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
il63 [147K]
3 years ago
7

Chips Ahoy wants to perform a study to determine the number of chocolate chips in their cookies. To that end, they collected a s

ample of 40 cookies. The mean of this sample is 23.95 chocolate chips. From past studies, we know that the standard deviation is 2.55 chocolate chips. Construct a 99% confidence interval of the mean of chocolate chips in all such cookies.
Mathematics
1 answer:
Dahasolnce [82]3 years ago
5 0
The formula for the confidence interval is given by

Sample mean + z*[σ/√n], and
Sample mean - z*[σ/√n]

We have:
Sample mean = 23.95
n = 40 
σ = 2.55
z* for 99% confidence = 2.58

Substitute these values into the formula, we have

23.95 + (2.58)(2.55÷√40) = 24.99
23.95 - (2.58)(2.55÷√40) = 22.91

So the lower interval is 22.91 and the highest interval is 24.99
You might be interested in
The value of a boat is depreciating at a rate of 7% per year. In 2004 the boat was worth $180,000. Whats the value in 2009?​
ankoles [38]

Answer:

$117,000

Step-by-step explanation:

-0% 2004

-7% 2005

-14% 2006

-21% 2007

-28% 2008

-35% 2009

180,000 x 0.35 (35%) = 63,000

180,000 - 63,000 = 117,000

$117,000

7 0
3 years ago
(1.438 ×10^4) - (7.11 x 10^2)
yan [13]
The answer is 13669
5 0
3 years ago
What is the answer to this question?<br> 6x - 6 &lt; 12
rosijanka [135]

Answer:

X<3

Step-by-step explanation:

  6x−6+6<12+6

6x<18

Step 2: Divide both sides by 6.

6 divded by 6 = 1

18 divided by 6= 3

therefore the answer would be

X<3                  

7 0
3 years ago
Read 2 more answers
scrub-a-Dub toothbrushes are $4,00 each. There is a 10% discount, but there is also a 6% sales tax after the discount is applie
AlladinOne [14]
You multiply the 4.00 by 0.10 to get the 10% discount amount. Then you subtract that from $4.00. Then you multiply that amount by 1.06 to get the total with the 6% sales tax. To get $3.82 rounded to the nearest cent.
5 0
3 years ago
Find all missing variables and measures of each angle
iVinArrow [24]

Answer:

x= 18

10x=180

x=180/10

x=18

6 0
3 years ago
Other questions:
  • Solve the following system of equations by substitution. 3x + 2y = -12 x = 2 A. (2, -9) B. (-2, -3) C. (3, 2) D. (2, 3)
    14·1 answer
  • 4. The diagram at right shows the graph of 3x + 4y = 12. The shaded figure is a square, three of whose vertices are on the coord
    13·1 answer
  • Two numbers are in a ratio of 5:4. Their sum is 720. Find the bigger number.
    9·1 answer
  • When Liz woke up in the morning, it was 6°F. By the late afternoon, the temperature had dropped 9°F.
    6·1 answer
  • I need 24 and 25. :)
    5·1 answer
  • Which of the following is equivalent to this expression?
    9·1 answer
  • HELP ME I am not really sure how to explain this !!!
    14·1 answer
  • -4(y+1)+2 <br> help i am very confused
    14·1 answer
  • What integer is between 27 + 1 and 72 ?
    8·1 answer
  • Help please answer FAST for BRAINIEST!!!!<br> 2x^2 • 8x^-2/ 4x^-2 y^6<br> Please SIMPLIFY!!!!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!