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
jok3333 [9.3K]
2 years ago
9

Whenever the population standard deviation is unknown, which distribution is used in developing an interval estimate for a popul

ation mean
Mathematics
1 answer:
r-ruslan [8.4K]2 years ago
4 0

Answer:

The t-distribution is used.

Step-by-step explanation:

When we dont know the standard deviation of the population, we use the t-distribution(t-table).

Otherwise, the z-distribution(z-table) is used.

So the answer to this question is the t-distribution.

You might be interested in
??? Anyone know how to answer this question
True [87]
Answer: 35 additional teachers are needed

-------------------------------------------------
-------------------------------------------------

Explanation:

We have 2470 students and the ratio of students to teachers is 26:1. This means that for every teacher, there are 26 students. Put another way, we can set up this ratio

2470/x = 26/1

where x is the number of teachers. Cross multiply and solve for x

2470/x = 26/1
2470*1 = 26*x
2470 = 26x
26x = 2470
26x/26 = 2470/26
x = 95

So we have 95 teachers currently

-------------

Let y be the new number of teachers needed to bring the ratio down to 19:1

Using a similar idea as done above, we would have this ratio

2470/y = 19/1

Let's solve for y
2470/y = 19/1
2470*1 = 19*y
2470 = 19y
19y = 2470
19y/19 = 2470/19
y = 130

So we'll need 130 teachers to have the ratio be 19:1

The difference of the values is y - x = 130 - 95 = 35, which is the final answer. This is the additional amount of teachers needed.
5 0
3 years ago
Ms. Allen makes beaded purses. She used 4,725 beads to make 3 identical purses (they are exactly the same and use the same numbe
solong [7]
4,725 divided by 3 equals 1,575
5 0
3 years ago
of the last 15 contestants on a game show, 3 won a prize. Considering this data, how many of the next 20 contestants would you e
nadya68 [22]
You do 3/15 which is 0.2

then 0.2*20 which is 4

you can expect 4 to win a prize

hope this helps and you rate me good;)
4 0
3 years ago
Mrs. Shelly paid $3 for 6 muffins and Mrs. Kloske paid $9 for 18 muffins. Is the amount Mrs. Kloske and Mrs. Shelly paid equival
Mrac [35]
Yes, because you can multiply $3 by 3 to get $9 and 6 muffins by 3 to get 9 muffins.
8 0
2 years ago
Read 2 more answers
Which piecewise function is shown on the graph?
Scilla [17]
The very first one probably
9 0
3 years ago
Read 2 more answers
Other questions:
  • a recipe calls for 2/5 cup of chicken broth and 1/4 cup of vegetable broth what is the total amount of broth needed for the reci
    11·2 answers
  • With the sun at an angle of 30 degrees to the ground, a tree casts an 80 ft shadow. how tall is the tree?
    8·1 answer
  • What do I do? Help me please I'm stuck
    6·1 answer
  • 1.) (7.RP.3) Tracy started a savings account that is set up so that the simple interest earned on the investment is moved into a
    13·1 answer
  • Which equation can be used to find the volume of this solid? A rectangular prism with a length of 5 centimeters, width of 4 cent
    7·1 answer
  • URGENT!!!
    14·2 answers
  • How many leaves are on a tree
    7·2 answers
  • The value of a car decreases by 5% each year.
    13·1 answer
  • For a company picnic, Nick ordered a box of fresh-baked gingerbread cookies and sugar cookies. The box included a total of 36 co
    15·1 answer
  • What is the value of this expression?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!