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
OlgaM077 [116]
3 years ago
10

The mean caloric intake of an adult male is 2800 with a standard deviation of 115. To verify this information, a sample of 25 me

n are selected and determined to have a mean caloric intake of 2950. Determine the 98% confidence interval for mean caloric intake of an adult male. Solution: Since n < 30, a t-test must be used. 2950 – qt(1.98/2,24)*115/sqrt(25) 2950 + qt(1.98/2,24)*115/sqrt(25) [2892.68, 3007.32] What is wrong with this solution?
Mathematics
1 answer:
erma4kov [3.2K]3 years ago
8 0

Answer:

Step-by-step explanation:

We would use the t- distribution.

From the information given,

Mean, μ = 2950

Standard deviation, σ = 115

number of sample, n = 25

Degree of freedom, (df) = 25 - 1 = 24

Alpha level,α = (1 - confidence level)/2

α = (1 - 0.98)/2 = 0.01

We will look at the t distribution table for values corresponding to (df) = 24 and α = 0.01

The corresponding z score is 2.492

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

It becomes

2950 ± 2.492 × 115/√25

= 2950 ± 2.492 × 23

= 2950 ± 57.316

The lower end of the confidence interval is 2950 - 57.316 =2892.68

The upper end of the confidence interval is 2950 + 57.316 = 3007.32

The solution is correct.

You might be interested in
A plant is already 14.00 meters tall, and it will grow 8 centimeters every month. The plant's height, H(in meters), after x mont
djverab [1.8K]

Answer:

18 meters

Step-by-step explanation:

the function is already given to you so you can just plug 50 into x because x represents the # of months

H(x)=14+0.08(50)

H(x)=14+4

H(x)=18

So it's 18 meters tall

4 0
3 years ago
Please help as soon as possible
GenaCL600 [577]

Answer:

The first is -4 and the second is 10

Step-by-step explanation:

7 0
2 years ago
Ms. Robinson gave her class 12 minutes to read. Carrie read 5 1/2 pages in that time. At what rate, in pages per hour, did Carri
cricket20 [7]
The answer is:  " 27.5 pages " ; or, write as:  " 27 \frac{1}{2} pages " .
____________________________________________________________

5.5 pages / 12 minute = ? pages / 60 minutes; 


12 * 5 = 60 ;

5.5 * 5 = ? 


5.5 * 5 =   27.5
____________________________________________________________
The answer is:  " 27.5 pages " ; or, write as:  " 27 \frac{1}{2} pages " .
____________________________________________________________
4 0
3 years ago
Using the equation representing the height of the firework (h = -16t2 + v0t + h0), algebraically determine the extreme value of
lubasha [3.4K]
-16t^2 + v0t + h0

=  -16(t^2 - 1/16 v0t)  + h0
 = -16 [(t - 1/32v0)^2 - (1/32 v0)^2 ) + h0
 = -16(t - 1/32v0)^2 + 1/64 (v0)^2 + h0   which is the vertex form 

The vertex  is at the point (1/32v0, 1/64 (v0)^2)

1/32v0  represents the time  when the firework is at its maximum height and 1/64 (v0)^2  is this maximum height
6 0
3 years ago
Read 2 more answers
after learning how to fly, wendy reduced her daily commute time by 75%. previously her commute took m minutes.
jekas [21]

Answer:

m/0.75

Step-by-step explanation:

75% as a decimal is 0.75.

Divide m, her previous time by 0.75 to see how long it takes her now.

m/0.75 is your expression

5 0
3 years ago
Other questions:
  • What is 1 divided by 1/8?
    14·2 answers
  • Answer and explanation please?? #6
    6·2 answers
  • Which of the following is the solution to the compound inequality below?
    7·1 answer
  • True or false question someone plz help I’ll cash app !
    13·2 answers
  • The equation y-3=-2(x+5) is written in point-slope form. What is the y-intersept of the line?
    13·1 answer
  • 25 Points, will give brainliest
    6·1 answer
  • How can you use graphs to represent and analyze proportional relationships? EXIT TICKET Write an equation of the form y = kx for
    13·1 answer
  • Identify the slope (m) and y-intercept (b): 3x + 2y = -4
    12·1 answer
  • Solve this please…..
    15·1 answer
  • An isosceles triangle has two sides of equal length, a, and a base, b. The perimeter of the triangle is 15.7 inches, so the equa
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!