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
Basile [38]
3 years ago
11

A national poll reported that 58% of those with Internet access have made purchases online. To investigate whether this percenta

ge applies to its own state, a legislator commissions a study. A random sample of 400 state residents who have Internet access is taken. Of those 400 respondents, 215 said that they have made purchases online. Does this sample provide sufficient evidence to conclude that the state differs from the nation with respect to making purchases online? Suppose the significance level is 0.05.
Mathematics
1 answer:
Lesechka [4]3 years ago
7 0

Answer:

Null Hypothesis is accepted

Conclusion : proportion of people with internet access having made online purchase = 58%

Step-by-step explanation:

Let proportion of people with internet access having made online purchase = x

Null Hypothesis [H0] : x = 58% = 0.58

Alternate Hypothesis [H1] : x ≠ 58% ≠ 0.58

Observed x proportion (mean) : x' = 215 / 400 = 0.5375

z statistic = [ x' - x ]  / √ [ { x ( 1-x ) } / n ]

( 0.5375 - 0.58 ) /  √ [ 0.58 (0.42) / 400 ]

= -0.0425 / √ 0.000609

= -0.0425  / 0.02467

z = - 1.72

Since calculated value of z, 1.72 < tabulated value of z at 0.05 significance level, 1.96

So, we accept the null hypothesis & conclude that x = 58%

You might be interested in
What is 6 divided by 131.4
zavuch27 [327]
Answer
0.045662100456621
6/131.4
8 0
3 years ago
Read 2 more answers
The ratio 4/7 to 8/9 has the unit rate 9/14
Setler79 [48]

Answer:

Answer:

true

Step-by-step explanation:

4/7 = 8/9

= 4*9/7*8

= 36/56

= 2*2*3*3/2*2*2*7

= 9/14

proved

Step-by-step explanation:

6 0
3 years ago
A ball is thrown with a slingshot at a velocity of 110 ft./sec. at an angle 20 degrees above the ground from a height of 4.5 ft.
Leviafan [203]

Answer:

T= 2.35 seconds

Step-by-step explanation:

⇒The question is on the time of flight.

⇒Time of flight is the time taken for a projected object to reach the ground.It depends on the <u>projectile angle</u> and the <u>initial velocity</u> of the projectile

Given;

Initial velocity of ball= 110ft./sec.

The projectile angle= 20°

Acceleration due to gravity, g=32 ft./s²

⇒Formulae for time of fright T= (2×u×sin Ф)/g

Where T=time of fright, u=initial velocity of projectile, Ф=projectile angle and g=acceleration due o gravity.

<u>Substituting values</u>

T= (2×u×sin Ф)/g

T=( 2×110×sin 20°) / 32

T= 2.35 seconds

3 0
3 years ago
Read 2 more answers
Solve by completing the square<br>3x2 + x - 2 = 0​
DIA [1.3K]

Answer:

x = 2/3 or x = -1

Step-by-step explanation by completing the square:

Solve for x:

3 x^2 + x - 2 = 0

Divide both sides by 3:

x^2 + x/3 - 2/3 = 0

Add 2/3 to both sides:

x^2 + x/3 = 2/3

Add 1/36 to both sides:

x^2 + x/3 + 1/36 = 25/36

Write the left hand side as a square:

(x + 1/6)^2 = 25/36

Take the square root of both sides:

x + 1/6 = 5/6 or x + 1/6 = -5/6

Subtract 1/6 from both sides:

x = 2/3 or x + 1/6 = -5/6

Subtract 1/6 from both sides:

Answer:  x = 2/3 or x = -1

3 0
3 years ago
Special right traingles (30, 60, 90<br> 45, 45, 90
igor_vitrenko [27]

Answer:

30

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Last question!!! please help!
    14·1 answer
  • What is the difference between a polynomial and a multinomial
    15·1 answer
  • the area of a rectangle is 162 square meters. if the length is 18 meters, what is the perimeter of the rectangle
    7·1 answer
  • A statistics teacher conducted an experiment to test whether the use of a new review booklet will improve her students' semester
    12·1 answer
  • PLEASE HELP ASAP!! GIVING AWAY BRAINLY if correct AND PLUS 50 pts
    9·2 answers
  • True or False<br><br> In order to multiply powers with the same base, we add their exponents
    9·2 answers
  • Which expression below is equivalent to the one below? 3 (2x+5)-(-5x+4)
    5·2 answers
  • What is the range of the function shown on the graph above? The graph is in the photo
    14·1 answer
  • Ava bought 2 1/4 pounds of ham for $7.65 at ShopRite last week. This week she bought 3 1/2 pounds of the same ham for $12.60 at
    6·1 answer
  • Explain what is wrong with each of the following randomization procedures, and describe how you would do the randomization corre
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!