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
ikadub [295]
3 years ago
15

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 420 gram setting. It is

believed that the machine is underfilling of overfilling the bags. A 61 bag sample had a mean of 424 grams with a standard deviation of 26. Assume the population is normally distributed. A level of significance of 0.01 will be used. Specify the type of hypothesis test.
Mathematics
1 answer:
anastassius [24]3 years ago
4 0

Answer:

t=\frac{424-420}{\frac{26}{\sqrt{61}}}=1.202    

p_v =2*P(t_{(60)}>1.202)=0.234  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the true mean is NOT different from  420. So the specification is satisfied.

Step-by-step explanation:

Data given and notation  

\bar X=424 represent the sample mean

s=26 represent the sample standard deviation

n=61 sample size  

\mu_o =420 represent the value that we want to test

\alpha=0.01 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean is different from 420 or not, the system of hypothesis would be:  

Null hypothesis:\mu = 420  

Alternative hypothesis:\mu \neq 420  

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{424-420}{\frac{26}{\sqrt{61}}}=1.202    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=61-1=60  

Since is a two sided test the p value would be:  

p_v =2*P(t_{(60)}>1.202)=0.234  

Conclusion  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the true mean is NOT different from  420. So the specification is satisfied.

You might be interested in
The sum of two numbers is 70.<br> One number is 10 more the twice the other number.
GalinKa [24]

Answer:

20 and 50

Step-by-step explanation:

x + y = 70

y = 2x + 10

Use the substitution method:

y = 70 - x

y = 2x + 10

70 - x = 2x + 10

3x = 60

x = 20

x + y = 70

20 + y = 70

y = 50

<u>x = 20</u>

<u>y = 50</u>

<u />

4 0
3 years ago
Triangle KLM was dilated according to the rule
Anna35 [415]

Answer:

The statement that is true is;

The vertices of the image are closer to the origin than those of the pre-image

Step-by-step explanation:

The dilation rule is 0.75(x,y)= (0.75x, 0.75y)

 K (-4,4)----------( 0.75*-4,0.75*4)-------K' (-3,3)

 L (2,4)-----------(0.75*2,0.75*4)---------L' (1.5,3)

M (-2,2)----------(0.75*-2,0.75*2)--------M' (-1.5,1.5)

4 0
3 years ago
Read 2 more answers
Solve the equation for y: 2 y – 25 = 19
stealth61 [152]

Answer:

2y - 25 = 19

2y = 19 + 25

2y = 44

y = 44 / 2

y = 22

Hope it helps

4 0
3 years ago
283838383838382828 + 83838383888282ab
natta225 [31]

2.8392222e+17

Step-by-step explanation:

283838383838382828 + 83838383888282=2.8392222e+17

5 0
3 years ago
Mrs. Kitchell has graded 12 out of 48 papers so far. What percent of the papers has Mrs. Kitchell graded so far?
ioda
1/4 of the work so 25%!
7 0
2 years ago
Read 2 more answers
Other questions:
  • Plz help will give brainliest.....
    8·1 answer
  • Find (f+g)(9) if f(x)=2x2-2x+25 and g(x)=6x2+7x-13
    6·1 answer
  • Please help!!! I will mark brainliest
    15·2 answers
  • Can somebody help me with the question i asked before this.....please
    14·1 answer
  • What will be the amount in an account with initial principal $9000 il interest is compounded continuously at an annual rate of 3
    7·1 answer
  • Pls help me
    7·2 answers
  • Solve the word problems. The price of a bed was $2600. MDM Yap bought the bed and had to pay an additional 7% GST. (a) What was
    11·1 answer
  • List 21.3 ib 2064 g 16.7 kg 452 oz from least to greatst
    11·1 answer
  • B
    10·1 answer
  • A family spends $30,000 a year for living expenses. If prices increase by 5 percent a year for the next three years, what amount
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!