1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
igomit [66]
3 years ago
15

The weather man predicted there would be 16 inches of snowfall. When measures, there was only 14 inches of snowfall. What percen

t was the weather man off by?
Mathematics
1 answer:
Crank3 years ago
4 0

Answer:80%

Step-by-step explanation:

You might be interested in
Find the product of 3 1 11 and 5 1 2 .
prohojiy [21]

Answer:

16896

Step-by-step explanation:

3×1×11×512

=16896

7 0
3 years ago
Read 2 more answers
How much $ do you make in an hour if you earn $42.25 in 6.5 hours?
mafiozo [28]
$6.50 per hour. 42.25/6.5=6.5
7 0
3 years ago
Write the pair of fractions as a pair of fractions with a common denominator
andrew-mc [135]
We would need the fractions given
5 0
3 years ago
The length of a tennis court is 10 feet shorter than 3 times its width x express and the perimeter of the tennis court in terms
Norma-Jean [14]

First, let's define our variables.


Let's call our width X(given)

and our length, since it's 10 shorter than 3 times the width, we can call our length:

3x-10

So, the perimeter of a rectange is equal to 2 times the length + 2 times the width.


So, when we plug our values in, we get

2(3x-10)+2x\\6x-20+2x\\8x-20

The perimeter is 8x-20


4 0
2 years ago
With a height of 68 ​in, Nelson was the shortest president of a particular club in the past century. The club presidents of the
Ivahew [28]

Answer:

a. The positive difference between Nelson's height and the population mean is: \\ \lvert 68-70.7 \rvert = \lvert 70.7-68 \rvert\;in = 2.7\;in.

b. The difference found in part (a) is 1.174 standard deviations from the mean (without taking into account if the height is above or below the mean).

c. Nelson's z-score: \\ z = -1.1739 \approx -1.174 (Nelson's height is <em>below</em> the population's mean 1.174 standard deviations units).

d. Nelson's height is <em>usual</em> since \\ -2 < -1.174 < 2.

Step-by-step explanation:

The key concept to answer this question is the z-score. A <em>z-score</em> "tells us" the distance from the population's mean of a raw score in <em>standard deviation</em> units. A <em>positive value</em> for a z-score indicates that the raw score is <em>above</em> the population mean, whereas a <em>negative value</em> tells us that the raw score is <em>below</em> the population mean. The formula to obtain this <em>z-score</em> is as follows:

\\ z = \frac{x - \mu}{\sigma} [1]

Where

\\ z is the <em>z-score</em>.

\\ \mu is the <em>population mean</em>.

\\ \sigma is the <em>population standard deviation</em>.

From the question, we have that:

  • Nelson's height is 68 in. In this case, the raw score is 68 in \\ x = 68 in.
  • \\ \mu = 70.7in.
  • \\ \sigma = 2.3in.

With all this information, we are ready to answer the next questions:

a. What is the positive difference between Nelson​'s height and the​ mean?

The positive difference between Nelson's height and the population mean is (taking the absolute value for this difference):

\\ \lvert 68-70.7 \rvert = \lvert 70.7-68 \rvert\;in = 2.7\;in.

That is, <em>the positive difference is 2.7 in</em>.

b. How many standard deviations is that​ [the difference found in part​ (a)]?

To find how many <em>standard deviations</em> is that, we need to divide that difference by the <em>population standard deviation</em>. That is:

\\ \frac{2.7\;in}{2.3\;in} \approx 1.1739 \approx 1.174

In words, the difference found in part (a) is 1.174 <em>standard deviations</em> from the mean. Notice that we are not taking into account here if the raw score, <em>x,</em> is <em>below</em> or <em>above</em> the mean.

c. Convert Nelson​'s height to a z score.

Using formula [1], we have

\\ z = \frac{x - \mu}{\sigma}

\\ z = \frac{68\;in - 70.7\;in}{2.3\;in}

\\ z = \frac{-2.7\;in}{2.3\;in}

\\ z = -1.1739 \approx -1.174

This z-score "tells us" that Nelson's height is <em>1.174 standard deviations</em> <em>below</em> the population mean (notice the negative symbol in the above result), i.e., Nelson's height is <em>below</em> the mean for heights in the club presidents of the past century 1.174 standard deviations units.

d. If we consider​ "usual" heights to be those that convert to z scores between minus2 and​ 2, is Nelson​'s height usual or​ unusual?

Carefully looking at Nelson's height, we notice that it is between those z-scores, because:

\\ -2 < z_{Nelson} < 2

\\ -2 < -1.174 < 2

Then, Nelson's height is <em>usual</em> according to that statement.  

7 0
3 years ago
Other questions:
  • Is the product of 10 over 3 bigger than 54
    5·1 answer
  • The population of a city was 177 thousand in 1992. The exponential growth rate was 1.3% per year. a) Find the exponential growth
    9·1 answer
  • A plane intersects a prism to form a cross section that is a polygon with five sides. The minimum number of sides that the polyg
    14·2 answers
  • a drawer contains 24 and forks. there are three times as many spoons as forks. how many spoons are in the drawer?
    15·2 answers
  • 5. Find the value of x. Any help is appreciated. Thanks! ^-^
    10·1 answer
  • Can't find the answer for when they arrived at the same time
    9·1 answer
  • If the sides of a cube are 4 inches long, then its volume is
    11·2 answers
  • There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 2 9 . There are 63 m
    5·1 answer
  • Quesu
    10·1 answer
  • The graph below represents the following system of inequalities.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!