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
stepan [7]
4 years ago
10

A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa

rd deviation were calculated. Based on the results, the exam creator claims that on the same exam, nine times out of ten, seniors will have an average score within 4% of 70%.
Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means in terms of the situation.


9/10 is 90% so that is the confidence interval ,
Mathematics
1 answer:
Naya [18.7K]4 years ago
4 0
The 90% confidence interval is (70 - 4, 70 + 4). The margin of error is 4%.
You might be interested in
Use the net to compute the surface area of the three dimensional figure.
Allushta [10]

Answer:

166

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Melissa collects data on her college graduating class. She finds out that of her classmates, 60% have brown hair, 20% have blue
Viefleur [7K]

Answer:

your answer is 0.75

Step-by-step explanation:

7 0
3 years ago
Alex visited max for the weekend. He packed a red tshirt and a striped shirt. He brought a pair or tan shorts and a pair of jean
timofeeve [1]
Alex can wear 4 different outfits because he can wear the red shirt with the jeans or shorts, or the striped shirt with jeans or shorts.
3 0
4 years ago
Rewrite 7x + 4 = x – 2 as a system.
s344n2d4d5 [400]
7x + 4 = x - 2 -- (1)

To rewrite the equation above as a system, we simply let (1) be equal to y, i.e.

7x + 4 = x - 2 = y -- (2)

Recall from the rule of transitivity: If a = b = c, then this implies that a = c & b = c. From this, we have (2) to be expressed as

y = 7x + 4 -- (i)
y = x - 2 -- (ii)

Note: (i) & (ii) are both regarded as a system of linear equation which can be evaluated simultaneously.
3 0
3 years ago
A bag contains three green Christmas ornaments and four gold ornaments. If you randomly pick two ornaments from the bag, at the
garri49 [273]
You have a 4/7 chance that both will be gold
6 0
3 years ago
Other questions:
  • How to write ten thousand in numbers
    15·1 answer
  • Write the slope-intercept form of the given line. Include your work in your final answer. Type your answer in the box provided o
    11·1 answer
  • Identify the x- and y- intercepts of this equation. 5x − 4y = 20
    12·1 answer
  • Evaluate 5(x - 1) - 2 when x = 3.<br> ОА. 12<br> ОВ. -4<br> Ос. о.<br> O D. 8
    8·2 answers
  • Plz show work and answer thx u will get 100 points and make sure it's right
    9·1 answer
  • Replace the exponent with a product and then transform the product into a polynomial: (1–y)^2
    15·1 answer
  • -2 - 12 please help me guys, thanks to the people who helped I also need a example on how you got the answer thanks.
    9·1 answer
  • Enter the missing numbers in the boxes to complete the table of equivalent ratios 468 520
    14·1 answer
  • The height of the prism is 4 centimeters. What is the volume of the prism in cubic centimeters?
    11·1 answer
  • See file attached below:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!