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
Allisa [31]
2 years ago
9

We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.

3 words per minute. So, we choose a random sample of students' reading speeds. The sample has a mean of 28.2 words per minute and a standard deviation of 4 words per minute.
For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places.
Mathematics
1 answer:
stellarik [79]2 years ago
5 0

The test statistics based on the information given will be 0.238.

<h3>How to compute the test statistic?</h3>

Population mean = 28.3

Sample mean = 28.2

Standard deviation = 4

Sample size = 90

In this case, the z test will be used since the standard deviation is known. This will be:

= (28.2 - 28.3)/4/✓90

= -0.1/(4/9.48)

= -0.1/0.42

= -0.238

Learn more about hypothesis on:

brainly.com/question/11555274

#SPJ1

You might be interested in
I am a witch and I'll hex you if you don't know but answer to get the points
Alexeev081 [22]

2+1/3n=8 is the answer, I believe.

4 0
3 years ago
Read 2 more answers
triangle ABC has coordinates A(4, 1), B(2, 3), and C(7, 5). If the triangle is rotated 270° counterclockwise about the origin, w
Kitty [74]

Coordinates of a' would be (1,-4)

4 0
3 years ago
Drake wants to save $750 so that he can take a class on computer analysis for cars. The class is being held on various dates ove
STatiana [176]
C. Both options A and B will allow him to meet his goal.



Looking at Drake's situation after 4 weeks, he only has $470 saved. By his original plan, he should have had $500 saved. So he's $30 short of his goal and has 2 weeks until his originally planned class. If he goes with option A and takes the later class, he will save an additional $125 which is more than enough to make up the $30 short fall. So option A will work for him to save enough money for his class. With option B, he will save $140 for the last 2 weeks of his plan giving him a savings of $280 for the last 2 weeks. Adding the $470 he's already saved will give him a total savings of $470 + $280 = $750 which is enough for him to attend his class. So option B will also allow Drake to attend his desired class. Both options A and B allow him to meet his goal. Hence, the answer is "c".
8 0
3 years ago
Mathhhh helppppppppppppppppppp
Salsk061 [2.6K]
4. C)If two figures are congruent, then they are similar.
If they are congruent them shape and size are the same and hence they are similar

5. Ratio 4/3 smaller side is 21
Multiply to find large side
4/3×21= 28ft D)

6. Width went from 24 to 3 in divide to get ratio
24/3 =8 now divide the length by 8 to find the postcard length
32/8= 4 in A)

8. If they are similar you need to find the ratio y reduces from 8 is similar to 6 so link those 6/8
This is your ratio you can simplify it to 3/4 now y/6 should also = 3/4
Y/6=3/4
Y=18/4= 4.5 C)

9.C)DC

8 0
3 years ago
Read 2 more answers
Help please! I would really appreciate it!!!
Nutka1998 [239]

Answer:

the output is n+5

Step-by-step explanation:

3+5

4+5

8+5

n+5

6 0
3 years ago
Other questions:
  • Lori needs a twine 8.5 meters long to mark a row in her garden. Andrew needs a length of twine for 7.25 meter long for his row.
    6·1 answer
  • Please help me with this.
    13·1 answer
  • Tangent Line h(t) = sec t / t @ (Pi, 1/pi)
    7·1 answer
  • Mr. Douglas drove 2,482 miles. He spent 42.5 hours in the car driving. What was his average speed for the trip?
    6·1 answer
  • Find parametric equations for the line through (3, 1, 4) that is perpendicular to the plane x ? y + 2z = 9. (use the parameter t
    9·1 answer
  • Write a polynomial of least degree with roots 6 and. -8
    11·1 answer
  • Find the distance between the two points rounding to the nearest tenth (if necessary).
    11·1 answer
  • Screenshot of the question
    9·1 answer
  • Kesha had a recipe that required 1/3 pound of beef. 1 pound = 453.6 grams About how many grams of beef does she need
    14·2 answers
  • Nicole ate brunch at a restaurant. The bill came to $8. If she left an 18% tip, how much
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!