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
vazorg [7]
3 years ago
9

A woman at a grocery store wanted to purchase a 5 pound bag of apples but thought she would first weigh the bag on the store sca

le to verify the weight. The store scale read 4.5 lbs. The woman alerted the store manager of her finding. He weighed 100 bags of apples from his store and the average weight turned out to be 4.38 pounds with a SD of 0.5 pounds. After the manager contacted the packaging company, they conducted their own investigation. They weighed 100 bags of the 5 pound bags that they had just packaged at the plant and came up with an average weight of 4.95 lbs. with a SD of 0.5 pounds. Is the lower apple bag weight observed at the grocery store likely to be due to chance variation?
Mathematics
1 answer:
alex41 [277]3 years ago
3 0

Answer:

No

Step-by-step explanation:

here we are interested to test the mean weight of a bag is less than 5 pound.

So null hypothesis isH_0:\mu =5

and alternative hypothesis is H_1:\mu

Let's do one sample z test.

The given information Sample size = n =100

sample mean\overline{X}=4.38,

standard deviation \sigma =0.5

Test statistic:Z=\frac{\overline{X}-\mu }{\frac{\sigma }{\sqrt{n}}}

Z=\frac{4.38-5}{\frac{0.5}{\sqrt{100}}}=-12.4

This is a left tailed test, hence the p value for the left tailed test and Z score= -12.4 is \approx 0

Hence We can reject the null hypothesis to say that we have evidence that apple bag weight at the grocery store is less than 5 pounds and it is not a chance variation

You might be interested in
Shirley has earned $148 doing chores, but she wants to have earned at least $200 by the end of the week. if she does chores ever
asambeis [7]
Next 7 days
amount needed-amount now=amount in each day200-148=52
52 in 7 daysdivide by 752/7=7.4285round7.43
need to earn about $7.43 each day
5 0
3 years ago
How much p² – q² + 2pq is less than -2p² -2q² + 7pq +10 ?
ValentinkaMS [17]

Answer:   3p² + q² - 5pq - 10 < 0

<u>Step-by-step explanation:</u>

p² - q² + 2pq < -2p² - 2q² + 7pq + 10

since you didn't specify what to solve for, move everything from the right side to the left side of the inequality symbol using inverse operations.

(p² + 2p²) + (- q² + 2q²) + (2pq - 7pq) + (- 10) < 0

    3p²      +        q²        +      -5pq       +   -10  < 0

3p² + q² - 5pq - 10  < 0

6 0
3 years ago
John works 40hrs a week getting paid $13.00 per hour. He gets paid weekly and gets taxed 22%. How much is his weekly check?
Charra [1.4K]

Answer:

$405.60

Step-by-step explanation:

40x13=520

520x.22= 114.4

520-114.4=405.60

6 0
3 years ago
(-2/3) to the power of 2 minus 3/4 times (2 1/3)
hodyreva [135]

Answer:

-1.30555555556

4 0
3 years ago
A bad contains 42 cups of dog food your dog eats 2 1/3 cups of dog food each day how many days does the bag of dog food last
WARRIOR [948]
It will last 18 days
4 0
3 years ago
Read 2 more answers
Other questions:
  • -3&lt;3x less than or equal to 9 on an number line
    8·1 answer
  • A layered birthday cake has two rectangular prism layers. The base layer measures 12 inches by 10 inches.The second layer is thr
    11·1 answer
  • Equilateral triangle has an altitude length of 33 feet find a length of a side
    15·1 answer
  • HURRY I'LL PICK A BRAINLIEST PERSON!!!!
    13·2 answers
  • I just finished my school work for the year!!!
    14·2 answers
  • Help me find the slope
    12·2 answers
  • Select the correct answer.
    6·2 answers
  • Is the relationship shown by the data linear? If so, model the data with an equation.
    5·2 answers
  • A consumer agency is interested in examining whether there is a difference in two common sealant products used to waterproof res
    14·1 answer
  • The truth or falsity of a statement ?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!