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
umka2103 [35]
3 years ago
6

A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition. T

he mean score on the final exam for a course using the old edition is 75. Ten randomly selected people who used the new text take the final exam. Their scores are shown in the table below. Person A B C D E F G H I J Test Score 92 83 93 74 85 97 88 70 69 79 Use a 0.010.01 significance level to test the claim that people do better with the new edition. Assume the standard deviation is 10.5. (Note: You may wish to use statistical software.)
Mathematics
1 answer:
Oksanka [162]3 years ago
7 0

Answer:

The null and alternative hypotheses are:

H_{0}:\mu=75

H_{a} : \mu>75

Under the null hypothesis, the test statistic is:

t=\frac{\bar{x}-\mu}{\frac{s}{\sqrt{n}} }

Where:

\bar{x} =83 is the sample mean

s=9.8206 is the sample standard deviation

n=10 is the sample size

\therefore t= \frac{83-75}{\frac{9.8206}{\sqrt{10}} }

         =2.58

Now, we can find the right tailed t critical value at 0.01 significance level for df = n-1 = 10 - 1 = 9 using the t distribution table. The t critical value is given below:

t_{critical} =2.821

Since the test statistic is less than the t critical value, we therefore, fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the people do better with the new edition.

You might be interested in
Which term is a synonym for atmosphere? tone mood action conflict
Ira Lisetskai [31]

Answer: Mood

Step-by-step explanation: It would be mood because when you put it in a sentence it makes the most sense.

Example Sentence: The atmosphere of the room is sad.

The mood of the room is sad.

The other answers don't make as much sense. Hope this helps!

6 0
3 years ago
Read 2 more answers
Choose the best definition for the following term: substitution
Tatiana [17]
The best definition for the term substitution would be...

the action of replacing someone or something with another person or thing.
8 0
3 years ago
Read 2 more answers
Brainliest + Points!
sleet_krkn [62]
0.33% because you just divide both of them together, I will show my work on paper, it will take a second

work:

3 0
3 years ago
Read 2 more answers
What does the y-coordinate have to be for a point to be on the x-axis?​
vesna_86 [32]

Step-by-step explanation:

If we're talking about something like y coordinate being on the x axis, I'd have to say 0. Because it would be on the y axis no matter the coordinates of it isn't a 0. Ex : (0,0) and (0,9). (0,9) would have the point going upwards on the y axis.

3 0
1 year ago
What is the solution to the inequality -3x - 42 > 3
rosijanka [135]

Answer:

I don’t know which answer choice it is since C and D are the same but the answer is supposed to be x < -15.

Step-by-step explanation:

the image has the work shown

5 0
2 years ago
Other questions:
  • A bag contains 6 blue marbles, 4 red marbles, and 2 yellow marbles. What is the probability of selecting a blue marble, replacin
    8·2 answers
  • Will mark Brainliest!!
    14·1 answer
  • Raul and his friends, each of whom weighs 1/20 of a ton, are standing on a truck scale. The total weight shown by the scale is 3
    8·1 answer
  • CAN ANYONE PLS HELP ME IN THIS PLS I WILL MARK U AS BRAINLIEST :) and pls show work
    9·2 answers
  • Cara is trying to drink more water. She wants to drink 212
    11·1 answer
  • How do arithmetic sequences and series differ?
    15·2 answers
  • 1) Lisa took a trip to Kuwait. upon leaving she decided to convert all of her dinars back into dollars . how many dollars did sh
    9·1 answer
  • Mya applied the distributive property to write the equivalent expressions below
    9·2 answers
  • PLEASE HELP IN ATTACHED IMAGE
    5·2 answers
  • From the diagram below, if the tree is 34 ft. tall, and the angle of elevation from point B to the top of the tree is 26 °, find
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!