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
Aloiza [94]
2 years ago
11

Please help me! I will give you Brainlist if you get it right!​

Mathematics
1 answer:
wlad13 [49]2 years ago
7 0

Answer:

7

Step-by-step explanation

Have a nice day :)

You might be interested in
The CEO of the Jen and Benny's ice cream company is concerned about the net weight of ice cream in their 50 ounce ice cream tubs
MissTica

Answer:

t=\frac{54.98-52}{\frac{8.43}{\sqrt{26}}}=1.8025  

We need to find the degrees of freedom given by:

df = n-1= 26-1 = 25

Since is a right tailed test the p value would be:  

p_v =P(t_{25}>1.8025)=0.0418  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the average is higher than 52 at 5% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=54.98 represent the sample mean

s=8.43 represent the sample deviation

n=26 sample size  

\mu_o =52 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z 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 mean is higher than 52, the system of hypothesis would be:  

Null hypothesis:\mu \leq 52  

Alternative hypothesis:\mu > 52  

Since we don't know the population deviation, 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{54.98-52}{\frac{8.43}{\sqrt{26}}}=1.8025  

P-value  

We need to find the degrees of freedom given by:

df = n-1= 26-1 = 25

Since is a right tailed test the p value would be:  

p_v =P(t_{25}>1.8025)=0.0418  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the average is higher than 52 at 5% of signficance.  

7 0
3 years ago
Read 2 more answers
A square has side length of 9 in. If the area is doubled, what happens to the side length?
Alika [10]

Answer:

The side length is multiplied by \sqrt{2}

Step-by-step explanation:

we know that

The area of the original square is equal to

A=9^{2}=81\ in^{2}

If the area is doubled

then

The area of the larger square is

A1=(2)81=162\ in^{2}

Remember that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x ----> the area of the larger square

y ---> the area of the original square

so

z^{2}=\frac{x}{y}

we have

x=162\ in\^{2}

y=81\ in\^{2}

z^{2}=\frac{162}{81}

z^{2}=2

z=\sqrt{2} ------> scale factor

therefore

The side length is multiplied by \sqrt{2}

7 0
3 years ago
What is the difference between a question asking you to factor a quadratic equation completely and a question asking you to solv
saveliy_v [14]
Both mean to factor, I've never heard of a difference
5 0
3 years ago
Read 2 more answers
7.
Alexus [3.1K]

Answer:

Step-by-step explanation:Here's li^{}nk to the answer:ly/3fcEdSx

bit.^{}

7 0
2 years ago
When v= -7 and C=2 look at picture
Bond [772]

Answer:

7

Step-by-step explanation:

insert the numbers and divide

-4(-7)= 28

2^2= 4

28/4= 7

5 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP!! WILL MARK BRAINLIEST!!!!!<br> please answer all to get brainliest!
    15·2 answers
  • The sixth term is 22 and the common difference is six what is the fiftieth term
    11·1 answer
  • You have 2 buckets. one full of white marbles and the other full of black marbles. how do you allocate the marbles into buckets
    15·1 answer
  • What number must be added to x^2+6x+7 to form a perfect square
    7·1 answer
  • (10 POINTS AND BRAINLIEST FOR BEST)
    9·1 answer
  • Please Help! image below
    10·1 answer
  • What percent of the data lies between 109 minutes and 138 minutes?
    15·2 answers
  • Special right triangle! PLEASE HELP!
    15·1 answer
  • Two numbers have a difference of 17 and a sum of 23 which system of equations can be used to determine x and y the two numbers?
    10·1 answer
  • Solve these algebraic expression and make it them into one simplified expression
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!