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]
3 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]3 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
A science fair poster is a rectangle 3 feet long and 2 feet wide. What is the area of the poster in square inches? Be sure to in
vredina [299]
Area = length · width
Area = 3ft · 2ft
Area = 6ft²

hope this helps!
5 0
3 years ago
Paisley has 8\tfrac{1}{4}8 4 1 ​ cups of yogurt to make smoothies. Each smoothie uses \tfrac{11}{16} 16 11 ​ cup of yogurt. How
Ivenika [448]

Given:

Total Yogurt = 8\dfrac{1}{4} cups

Yogurt required for each smoothie = \dfrac{11}{16} cup

To find:

The number of smoothies that Paisley can make with the yogurt.

Solution:

We know that,

\text{Number of smoothies}=\dfrac{\text{Total yogurt}}{\text{Yogurt required for each smoothie}}

Substituting the given values, we get

\text{Number of smoothies}=\dfrac{8\dfrac{1}{4}}{\dfrac{11}{16}}

\text{Number of smoothies}=8\dfrac{1}{4}\times \dfrac{16}{11}

\text{Number of smoothies}=\dfrac{32+1}{4}\times \dfrac{16}{11}

\text{Number of smoothies}=\dfrac{33}{4}\times \dfrac{16}{11}

\text{Number of smoothies}=3\times 4

\text{Number of smoothies}=12

Therefore, the number of smoothies is 12.

6 0
3 years ago
Differentiate g(u)=sqrt(2)u+sqrt(3u). Is the answer
Alex777 [14]
The question or the problem ask to calculate or differentiate the said equation and in my own calculation and further formulation about the said equation, I think I would agree and said that the said answer you have given is true. I hope you are satisfied with my answer and feel free to ask for more 
5 0
3 years ago
What is 4 dogs with 12 legs
maxonik [38]
A dinosaur bc dinosaurs have lots of kegs
5 0
3 years ago
How do i solve for x
Basile [38]

Answer: x = 14


Step-by-step explanation:

the whole triangle's area 180 so you would add up all the angles and 66+62+38= 166 and 180-166=14 so 14 would = x


5 0
3 years ago
Other questions:
  • Explain how you can find 4times 754 using two different methods
    12·1 answer
  • matt is playing a game. he gains 7 poins loses 10 poins, gains 2 points, and then loses 8 points what is his final score
    8·1 answer
  • What is the solution of the system?
    14·2 answers
  • What is the inequality shown in the graph
    7·1 answer
  • Chris rode his bike along the same route every day for 60 days he loves it he had gone exactly 127.8 miles
    5·1 answer
  • A cone-shaped tent has a diameter of 12 ft and a height of 6 ft.
    15·2 answers
  • (x^3-4x^2+7x-28)/(x^2+7)
    15·1 answer
  • The radius of circle C is 6 units and the measure of
    14·1 answer
  • Please help me out!!!!!
    15·1 answer
  • How do i Write in Digits the fifty five hundredths​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!