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
Alenkasestr [34]
3 years ago
9

A survey was conducted by an independent price checking company to check an advertiser's claim that it had lower prices than its

competitors. The average weekly total, based on the prices of approximately 95 items, is given for this chain and for its competitor recorded during four consecutive weeks in a particular month.
Week Advertiser (5) Competitor ($) 1 254.28 256.11 2 240.55 255.68 3 235.90 255.20 4 234.15 26115
Is there a significant difference in the average prices for these two different supermarket chains? (Use a = 0,05. Use tri-competitory)
State the null and alternativelypotheses
Mathematics
1 answer:
Mama L [17]3 years ago
5 0

Answer:

a) critical values ≈ -3.182 and 3.182  shows that there is difference in average prices

b)   H0 : μd = 0

    Ha : μd ≠ 0

Step-by-step explanation:

<u>a) Determine if there is any significant difference in the average prices </u>

using ∝ = 0.05

and  μ( advertiser ) - μ ( competitor ) = μd

test statistic ( t ) =  -3.011

df = 3

hence the critical values ( two tailed test ) =  -3.182 and 3.182. this shows that there is sufficient evidence to show that there is difference in the average prices

<u>b) state the hypothesis</u>

 H0 : μd = 0 ( null )

Alternate hypothesis : Ha : μd ≠ 0

You might be interested in
2.In quadratic equation ax2 + bx + c = 0, if discriminant is D= b2 - 4ac, then roots of the quadratic equation are
tino4ka555 [31]

Answer:

(2) Real and equal (i.e., repeated roots), if D = 0.

Step-by-step explanation:

.In a quadratic equation ax2 + bx + c = 0, if discriminant is D= b2 - 4ac, then roots of the quadratic equation are

Real and equal (i.e., repeated roots), if D = 0.

If the D > b² - 4ac then it's real and distinct.

3 0
3 years ago
Solve for g.<br> 2(g - 13) = 12<br> g
densk [106]

Answer:

-2

Step-by-step explanation:

4 0
3 years ago
miss. Nikkel want to divide her class of 23 students into 4 equal teams.is this reasonable?why or why not
ella [17]
No, because if you divide 23 / 4, you get 5.75. You can't get 0.75th of a kid. So it is not reasonable, because it is a decimal, and not a whole number.

Hope this helped! ☺♥
6 0
3 years ago
Read 2 more answers
A car manufacturer estimates that 25% of the new cars sold in one city have defective engine
photoshop1234 [79]

Answer: 672 cars will have defective engine mounds

Step-by-step explanation: 25% of 2,688 is 672

8 0
3 years ago
HELP ME PLEASEE
Nina [5.8K]

Answers:

x = -8/5 or x = 8/5

Sum of the first ten terms where all terms are positive = 4092

========================================================

Explanation:

r = common ratio

  • first term = 4
  • second term = (first term)*(common ratio) = 4r
  • third term = (second term)*(common ratio) = (4r)*r = 4r^2

The first three terms are: 4, 4r, 4r^2

We're given that the sequence is: 4, 5x, 16

Therefore, we have these two equations

  • 5x = 4r
  • 4r^2 = 16

Solve the second equation for r and you should find that r = -2 or r = 2 are the only possible solutions. If r = -2, then 5x = 4r solves to x = -8/5. If r = 2, then 5x = 4r solves to x = 8/5.

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

To find the sum of the first n terms, we use this geometric series formula

Sn = a*(1 - r^n)/(1 - r)

We have

  • a = 4 = first term
  • r = 2, since we want all the terms to be positive
  • n = 10 = number of terms to sum up

So,

Sn = a*(1 - r^n)/(1 - r)

S10 = 4*(1 - 2^10)/(1 - 2)

S10 = 4*(1 - 1024)/(-1)

S10 = 4*(-1023)/(-1)

S10 = 4092

8 0
3 years ago
Other questions:
  • A system of two linear equations is graphed on a coordinate plane. If the system of equations has infinitely many
    10·1 answer
  • Solve 5x+14=k for x<br> A. X=k-14<br> B. X=5K-14<br> C.X=k+14/5<br> D.X=k-14/5
    13·1 answer
  • One pound of horsehair is divided into "pulls" to make horsehair belts. One "pull" weights about 0.011 ounces. How many "pulls"
    9·1 answer
  • Enter your answer in the box.<br>The triangles are similar.<br>What is the value of x?​
    12·1 answer
  • At a store the cost of a pair of socks and two equally priced shirts is $24, and the cost of three of the same pair of socks and
    6·2 answers
  • What is -12 + (-66) + (-48)
    5·2 answers
  • A box shaped like a rectangular prism has a length of 8 inches and width of 8 inches. Its volume is 512 cubic inches. What is th
    6·1 answer
  • 19<br> 219<br> 5/183/6<br> 0 =&gt;<br> Skip<br> 18/43 complete
    12·1 answer
  • У<br> (x, y) (?x, ?y)<br> A'<br> 3-4-3-2-10<br> 1<br> 2<br> B<br> C<br> B<br> с
    11·1 answer
  • What is the longest line segment that can be drawn in a right rectangular prism that is 13 cm long,
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!