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
aksik [14]
3 years ago
11

The cost of a daily newspaper varies from city to city. however, the variation among prices remains steady with a standard devia

tion of 20?. a study was done to test the claim that the mean cost of a daily newspaper is $1.00. ten costs yield a mean cost of 96? with a standard deviation of 18?. do the data support the claim at the 1% level?
Mathematics
1 answer:
Tanya [424]3 years ago
6 0

First, we establish our hypothesis:

<span>Null hypothesis H0: μ = $1.00  </span>

Alternative hypothesis Ha: μ ≠ $1.00

<span>Let’s say X  = the sample average cost of a daily newspaper = 0.96</span>

u = population mean cost = 1.00

S = sample standard deviation = 0.18

Calculating for z value:

z = (X – u) / S

z = (0.96 – 1) / 0.18

z = – 0.222

From the standard distribution table at this z value, p-value = 0.4129

Since alpha = 0.01, the decision therefore is:

<span>Do not reject the null hypothesis because the p-value is greater than 0.01. There is enough evidence to support the claim that the mean cost of newspapers is $1. </span>

You might be interested in
Linear or nonlinear ?
timurjin [86]
Nonlinear is correct the points are scattered across the graph :)
5 0
2 years ago
(08.06 MC)
Aleks04 [339]
A. 2x+y=25; x+y=20
x represents cheese wafers and y represents chocolate wafers.

B. I will choose elimination since there is y and y. I can multiply one equation by -1 to get y and -y, which cancels out.
2x+y=25
-x-y=-20

Add equations
x=5

Plug x in
5+y=20
y=15

Final answer: 5 cheese wafers, 15 chocolate wafers
3 0
3 years ago
Expand and simplify 2(a + 3) + 3(2a - 1)
Svetlanka [38]
2(a+3) + 3(2a-1)
First, let's use the distributive property to expand 2(a+3):
2(a+3) = 2*a + 2*3 = 2a + 6
Let's use the distributive property now to expand 3(2a-1):
3(2a - 1) = 3*2a - 3*1 = 6a - 3

So 2(a+3) + 3(2a-1) = 2a + 6 + 6a - 3
Now you calculate variables between each others, and numbers between each others:
2a + 6 + 6a - 3 = 2a + 6a + 6 - 3 = 8a + 3

So the simplified form of 2(a+3) + 3(2a-1) is 8a + 3.

Hope this Helps! :)
4 0
3 years ago
A bus stop makes a stop at 2:30 letting of 15 people and letting on nine the bus make another stop 10 minutes later to laugh or
gavmur [86]
15-9= 6 the difference is 6 people. i hope this is what you were looking for. 
7 0
3 years ago
Please help and for number 2
prohojiy [21]
Area = 1/2 x B x H
1/2 x 28.3 x 12.8 = 181.12

Answer is #3
7 0
3 years ago
Other questions:
  • Simplify to create equivalent to 19-6(-k+4)
    14·1 answer
  • nora owns a food truck that sells tacos and burritos. Nora must sell at least 420 worth of tacos and burritos each day. write an
    6·1 answer
  • The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of 0.5 min
    9·1 answer
  • an architect wants to build three similar triangles such that the ratio of the middle triangle. The smallest one has side length
    5·1 answer
  • Help , please and thanks
    14·1 answer
  • determine if the quadratic equation has 2 solutions, one, or 2 imaginary solutions by using the descriminant
    10·1 answer
  • Amy is biking to school from her father's house and Jeremy is biking to school from his aunt's house. Suppose Amy is moving at a
    5·1 answer
  • 16
    10·1 answer
  • What do you do with your points after you graduate?
    5·1 answer
  • $240 interest is earned on a principal of $1500 at a simple interest rate of 4% interest per year. For how many years was the pr
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!