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
Pepsi [2]
2 years ago
12

Customers at Costco spend an average of $130 per trip (The Wall Street Journal, October 6, 2010). One of Costco's rivals would l

ike to determine whether its customers spend more per trip. A survey of the receipts of 25 customers found that the sample mean was $135.25. Assume that the population standard deviation is $10.50 and that spending follows a normal distribution. Use standard normal curve area table.A, Specify the appropriate null and alternative hypotheses to test whether average spending at the rival�s store is more than $130.B. Calculate the value of the test statistic.C. Calculate the p-value.D. Calculate the critical value
Mathematics
1 answer:
katrin [286]2 years ago
6 0

Answer:

Step-by-step explanation:

Given the following :

Average amount spent (U) = $130 per trip

Sample size (n) = 25

Sample mean (m) = $135.25

Population standard deviation (sd) = $10.50

Assume a standard distribution.

A.) Null hypothesis ; Alternative hypothesis

Hnull : U ≤ 130 ; Ha : U > 130

B.) value of test statistic :

Z = (m - U) / standard error

Standard Error = sd / sqrt(n)

Standard Error( S.E)= 10.50 / sqrt(25)

S.E = 10.50 / 5 = 2.1

Hence,

Z = (135.25 - 130) / 2.1

Z = 5.25 / 2.1

Z = 2.5

C. Calculate the p-value.

Using the p value calculator by entering the z-score above, the p value obtained is 0.0124

P value = 0.01

D. Calculate the critical value

You might be interested in
On a map, ½ inch represents 200 miles. How long would a line on a map need to be in order to represent 1800 miles?
givi [52]
9 because 1,800 divided by 200 is 9
6 0
3 years ago
X+ 0.0825×=216.50 A.) x=2.00 B.) x=20.0 C.) x=200 D.) x=2000
Luden [163]
X+0.0825x=216.5
1.0825x=216.5
x=216.5 / 1.0825
x=200

Answer: C.)  x=200
8 0
3 years ago
What number equals 2 4/5?<br> O 0.28<br> O 0.357<br> O 2.45<br> O 2.8
Travka [436]

I think its 2.8.

Reason why:

4/5 = 0.8

Then the 2 would a whole number...

so 2.8.

5 0
3 years ago
In a survey 7/8 of the people surveyed said that recycling is important. Only 1/2 of them buy products made with recycled materi
morpeh [17]

Answer:

only 3.5 buy products made with recycled material but you have to round it to 4

5 0
3 years ago
At summer camp there are 52 boys, 47 girls,and 18 adults.How many people are at summer camp?
Natasha2012 [34]

114 people I believe

8 0
3 years ago
Other questions:
  • Find the solution to the system of equations.
    9·2 answers
  • A rectangular skate park is 60 yards long and 50 yards wide
    6·1 answer
  • Colton scored a 70 on his first history test of the term and a 91 on the second history test. By what percent did Colton's score
    10·1 answer
  • Plz help ZOOM IN TO SEE IT CLEAR
    10·1 answer
  • Factor. 2y^2 - 7y + 6
    13·1 answer
  • The Burj Khalifa, a building in Dubai, United Arab Emirates, is about 828 meters tall. Brody is making a scale model of this bui
    6·1 answer
  • Paul tosses a quarter off the Main Street bridge into the St. John’s River. The
    10·1 answer
  • How many solution does this equation have 17+4h+2=19−5h+9h?
    8·2 answers
  • The data set shows the ages of the players of the soccer team. What is the most common age of the members of the team? Explain h
    14·2 answers
  • Help me pls, with solution pls
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!