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
Lilit [14]
2 years ago
6

A restaurant/bar conducted random sampling of bar purchases. In a sample of 17 restaurant patrons, they found that, when the bac

kground music tempo was slow, the mean purchase amount was $30.47 with a standard deviation of $15.10. In a sample of 14 patrons in the same restaurant, they found that, when the background music tempo was fast, the mean purchase amount was $21.62 with a standard deviation of $14.80. The bar would like to know if they can conclude that background music tempo leads to different average purchase amounts at the bar. What test should be used
Mathematics
1 answer:
Gwar [14]2 years ago
6 0

Answer:

Two sample test of means with unknown variance (standard deviation) but assumed equal

Step-by-step explanation:

For the scenario described above, we apply the two sample test means with unknown variance (standard deviation) but assumed equal test because, the there are two differebt or independent groups, each with its owm subjects or observations. The population variance or standard deviation aren't given. However, the variance are assumed to be equal., since the two groups of sample are chosen from the same population. Therefore, for the scenario described above, the most appropriate test would be a Two sample test of means with unknown variance (standard deviation) but assumed to be equal

You might be interested in
keri rented a canoe from a rental company for atotal of $35.00 the company charges $10.50 for the first hour and $8.25 per hour
Zielflug [23.3K]

Answer:

She rented it for 3 hours.

8.25 times 3 plus 10.50 = 35.00

6 0
2 years ago
leos oil field supply can deliver enough pipe valves to Valo Oil Company to fill their storeroom in 8 hours. valo oil compamy ca
DedPeter [7]
The answer would be ooo ahhhh eeee wala wala bang bang
6 0
3 years ago
Andrea bought 10 bagels and 6 muffins at the bakery. of these items 2/3 of the bagels were multigrain and 3/5 of the muffins wer
DENIUS [597]
The answer that makes the most scents is. 3 out of the five muffins
4 0
3 years ago
1. Renting a bicycle at a local Bike shop costs $30 for the first day and $10 for each additional day.
r-ruslan [8.4K]
(a)    d=days C=cost  
   
       d       C
       1       30
       2       40
       3       50
       4       60

C=10(d-1)+30

(b) C=10(5-1)+30
      C=40+30
      C=70
7 0
3 years ago
How do I solve polynomials
spin [16.1K]

Answer:

Polynomial comes from poly- (meaning "many") and -nomial (in this case meaning "term") ... so it says "many terms"

Also they can have one or more terms, but not an infinite number of terms.

These are polynomials:

3x

x − 2

−6y2 − ( 79)x

3xyz + 3xy2z − 0.1xz − 200y + 0.5

512v5 + 99w5

5

(Yes, "5" is a polynomial, one term is allowed, and it can be just a constant!)

 

These are not polynomials

3xy-2 is not, because the exponent is "-2" (exponents can only be 0,1,2,...)

2/(x+2) is not, because dividing by a variable is not allowed

1/x is not either

√x is not, because the exponent is "½" (see fractional exponents)

 

But these are allowed:

x/2 is allowed, because you can divide by a constant

also 3x/8 for the same reason

√2 is allowed, because it is a constant (= 1.4142...etc)

Monomial, Binomial, Trinomial

There are special names for polynomials with 1, 2 or 3 terms:

monomial, binomial, trinomial

Variables

Polynomials can have no variable at all

Example: 21 is a polynomial. It has just one term, which is a constant.

Or one variable

Example: x4 − 2x2 + x   has three terms, but only one variable (x)

Or two or more variables

Example: xy4 − 5x2z   has two terms, and three variables (x, y and z)

What is Special About Polynomials?

Because of the strict definition, polynomials are easy to work with.

For example we know that:

If you add polynomials you get a polynomial

If you multiply polynomials you get a polynomial

So you can do lots of additions and multiplications, and still have a polynomial as the result.

Also, polynomials of one variable are easy to graph, as they have smooth and continuous lines.

Example: x4−2x2+x

x^4-2x^2+x  

See how nice and

smooth the curve is?

You can also divide polynomials (but the result may not be a polynomial).

Degree

The degree of a polynomial with only one variable is the largest exponent of that variable.

Example:

4x3-x-3 The Degree is 3 (the largest exponent of x)

For more complicated cases, read Degree (of an Expression).

Standard Form

The Standard Form for writing a polynomial is to put the terms with the highest degree first.

Example: Put this in Standard Form: 3x2 − 7 + 4x3 + x6

The highest degree is 6, so that goes first, then 3, 2 and then the constant last:

x6 + 4x3 + 3x2 − 7

You don't have to use Standard Form, but it helps.

5 0
3 years ago
Other questions:
  • Express in lowest terms. x+x^4/x^2-x+1<br> A. x^4 /2<br> B. x(x+1)<br> C. 1 + x^2
    14·2 answers
  • Please help me<br><br> f(x) =3x^2 + 2x - 1 <br> what is f(5)
    13·2 answers
  • On a number line, C is at -6 and D is at 14. What is the coordinate of E, which is 1/4 of the way from C to D?
    12·1 answer
  • Number 5. I neeed the answer please and thankyou
    9·2 answers
  • There are 5 people in a raffle drawing. Two raffle winners each win gift cards. Each gift card is the same. How many ways are th
    12·1 answer
  • Determine whether the following is a statistical question. How many teeth does Edna have in her mouth?
    12·2 answers
  • Write a multiplication problem in which the product is between . 05 and . 75.
    15·1 answer
  • Smallest to largest <br> 60% 0.4 1/2
    8·1 answer
  • Evaluate the expression.
    8·1 answer
  • Cuánto son cinco veces doce​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!