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V125BC [204]
3 years ago
13

Suppose you are interested in determining if the average amount of money that students spend on food at your university per day

is greater than $30. You randomly choose 25 students from your campus and calculate that the mean amount of money spent per day is $18.01 with a standard deviation of $2.22. What is the standard error of the mean?
Mathematics
1 answer:
aivan3 [116]3 years ago
6 0

Answer:

<u>The standard error of the mean is 0.444</u>

Step-by-step explanation:

1. Let's review the information given to us for solving the question:

Size of the sample = 25

Mean amount of money spent per day = US$ 18.01

Standard deviation  =  US$ 2.22

2. For finding the standard error of the mean, we use the following formula:

Standard error = Standard deviation / √Size of the sample

Standard error = 2.22 / √25

Standard error = 2.22 / 5

<u>Standard error = 0.444</u>

3. Interpretation of the standard error:

The standard error is "the standard deviation of the population of values of a sample statistic in a repeated sampling or its estimate".

Thus, the potential for error in the reported result is not more than ± 0.444 (68% confidence) or no more than 1.96 times the standard error (0.444) = ± 0.87 (at 95% confidence).

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Can I pls get some help
Natali5045456 [20]

1,905.63 is the correct answer

5 0
2 years ago
Which answers are equal to the expression below? Check all that apply PLEASE WILL GIVE BRAINLIEST
kramer

Answer:

B., D., E.

Step-by-step explanation:

\sqrt{9} \cdot \sqrt{100} =

= \sqrt{9 \cdot 100}      This is choice B.

= \sqrt{900}          This is choice E.

= 30              This is choice D.

5 0
3 years ago
What is the value of s?3/8 (s 9 ) = −19?
denpristay [2]
S=<span>−<span>1.546727
hope this helps.</span></span>
8 0
3 years ago
The ratio of boys to girl in a school is 5:7 if there are 600 students, how many girls are there
larisa86 [58]

Answer:

350 girls

Step-by-step explanation:

So,

The secret to solving problems with ratios is to find the value of one unit.

5:7 = 12 units total

To find one unit, divide the total number of students by the total number of units.

600/12 = a

Simplify

50/1 = a

50 = a

The value of each unit is 50.

Now, multiply the units by the numbers in the ratio.

50(5) = b

250 = boys

50(7) = x

350 = x

There are 350 girls.

3 0
2 years ago
Kierston needs to paint a wall of the youth center. She knows that 1 can of paint covers an area of 2.2 square meters. Kierston
Step2247 [10]

Answer:

See Explanation

Step-by-step explanation:

Given

1\ can = 2.2m^2

Required

Determine the number of cans for the wall

The dimension of the wall is not given. So, I will use the following assumed values:

Length=20m

Width = 44m

First, calculate the area of the wall

Area = Length * Width

Area = 20m * 44m

Area = 880m^2

If 1\ can = 2.2m^2

Then x = 880m^2

Cross Multiply:

x * 2.2m^2 = 1 * 880m^2

x * 2.2m^2 = 880m^2

x * 2.2 = 880

Make x the subject

x = \frac{880}{2.2}

x = 400

400 cans using the assume dimensions.

So, all you need to to is, get the original values and follow the same steps

4 0
3 years ago
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