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
Rom4ik [11]
3 years ago
9

Does anyone know the answers to these?

Mathematics
1 answer:
dem82 [27]3 years ago
3 0

Step-by-step explanation:

a. The point estimate is the mean, 47 days.

b. The margin of error is the critical value times the standard error.

At 31 degrees of freedom and 98% confidence, t = 2.453.

The margin of error is therefore:

MoE = 2.453 × 10.2 / √32

MoE = 4.42

c.  The confidence interval is:

CI = 47 ± 4.42

CI = (42.58, 51.42)

d. We can conclude with 98% confidence that the true mean is between 42.58 days and 51.42 days.

e. We can reduce the margin of error by either increasing the sample size, or using a lower confidence level.

You might be interested in
two dice are rolled in succession. determine the probability that their sum is 8 or more, given that the first die is a 4 or mor
viva [34]
See the pic for answer. 

8 0
3 years ago
What translation rule can be used to describe the result of the composition of T < 4, −10 >(x, y) and T < −1, −9 >(x
Vikki [24]

The first translation picks a point and adds 4 to its x coordinate, and subtracts 10 from the y coordinate. In other words, it moves the point 4 units to the right and 10 units down.

Similarly, the second translation subtracts 1 to the x coordinate, and subtracts 9 from the y coordinate. In other words, it moves the point 1 unit to the left and 9 units down.

So, if you perform one translation after the other, you move the point 4 units to the right and 1 unit to the left along the x axis, and 10 units down and 9 more units down along the y axis.

The net result is a translation of 3 units to the right and 19 units down.

6 0
3 years ago
A rectangle is a special type of: I. Pentagon II. Circle III. Quadrilateral IV. Triangle
dimulka [17.4K]
The correct answer is the third choice, Quadrilateral.
8 0
3 years ago
Read 2 more answers
I need to know number 5 just what it says thank you
Stels [109]

Answer:

C

Step-by-step explanation:

Okay! Time to use the Pythagoras theorem.

a^2 + b^2 = c^2

4^2 + 7^2 = x^2

16 + 49 = c^2

65 = c^2

Let's take the square root of both sides to get

c ~ 8.06

C

:)

5 0
3 years ago
Read 2 more answers
5(2f+3)+7. please simplify
Sergio [31]
Hi there!

5(2f+3)+7
= 10f+15+7
= 10f+22

Hope this helps!
3 0
3 years ago
Read 2 more answers
Other questions:
  • Alvin is
    6·2 answers
  • Consider the equation y=4x what is the value of 4x when x=8
    10·2 answers
  • Toddrick has a photo album. Some pages have one photo on them, and other pages have two photos on them. If Toddrick has 9 photos
    6·1 answer
  • chin bought 12 pounds of apples for 6 dollars use the ratio table to find the cost of buying 3 pounds of apples
    15·1 answer
  • Three times the difference between 4 times h and five is 45
    7·1 answer
  • Jared is 10 years old, and Peter is 15 years old. Together, they run 150 yards. How far does each brother run. if a brother is t
    8·1 answer
  • A flagpole 13m tall casts a 7m shadow. At the same time of day a building casts a 46m shadow. How tall is the building?
    14·1 answer
  • Find the inverse of this matrix.<br> 1 -1 -1<br> -1 2 3 <br> 1 1 4
    14·1 answer
  • Grant mows lawns and charges $15 per lawn. He paid his brother $45 to help him. How many lawns could Grant mow and make at least
    6·2 answers
  • Find 26 2/3 % of 90.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!