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
SVETLANKA909090 [29]
3 years ago
14

In a recent poll^1 of 1000 American adults, the number saying that exercise is an important part of daily life was 753. Use stra

tegy or other technology to find a 90% confidence interval for the proportion of American adults who think exercise is an important part of daily life. The 90% confidence interval is_______________.
Mathematics
1 answer:
Annette [7]3 years ago
8 0

Answer:

The 90% confidence interval is between a lower limit of 0.7306 and an upper limit of 0.7754.

Step-by-step explanation:

Confidence interval for a proportion is given as p +/- margin of error (E)

p is sample proportion = 753/1000 = 0.753

n is sample size = 1000

confidence level = 90%

critical value corresponding to 90% confidence level and infinity degree of freedom is 1.645

E = critical value×sqrt[p(1-p) ÷ n] = 1.645×sqrt[0.753(1-0.753) ÷ 1000] = 1.645×sqrt[1.85991×10^-4] = 1.645×0.0136 = 0.0224

Lower limit of proportion = p - E = 0.753 - 0.0224 = 0.7306

Upper limit of proportion = p + E = 0.753 + 0.0224 = 0.7754

90% confidence interval is (0.7306, 0.7754)

You might be interested in
Solve for x.<br> Your answer must be simplified.<br> 17r &gt; -17
Snowcat [4.5K]

Hello :D

Answer:

\boxed{R>-1}

The answer should have a negative sign.

Step-by-step explanation:

First, you do is divide by 17 from both sides of an equation.

\frac{17r}{17}>\frac{-17}{17}

Then, you simplify and solve to find the answer.

-17\div17=-1

\boxed{R>-1}, which is our answer.

I hope this helps you!

Have a great day! :D

4 0
3 years ago
Read 2 more answers
What is the place value of 9 in 6545 . 965​
Lana71 [14]

Answer:

Tenths is the correct answer because the first digit after the decimal represents the tenths place. the next digit after the decimal represents the hundredths place the remaining digits continue to fill in the place values until there are no digits left.

4 0
3 years ago
Why is the answer A?
Marina86 [1]

Answer:

B) 2 frozen dinners and 2 dozen jelly doughnuts

Step-by-step explanation:

Calculate the total utility for each option.

A) 46

B) 32 + 21 = 53

C) 16 + 30 = 46

D) 28

Option B has the highest total utility.

4 0
4 years ago
URGENT PLEASE HELP 45 POINTS! Complete this activity. Given: f(x) = x + 2 <br><br> [f(x)] 2 =
ivanzaharov [21]

We are told that f(x) = x + 2. We want to find (f(x))^{2}.

Squaring f(x) on one side means we square x + 2 on the other.

So,

f(x) = x + 2

(f(x))² = (x + 2)²

= (x + 2)(x + 2)

We can use FOIL to square x + 2. The first terms multiply to x², the outside terms to 2x, the inside terms to 2x and the last terms to 4.

= x² + 2x + 2x + 4

= x² + 4x + 4


So [f(x)]² = x² + 4x + 4

3 0
3 years ago
33. Due to some error in a weighing scale, it shows the following reading when at rest (no weight is placed on it). Neerja measu
Komok [63]

Answer:

The traditional scale consists of two plates or bowls suspended at equal distances from a fulcrum. One plate holds an object of unknown mass (or weight), while known masses are added to the other plate until static equilibrium is achieved and the plates level off, which happens when the masses on the two plates are equal. The perfect scale rests at neutral. A

5 0
2 years ago
Other questions:
  • Breaking stuff let {xi} n i=1 be a sample of random variables of size n with the property that xi ∼ n (µ, σ2 ) and cov(xi , xj )
    13·1 answer
  • Which equation results from adding the equations in this system?<br><br> -8x+8y=8<br><br> 3x-8y=-18
    14·2 answers
  • HELP me please look at the picture
    13·2 answers
  • How do I found the surface area of a 3 by 3 by 3 square?????
    14·2 answers
  • Put the following numbers in order from least to greatest.<br> 8, -6, 4.7, - 24/10 , 45/5
    5·2 answers
  • Please help quick it is for eighth grade
    11·1 answer
  • The ratio of 96/3 please help
    12·1 answer
  • 9x2 - 80x - 100<br> Qué respuesta es?
    11·1 answer
  • If y = 4x + 0.5, find y when x =1.5
    8·1 answer
  • Help help math math
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!