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
avanturin [10]
3 years ago
10

A college entrance exam company determined that a score of 2222 on the mathematics portion of the exam suggests that a student i

s ready for​ college-level mathematics. To achieve this​ goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 150150 students who completed this core set of courses results in a mean math score of 22.722.7 on the college entrance exam with a standard deviation of 3.93.9. Do these results suggest that students who complete the core curriculum are ready for​ college-level mathematics? That​ is, are they scoring above 2222 on the math portion of the​ exam? Complete parts​ a) through​ d) below.
Mathematics
1 answer:
kolbaska11 [484]3 years ago
7 0

Answer:

Yes, Students are scoring above 2222 on the math portion of the​ exam.

Step-by-step explanation:

We are given that a college entrance exam company determined that a score of 2222 on the mathematics portion of the exam suggests that a student is ready for​ college-level mathematics i.e., population mean is 22.

Null Hypothesis, H_0 : \mu = 22 {Students are scoring equal to 2222 on the math portion of the​ exam}

Alternate Hypothesis, H_0 : \mu > 22 {Students are scoring above 2222 on the math portion of the​ exam}

Also, a random sample of 150 students who completed this core set of courses results in a mean math score of 22.7 on the college entrance exam with a standard deviation of 3.93 i.e.;

Sample mean, Xbar = 22.7    and Sample standard deviation, s = 3.93

The Test statistics is given by;

                            Z = \frac{Xbar -\mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

Test Statistics = \frac{22.7 -22}{\frac{3.93}{\sqrt{150} } } ~ t_1_4_9

                        = 2.1815

Since, we are not given with the significance level, so we assume it to be 5%. At 5% significance level t table gives critical value of 1.6578 at 149 degree of freedom. Since our test statistics is more than the critical value so we reject null hypothesis as our test statistics fall in the rejection region.

Therefore, we conclude that Students are scoring above 2222 on the math portion of the​ exam.

You might be interested in
If f(x) = -3x - 5 and g(x) = 4x - 2, find (f+ g)(x).
STALIN [3.7K]

Answer:

-40x

Step-by-step explanation:

f(x) =-3x-5

g(x) =4x-2

(f+g)(x) =?

now,

f(g(x))

=f(4x-2)

=-3×4x-2-5

=-10×4x

=-40x

7 0
2 years ago
Find the surface area of the triangular prism shown below.
ira [324]

Answer:

150ft²

Step-by-step explanation:

surface area = (2×½×8×3)+(8+5+5)×7

= 24+126

= 159 ft²

7 0
3 years ago
Solve for the value of c. ​
Ipatiy [6.2K]

Answer:

2c-4+5c+3 = 90

7c-1 = 90

7c = 91

c = 13

7 0
2 years ago
Complete the passage to describe velocity vs time graphs.A velocity vs time graph is a graph that shows the relationship between
Fiesta28 [93]
1)Time is plotted on the x-axis in seconds
2)Velocity of the object is plotted on the y-axis in meters per second
4 0
3 years ago
At noon, Manny's Café had 12 banana muffins, 10 chocolate muffins, 6 blueberry muffins, and 7 vanilla muffins. What is the proba
Ludmilka [50]
Its 1/5 likely because my teacher helped me with this problem you welcome:)
4 0
3 years ago
Other questions:
  • What type of number is π/2
    11·1 answer
  • WILL MARK BRAINLIST!! Olivia rolls two fair number cubes numbered from 1 to 6. She first defines the sample space as shown below
    11·2 answers
  • What is the value of 8 in 0.589
    9·1 answer
  • Samantha’s rectangular gift is 10 inches. by 12 inches and is framed with a ribbon. She wants to use the same length of ribbon t
    11·2 answers
  • 09 CP
    15·1 answer
  • Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 – x = 25
    12·1 answer
  • The function h(t)=-16t^2+75t+80 models the height in feet, h, of a ball as it is thrown into the
    8·1 answer
  • Can someone pls help with this i’m so confused
    14·1 answer
  • The tangent of the curve f(t) =2+nt+mt^2 at point (1,1/2) is parallel to the normal g(t)= t^2+6t+13(-2,2), calculate the values
    12·1 answer
  • A diamond ring costs $1,020 to manufacture and is sold in stores for $1,275. While, a ruby ring that normally sells for $290 is
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!