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jenyasd209 [6]
3 years ago
12

A study will be conducted to investigate whether there is a difference in pain relief for two brands of headache pills, N and P.

Participants will be randomly assigned to one of two groups. One group will take pill N when they experience a headache, and the other group will take pill P when they experience a headache. Each participant will record the number of minutes it takes until relief from the headache is felt. The mean number of minutes will be calculated for each group. Which of the following is the appropriate test for the study?
a. A two-sample z-test for a difference between population proportions.
b. A two-sample t-test for a difference between population means.
c. A matched-pairs t-test for a mean difference.
d. A one-sample z-test for a population proportion
e. A one-sample t-test for a population mean
Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
6 0

Answer:

b.  TWO SAMPLE T TEST FOR POPULATION MEANS

Step-by-step explanation: the problem mentions difference and the mean number of minutes so you know it'll be a difference in population MEAN

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Emily can walk 3/4 of a mile in 1/4 of an hour.
ExtremeBDS [4]

Answer:

20 minutes

Step-by-step explanation:

Method 1:

(0.75)/(0.25)=(1)/(x)

0.75*1.333333=1, so multiply 0.25 by 1.333333 to find the value of x!

0.25*1.333333=0.33333, or one-third of an hour, or 20 minutes.

Method 2:

(0.75)/(0.25)=(1)/(x)

Cross-multiply

0.75x=0.25

(0.25)/(0.75)=x

x=0.33333 hours

3 0
3 years ago
The quotient of 82 and a number decreased by 26
Crazy boy [7]
Let n = the unknown number

"Quotient of 82 and a number" translates to 82 / n

"decreased by 26 tells you you're subtracting 26.

82/n - 26 or \frac{82}{n} - 26
4 0
3 years ago
Can someone please help me with this
alina1380 [7]

Answer:

Step-by-step explanation:

         x + 1  <  2

     x + 1 - 1 < 2 - 1           do the math by subtracting one from both sides

           x < 1

3 0
3 years ago
what is length of a rectangle that has a width of 2.5 centimeters and an area of 20.5 square centimeters?
lisov135 [29]
Area formula is = lx b

Whete we lnow area and width so

We can easily find out length

20.5 = 2.5 × l

l = 20.5 / 2.5

Length = 8.2 cm answer


Mark as brainliest if possible
8 0
3 years ago
Read 2 more answers
If the height of the triangle is 3 units more than the base, select the function that represents the area of the triangle.
vesna_86 [32]

For this case we have that by definition, the area of a triangle is given by:

A = \frac {1} {2} * b * h

Where:

h: It's the height of the triangle

b: It is the base of the triangle.

They tell us that the height of the triangle is 3 units more than the base. That means that if the base is "b" then the height is "b + 3". So, the area is:

A(b) = \frac {1} {2} * b * (b + 3)\\A(b) = \frac {1} {2} * b ^ 2 + 3b\\A(b) = \frac {b ^ 2 + 3b} {2}

ANswer:

Option C

4 0
4 years ago
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