Help please I’ll give you brainlyst

Answer:

The 95% confidence interval = (98.225, 98.655)

Step-by-step explanation:

The formula for Confidence Interval =

Mean ± z × standard deviation/√n

Where Mean = 98.44°F

Standard deviation = 0.30°F

n = number of samples is 10

Because our number if samples is small, we use the t score confidence interval formula

Mean ± t × standard deviation/√n

Degrees of Freedom = n - 1

= 10 - 1 = 9

We find the t score of 95% confidence interval and degrees of freedom 9

= 2.262

Hence,

Confidence interval = 98.44 ± 2.262 × 0.30/√10

= 98.44 ± 0.214592162

Confidence Interval

98.44 - 0.214592162

= 98.225407838

≈ 98.225

98.44 + 0.214592162

= 98.654592162

≈ 98.655

The 95% confidence interval = (98.225, 98.655)

The 95%  confidence interval for the mean of all body temperatures  is [98.2255, 98.6545] (in degree Fahrenheit)

If the sample size is given to be n < 30, then for finding the confidence interval for mean of population from this small sample, we use t-statistic.

Then, we get the confidence interval in between the limits

[tex]\overline{x} \pm t_{\alpha/2}\times \dfrac{s}{\sqrt{n}}[/tex]

where [tex]t_{\alpha/2}[/tex] is the critical value of 't' that can be found online or from tabulated values of critical value for specific level of significance and degree of freedom = n - 1

For this case, we have:

The degree of freedom(d.f.) is n-1 = 10-1=9

At d.f. 9, at level of significance 0.05, the critical value of t is [tex]t_{\alpha/2} = 2.262[/tex]

Thus, the limits of the confidence interval is calculated as;
[tex]\overline{x} \pm t_{\alpha/2}\times \dfrac{s}{\sqrt{n}} = 98.44 \pm 2.262 \times \dfrac{0.3}{\sqrt{10}} = 98.44 \pm 0.2145[/tex]

This shows that the confidence interval is [98.44 - 0.2145, 98.44 + 0.2145] which is [98.2255, 98.6545] (in degree Fahrenheit)

Thus, the 95%  confidence interval for the mean of all body temperatures  is [98.2255, 98.6545] (in degree Fahrenheit)

Learn more about confidence interval for student's t statistic here:

https://brainly.com/question/15988841

Answer:

D. 2x - 2 + 3x

Step-by-step explanation:

First, add 2x and 3x. Then you get 5x. Then you get the equivalent expression 5x-2.

Answer:

Value of Cos 120 is -½.

Step-by-step explanation:

Answer:

sadasdsdfliygsadluhgasda

Step-by-step explanation:

asdasdasdasdas

sdasdaskudygasligdliausgldiuhgal;siughdliasd

I think it have 3 solution

Answer:

y=3/2x+3

Step-by-step explanation:

the line hits the y-axis at 3 so b=3 and the change in y is up 3 and the change in x is to the right 2 so the change in y over the change in x is 3/2

Answer:

You would need 32 cups of flour.

Step-by-step explanation:

If every 2 teaspoons of salt calls for 4 cups of flour, and there are 16 teaspoons of salt, we can divide 16 by the unit rate (2) and get 8; we then multiply 8 by 4 to reach 32.

Hope this helps!

Answer:

32

Step-by-step explanation:

16/2 = 8

8x4 = 32

Answer:

[tex]f(-10)=186[/tex]

Step-by-step explanation:

We can use substitution to find the value of [tex]f(-10)[/tex].

[tex]f(x) = 2x^2+x-4[/tex]

[tex]f(-10) = 2(-10)^2-10-4[/tex]

[tex]=200-10-4[/tex]

[tex]=186[/tex]

∴ [tex]f(-10) =186[/tex]

Hope this helps :)

Answer:

The value of f(-10) is equal to 186.

Step-by-step explanation:

We are given the function:

[tex]f(x) = 2x^2 + x - 4[/tex]

We are told to find the value of:

[tex]f(-10)[/tex]

If we pay close attention, we can see a transition between:

[tex]f(x) \rightarrow f(-10)[/tex]

We have turned x into -10, making x = -10.

Therefore, we can change the value of x in the entire function to -10.

[tex]f(-10)=2(-10)^2+(-10) - 4\\\\f(-10) = 200 - 10 - 4\\\\f(-10) = 186[/tex]

Therefore, f(-10) = 186.

Answer:

2/4

Step-by-step explanation:

Answer:

I ain't never seen 2 pretty bestfriends

Step-by-step explanation:

Answer:

$28.50

Step-by-step explanation:

Answer:

Draw a perpendicular line from point A to line segment BC. Name the intersection of said line at BC “E.” You now have a right angled triangle AED.

Now, you know AD = 6 m. Next, given that the trapezoid is a normal one, you know that the midpoints of AB and DC coincide. Therefore, you can find the length of DE like so, DE = (20–14)/2 = 3 m.

Next, we will use the cosign trigonometric function. We know, cos() = adjacent / hypotenuse. Hence, cosx = 3/6 = 1/2. Looking it up on a trigonometric table we know, cos(60 degrees) = 1/2. Therefore, x = 60 degrees.

Alternatively, you could simply use the Theorem for normal trapezoids that states that the base angles will be 60 degrees. Hope this helps!

Answer:

14310.91

Step-by-step explanation:

look at the second decimal which is one. then look at the number to the right and see if its 0-4 or 5-9. in this case its a 2 so it is in the first category

so you will keep the number the same and get rid of the remaining numbers

hope i explain alright :)

Answer:

3/5

7/13

10/7

Step-by-step explanation:

all of these are greater than 1/2

Answer:

y/9x

Step-by-step explanation:

[tex]\frac{3*x*y^{5} }{27*x^{2} *y^{4} } =\frac{3*x*y*y^{4} }{3*9*x*x *y^{4} }[/tex] symplify

[tex]\frac{y }{9*x }[/tex]

Answer:

x=-3

Step-by-step explanation:

12-3x=-6x

12=-3x-6x

12= -9x

----------

-9. -9

12/9= -3

Answer:

98%

Step-by-step explanation:

Answer:

(0,3) is the y intercept.

Step-by-step explanation:

Answer:

there isn't a link attached to know what you need help with

Step-by-step explanation:

Answer: exercise ur mouth by eating

Answer:

the answer is B. I hope this helps

Answer: y -200

Step-by-step explanation:

Answer:

Perpendicular...They have opposite slopes

Step-by-step explanation:

Answer:

Sales tax is $21 so 350+21= 371

Hope this helped :)

Step-by-step explanation:

Answer:

52

Step-by-step explanation:

Answer:

a

Step-by-step explanation:

edge 2021

Answer:

a=8

Step-by-step explanation:

We know that the right triangle has a total angle of 90.

We already have 50 witch means 40 is missing.

The equation given is:

6a-8 but we will upgrade it by the information we have so now it’s 6a-8=40

One of the multiples of 6 is, 6x8=48

Remember that 8 will be taken off.

Solve:

48-8=40 (witch is what we where looking for)

This is further proof that a=8

I have no idea what the answer is

In an equilateral triangle, the number of line of symmetry is three. Then the correct option is C.

If a line intersect the shape and the shape look identical on both sides of line, then the line is known as axis of symmetry.

A triangle is a three-sided polygon with three angles. The angles of the triangle add up to 180 degrees.

If all the sides of the triangle are congruent, then the triangle is known as an equilateral triangle.

And each angle of the equilateral triangle is 60 degrees.

In an equilateral triangle, the number of line of symmetry is three.

And each axis of symmetry bisects the side of the triangle.

Then the correct option is C.

The diagram is shown below.

More about the axes of symmetry link is given below.

https://brainly.com/question/4348533

#SPJ5

Answer:

2/3

Step-by-step explanation:

24students - 8 boys = 16 girls

16/24

2/3

Answer:

[tex]\frac{16}{24}=\frac{2}{3}[/tex]

also

[tex]\frac{8}{24} =\frac{1}{3}[/tex]

Step-by-step explanation: