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
Butoxors [25]
3 years ago
14

Suppose the board of directors for Cosmic Coffee wants to know the price range for the lowest 40% of drink sales. Find the z-sco

re associated with the upper boundary of of this price range.
Mathematics
1 answer:
antoniya [11.8K]3 years ago
8 0

Answer:

The z-score associated with the upper boundary of of this price range is -0.25.

Step-by-step explanation:

It is provided that the board of directors for Cosmic Coffee wants to know the price range for the lowest 40% of drink sales.

If <em>X</em> represents the price range of drink sales, then

P (X < x) = 0.40

Consider that <em>X</em> follows a Normal distribution.

To compute the probability of a normally distributed random variable we need to first convert the raw score to the <em>z</em>-scores.

The formula to <em>z</em>-score is:

z=\frac{X-\mu}{\sigma}

Then,

P (X < x) = 0.40

⇒ P (Z < z) = 0.40

The value of <em>z</em> for this probability is:

<em>z</em> = -0.25

*Use a <em>z</em>-table.

Thus, the z-score associated with the upper boundary of of this price range is -0.25.

You might be interested in
A man starts walking north at 2 ft/s from a point P. Five minutes later a woman starts walking south at 3 ft/s from a point 500
Vedmedyk [2.9K]

Answer:

The rate at which both of them are moving apart is 4.9761 ft/sec.

Step-by-step explanation:

Given:

Rate at which the woman is walking,\frac{d(w)}{dt} = 3 ft/sec

Rate at which the man is walking,\frac{d(m)}{dt} = 2 ft/sec

Collective rate of both, \frac{d(m+w)}{dt} = 5 ft/sec

Woman starts walking after 5 mins so we have to consider total time traveled by man as (5+15) min  = 20 min

Now,

Distance traveled by man and woman are m and w ft respectively.

⇒ m=2\ ft/sec=2\times \frac{60}{min} \times 20\ min =2400\ ft

⇒ w=3\ ft/sec = 3\times \frac{60}{min} \times 15\ min =2700\  ft

As we see in the diagram (attachment) that it forms a right angled triangle and we have to calculate \frac{dh}{dt} .

Lets calculate h.

Applying Pythagoras formula.

⇒ h^2=(m+w)^2+500^2  

⇒ h=\sqrt{(2400+2700)^2+500^2} = 5124.45

Now differentiating the Pythagoras formula we can calculate the rate at which both of them are moving apart.

Differentiating with respect to time.

⇒ h^2=(m+w)^2+500^2

⇒ 2h\frac{d(h)}{dt}=2(m+w)\frac{d(m+w)}{dt}  + \frac{d(500)}{dt}

⇒ \frac{d(h)}{dt} =\frac{2(m+w)\frac{d(m+w)}{dt} }{2h}                         ...as \frac{d(500)}{dt}= 0

⇒ Plugging the values.

⇒ \frac{d(h)}{dt} =\frac{2(2400+2700)(5)}{2\times 5124.45}                       ...as \frac{d(m+w)}{dt} = 5 ft/sec

⇒ \frac{d(h)}{dt} =4.9761  ft/sec

So the rate from which man and woman moving apart is 4.9761 ft/sec.

3 0
3 years ago
Please help me find the answer
eduard

Answer:

i think its the 3rd one very sorry if im wrong

Step-by-step explanation:

6 0
3 years ago
33pt =__ qt __qt pliz. hurry
Valentin [98]
 <span>16.5 
1 pint(US) = 0.5 quarts (US)</span>
5 0
3 years ago
Each blank on the coordinate plane has an address called the blank,blank
Mkey [24]

Answer:

adress, Like ( make up an adress)

Step-by-step expanation:

6 0
3 years ago
Read 2 more answers
2.
Fantom [35]

Answer:

the mode remains the same

Step-by-step explanation:

42 is outlier.

mod is the most repetitive number of a number string, and outlier does not change it.

the mode remains the same.

7 0
3 years ago
Other questions:
  • Ellie is preheating her oven before using it to bake. The initial temperature of the oven is 65° and the temperature will increa
    14·1 answer
  • The average person drinks 1 pint of milk a day. At this rate, how many gallons will a person drink in a leap year
    12·2 answers
  • What is the answer ?​
    9·2 answers
  • Find the value of x in the given figure.<br> A) 44° <br> B) 40° <br> C) 36° <br> D) 32°
    8·2 answers
  • Of the 18 people attending a seminar, 4 have red hair. look at picture
    10·1 answer
  • The length of a rectangle is eight more than it’s width the perimeter is 48 inches what are the length and width?
    7·1 answer
  • The output is six times the Input
    12·1 answer
  • £50 is divided between Krutika, Natasha &amp; Richard so that Krutika gets twice as much as Natasha, and Natasha gets three time
    11·2 answers
  • X - 62.54 = 85.6<br><br> Answer for x
    13·2 answers
  • Write in the form a to the power of n where n &lt; 01/ 9x9x9x9x9x9x9x9x9x9
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!