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Nastasia [14]
3 years ago
12

A local grocer wants to find out whether how many mixed flower bouquets in his inventory everyday. To that end, kept records of

the daily bouquet sales for the last 27 days. The average number of bouquets sold every day was 11.8 and the sample standard deviation is 2.3. Construct a 99% confidence interval for the number of bouquets sold on a given day..
Mathematics
1 answer:
Alenkinab [10]3 years ago
7 0
Given:
n = 27, sample size
df = n-1 = 26, degrees of freedom
xb = 11.8, sample mean
s = 2.3, sample standard deviation.

Because population statistics are not known, we should use the Student's t-distribution.
At 99% confidence interval, the t-value = 2.779 (from tables).
The confidence interval is
11.8 +/- 2.779*(2.3/√(27)) = 11.8 +/- 1.23 = (10.57, 13.03)

Answer: (10.6, 13.0) to the nearest tenth
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B. Compare and Contrast How are colloids and<br> suspensions different from solutions?
erastova [34]

Step-by-step explanation:

Solutions, colloids and suspensions are the three main classifications of a mixture based on sizes of the particles.

  • A solution is a homogeneous mixture of solutes and solvents.
  • Suspensions are mixtures of small insoluble particles of a solid in a liquid or gas.
  • Colloids are homogeneous mixtures of two phases.

Solutions have the following characteristics:

  • The size of particles is small
  • The particles do not settle on standing.
  • The particles pass through ordinary filter papers.
  • They are clear and do not have color.
  • They do not scatter light

Suspensions have the following properties:

  • The particles dispersed are large
  • They settle on standing.
  • The particles do not pass through ordinary filter papers
  • They do not pass through permeable membrane
  • They are visible with microscope or naked eyes.
  • They are cloudy
  • Scatters light.

Colloids have the following properties:

  • Their particles are between those in solutions and suspensions.
  • Their particles do not settle on standing.
  • Their particles pass through ordinary filter paper.
  • They do not pass through permeable membranes.
  • Scatters light

Learn more:

Mixtures brainly.com/question/4592300

#learnwithBrainly

5 0
3 years ago
Find the value of X
kap26 [50]

Answer:

x = 27

Step-by-step explanation:

We can say that sum of all interior angles adds up to: 180°, therefore;

(3x - 17) + (2x - 5) + (x + 40) = 180°

=> now add like terms together:

=> 3x + 2x + x = 6x

=> -17 + (-5) + 40 = 18

Therefore;

6x + 18 = 180°

6x = 180 - 18

6x = 162

x = 162/6

<u>x = 27</u>

Hope this helps!

7 0
3 years ago
Once period has– places ​
romanna [79]

Answer:

It’s has 3 places

Step-by-step explanation:

8 0
3 years ago
56 in²
garri49 [273]

The area of the remaining board is [(L × B) - (l × b)].

According to the statement

We have to find that the area of the remaining board.

So, For this purpose, we know that the

Area of rectangle is the region occupied by a rectangle within its four sides or boundaries. The area of a rectangle depends on its sides.

From the given information:

Suppose the bigger rectangle is labelled as ABCD and the smaller rectangle is labelled as PQRS.

And

Consider that the length and breadth of the bigger rectangle are L and B respectively. And the length and breadth of the bigger rectangle are l and b respectively.

The area of any rectangle is:

Area = Length × Breadth

The area of the bigger rectangle is:

Area of ABCD = L × B

The area of the smaller rectangle is:

Area of PQRS = l × b

Then the area of the remaining board will be:

Area of remaining board = Area of ABCD - Area of PQRS

Area of remaining board= (L × B) - (l × b)

Thus, The area of the remaining board is [(L × B) - (l × b)].

Learn more about Area here

brainly.com/question/8409681

Disclaimer: This question was incomplete. Please find the full content below.

Question:

A rectangle is removed from the middle of a larger rectangular shaped board. What is the area of the remaining board?

#SPJ9

6 0
2 years ago
A card is drawn from a standard deck of cards. Find the​ probability, given that the card is a non dash face card. ​P(nine​)
sattari [20]

Answer:

Step-by-step explanation:Knowing that

There are 26 black cards and 26 red ones. Face card consists of jack (J), queen (Q), king (K). There are (26-6)=20 non face red cards. “Either ... or ...” here means bundle of both kinds of cards.

So, there are (26+20)=46 expected cards.

If you also ask for the probability, so the probability of the question asking above is equal to

23/26

6 0
3 years ago
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