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
jarptica [38.1K]
3 years ago
12

Given that X ~ N(120, 35). We survey samples of 25 and are interested in the distribution of X-bar. Find the z-score associated

with x-bar = 100.
a. -14.2857
b. -20/35
c. -2.8571
d. -20
Mathematics
1 answer:
lubasha [3.4K]3 years ago
8 0

Answer:

Option c -2.8571

Step-by-step explanation:

z-score are calculated as

z=\frac{xbar-mean}{\frac{S.D}{\sqrt{n} } }.

We are given that mean=120 and standard deviation=S.D=35 as X~N(120,35).

Sample size=n=25.

We have to find z-score for x-bar=100. So,

z-score=[100-120]/[35/√25]

z-score=[-20]/[35/5]

z-score=-20/7

z-score=-2.8571.

Thus,  the z-score associated with x-bar = 100 is -2.8571.

You might be interested in
Which equation shows the correct use of the Power of Products Property?
Vadim26 [7]
The power of products property states that for number enclosed in a bracket or parenthesis, if it is raised to a power, it must be multiplied to the power of the enclosed number no matter how different the base is. You cannot add it because it is not raised. You can only add it if they have the same base. But in this problem, you will just multiply it. The breakdown of the solution to this problem is shown below. So,
<span><span>• (2x⁵y²)³=(21x3x5*3y2*3) = 6x15y6</span><span>

</span></span>
7 0
3 years ago
How many tiles of 10cm by a 6cm will be needed to pave a rectangular path of 5m by 3m
kherson [118]

Answer:

2500 tiles

Step-by-step explanation:

convert the path to the same units, one m = 100 cm

path= 500 cm x 300 cm

path area = 150,000 cm^2

each tile = 10x6 = 60 cm^2

150,000/60 = 2500 tiles

6 0
2 years ago
At a zoo, 8 monkeys ate 64 bananas in one day. At
WARRIOR [948]

Answer:

96

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Rearrange the formula m = x + y 2 for y.
Anika [276]
M - x = y^2
y=√(m - x)
3 0
2 years ago
Read 2 more answers
Find the length of the missing side. The triangle is not drawn to scale.<br> 20 m<br> 16 m<br> *
Nataly [62]

Answer:

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • James works as a tutor and a lawn mower. Both jobs require that he work at least three hours per week. Since James attends schoo
    10·1 answer
  • Plz gimme the right anwser
    13·2 answers
  • My mom ran errands for one hour and 45 minutes. If she left at 2:15 pm.,what time did she retured
    6·1 answer
  • Write the equation using polar coordinates y^2=16x
    12·1 answer
  • The natural remedy echinacea is reputed to boost the immune system, which will reduce flu and colds. A 6-month study was underta
    6·1 answer
  • What was life like in Hargigo before people planted the mangrove trees?
    6·1 answer
  • Please answer this correctly without making mistakes
    14·1 answer
  • What are the values of A, B, and C in the equation –4x – 5y = 8?
    12·2 answers
  • Select all the expressions that are equal to <br> 8(x-24)
    5·1 answer
  • Type the correct answer in each box. Spell all words correctly, and use numerals instead of words for numbers.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!