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
julsineya [31]
2 years ago
9

PLEASE HELP! A class has an average score of 75%. A test is taken with an average score of 60%. The test is graded on a curve so

that 60%=75%. If Emalie's original score is 72%, what is her new grade after the curve? This is real life, as I'm trying to figure out my exam grade believe it or not!​
Mathematics
1 answer:
lord [1]2 years ago
7 0

Answer:

1.032%

Step-by-step explanation:

You might be interested in
A phone manufacturer wants to compete in the touch screen phone market. He understands that the lead product has a battery life
alisha [4.7K]

Answer:

a)

The null hypothesis is H_0: \mu \leq 10

The alternative hypothesis is H_1: \mu > 10

b-1) The value of the test statistic is t = 1.86.

b-2) The p-value is of 0.0348.

Step-by-step explanation:

Question a:

Test if the battery life is more than twice of 5 hours:

Twice of 5 hours = 5*2 = 10 hours.

At the null hypothesis, we test if the battery life is of 10 hours or less, than is:

H_0: \mu \leq 10

At the alternative hypothesis, we test if the battery life is of more than 10 hours, that is:

H_1: \mu > 10

b-1. Calculate the value of the test statistic.

The test statistic is:

We have the standard deviation for the sample, so the t-distribution is used to solve this question

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.

10 is tested at the null hypothesis:

This means that \mu = 10

In order to test the claim, a researcher samples 45 units of the new phone and finds that the sample battery life averages 10.5 hours with a sample standard deviation of 1.8 hours.

This means that n = 45, X = 10.5, s = 1.8

Then

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{10.5 - 10}{\frac{1.8}{\sqrt{45}}}

t = 1.86

The value of the test statistic is t = 1.86.

b-2. Find the p-value.

Testing if the mean is more than a value, so a right-tailed test.

Sample of 45, so 45 - 1 = 44 degrees of freedom.

Test statistic t = 1.86.

Using a t-distribution calculator, the p-value is of 0.0348.

5 0
2 years ago
1. What are the zeros of the function?
Juliette [100K]
C. 

You can factor that equation to the following:

x(x - 3)(x + 2) 

Then set each part equal to zero and solve individually. 
4 0
3 years ago
Read 2 more answers
Amanda and Ndiba are selling flower bulbs for a school fundraiser. Customers can buy packages of tulip bulbs and bags of daffodi
Gemiola [76]

Answer is on the attachment. Brainlist pls.

Step-by-step explanation:

5 0
2 years ago
I need help with numbers 9and 10
AlekseyPX
For monthly membership, the cost must be less than $325. We can set up an inequality:-

100 + 30x < 325            where x = number of months of membership

Solving -

30x < 325-100 = 225

x < 225 / 30

x < 7.5 months

The answer is   7 months.
5 0
3 years ago
What is 1.2 called in a division problem?
PSYCHO15rus [73]

Answer:

depends

Step-by-step explanation:

Quotient means the answer

Dividend is the first number that is being divided

Divisor is the number dividing the first number

6 0
2 years ago
Other questions:
  • The image of (4, 1) under the transformation T : (x, y) → (x + 3, y + 1) is
    13·1 answer
  • The problem is: 2x-2(x-2y)+1/4(4x-12y)
    12·1 answer
  • If it takes a sprinter 10.3 seconds to run a distance of 100m. what is the runners average speed?
    6·2 answers
  • floodwalls are used to prevent damage from floods. A town built a floodwall 4 4/8 feet tall. Another town built a floodwall 7 1/
    8·1 answer
  • Which sequence is not equivalent to the others?
    10·2 answers
  • Giving brainleist. what is 9 + 10
    5·2 answers
  • Jemma has 24 balls. Out of the 24 balls, 12 are yellow, 4 are pink, and the rest are red. What is the ratio of the number of red
    6·2 answers
  • Marci, Bobby, and Max began their homework at the same time. Marci finished her homework in 60 minutes. Bobby finished his homew
    9·2 answers
  • Ayo help asap ??? so confusing anyways
    8·1 answer
  • How can I anwers this
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!