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Katarina [22]
3 years ago
13

A randomly selected sample of 100 students had an average grade point average (GPA) of 3.2 with a standard deviation of 0.2.

Mathematics
1 answer:
alexdok [17]3 years ago
5 0

Answer:

A. 0.020

Step-by-step explanation:

we calculate the standard error of the sample mean with the formula,

E=\frac{s}{\sqrt{n} },

with E= standard error of the sample mean

s= standard deviation

n= sample

So,

s= 0.2

n= 100

E=\frac{0.2}{\sqrt{100} } =\frac{0.2}{10}=0.02

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Jen picked 3/4 of a gallon of strawberries in half an hour.If she keeps picking strawberries at the same time, how many gallons
MrRa [10]

Answer:

Number of gallons of strawberries will she have picked in 2 hours is, 3

Step-by-step explanation:

Unit rate defined as the rate are expressed as a quantity of 1, such as 4 feet per second or 6 miles per hour, they are called unit rates.

Given the statement: Jen picked 3/4 of a gallon of strawberries in half an hour.

⇒ In \frac{1}{2} hour Jen picked  \frac{3}{4} gallon of strawberries.

Unit rate per hour = \frac{\frac{3}{4} }{\frac{1}{2}} =\frac{3}{4} \times \frac{2}{1} = \frac{6}{4} = \frac{3}{2}

To find the number of gallons will she have picked in 2 hours.

Number of gallons = unit rate per hours \times 2

                                      =\frac{3}{2} \times 2 = 3

Therefore, the number of gallons will she have picked in 2 hours is, 3

6 0
3 years ago
How do i work out 6x+6=0
VMariaS [17]

Answer: X= -1

Step-by-step explanation: In this equation you want to solve for "x"

You subtract 6-6=0 leaving "x" by itself. So the equation will look like this: 6x= -6

After this you want to divide by 6 to one side and to the other equaling "x" as -1

8 0
3 years ago
I need help with number 52! And I haven’t done 51
Wittaler [7]

Answer:

  51.  A/P = (2.2t +25)/(2.6t +29)

  52.  A/P for t=0 is about 0.862

         A/P for t=4 is about 0.858

Step-by-step explanation:

51. The ratio of the two given functions is ...

  r(t) = A/P

  r(t) = (2.2t +25)/(2.6t +29)

__

52. Fill in the required numbers and do the arithmetic.

  r(0) = (0 +25)/(0 +29) = 25/29

  r(0) ≈ 0.862

_

  r(4) = (2.2·4 +25)/(2.6·4 +29) = 33.8/39.4

  r(4) ≈ 0.858

The salary ratio is approximately flat at 0.86 over the 4-year period. It is declining slightly each year.

5 0
3 years ago
Amy runs a babysitting service she spends $14 per week on transporting and earns $65 per week after how many weeks will a beer a
dimulka [17.4K]
500<span> ≥ 51x 
(65-14 = 51 dollars a week)
500</span><span> ≥ 51x
/51
9.8 weeks -> round up you can't have .8 of a week... 10 weeks. 
Amy must work at least 10 weeks to make 500 dollars </span>
5 0
3 years ago
58/7 as a mixed number
iragen [17]
To convert an improper fraction into a mixed number, you must find how many times the denominator fits into the numerator cleanly. 
58/7
=8.385
It fits in 8 times.
8*7=56
58-56=2
There is a remainder of 2.

The Mixed number would be 8 2/7.

Hope this helps!
-Benjamin
8 0
3 years ago
Read 2 more answers
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