics
1 answer:
lina2011 [118]3 years ago
7 0
<span>The formula to find the z score in a normally distributed set of data is: z = (x - ÎĽ) / Ď With ÎĽ being the mean, Ď being the standard deviation, and x being the score. Substituting these values into the formula gives us z = (800 - 500) / 100 = 3 The z-score of the 800 point score is 3.</span>
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sonja wants to have $14000 in 13 years. calculate how much she should invest now at 6% interest, compounded semiannually in orde
mariarad [96]
She should invest $6491.73.

The equation we use to solve this is in the form
A=p(1+\frac{r}{n})^{nt}, 
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A in our problem is 14000.
p is unknown.
r is 6% = 6/100 = 0.06.
n is 2, since it is compounded semiannually.
t  is 13.

14000=p(1+\frac{0.06}{2})^{13*2}&#10;\\&#10;\\14000=p(1+0.03)^{26}&#10;\\&#10;\\14000=p(1.03)^{26}&#10;\\&#10;\\\text{Dividing both sides by }1.03^{26}\text{, we have}&#10;\\&#10;\\\frac{14000}{1.03^{26}}=\frac{p(1.03)^{26}}{1.03^{26}}&#10;\\&#10;\\6491.73\approx p
5 0
3 years ago
If brownies are baked in a pan measuring 13 inches long by 9 inches
nataly862011 [7]

Answer:

The brownies will be a little thicker in a 9 x 13” pan. 8 x 8= 64 square inches, doubled that's 128. 9 x 13= 117

Step-by-step explanation:

3 0
2 years ago
Six women push grocery carts up a ramp as shown.
Arturiano [62]
Six women push grocery carts up a ramp as shown.



2 carts weigh 50 lbs. each.

4 carts weigh 20 lbs. each.

How much work was done?

_____________ ft.-lbs. (total work)

6 0
3 years ago
A sample of human brain volumes ​(cm3​) is given below. Use the given data values to identify the corresponding z scores that ar
jeka57 [31]

Answer:

Step-by-step explanation:

We have A sample of human brain volumes (cm3) is obtained from those listed in Data Set 6: 1272, 1051, 1079, 1034, 1070, 1173, 1079, 1067.

We need to identify the corresponding z scores that are used for a normal quantile plot, then identify the coordinates of each point in the normal quantile plot. Construct the normal quantile plot, then determine whether the data appear to be from a population with a normal distribution.

The given data in Ascending order

1034 1051 1067 1070 1079 1079 1173 1272

Manual Construction of a Normal Quantile Plot:

First sort the data by arranging the values in order from lowest to highest.

With a sample of size n, each value represents a proportion of 1/n of the sample. Using the known sample size n, identify the areas of 1/2n, 3/2n, 5/2n, 7/2n, and so on. These are the cumulative areas to the left of the corresponding sample values.

Use the standard normal distribution to find the z scores corresponding to the cumulative left areas found in (These are the z scores that are expected from a normally distributed sample.)

5 0
3 years ago
Which expression is equal to 3(5 + 6)?
Alina [70]
D. 15+18 Hope that helps!
6 0
3 years ago
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