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
marissa [1.9K]
3 years ago
11

Liz flips a coin 60 times. The coin lands heads up 18 times and tails up 42 times. Complete each

Mathematics
1 answer:
olganol [36]3 years ago
3 0

Answer:

30%

Step-by-step explanation:

18/60 = .3 × 100% = 30%

You might be interested in
Which graph shows a non-proportional linear relationship between x and y?
andreev551 [17]

Answer: B

Because it does not pass through (0,0)

4 0
3 years ago
Read 2 more answers
A rectangular basketball court has perimeter of 232 feet. The length of the court is 32 feet greater that the width. What is the
Phoenix [80]

Answer:

width=100 feet and length=132feet

5 0
3 years ago
A concession stand sold ice cream cones, salted pretzels, and tacos at a basketball game. Ice cream cones were sold for $3.00, s
Nikitich [7]
I’m so hungry gurlll like stop playinn
4 0
3 years ago
A survey of 2,254 American adults indicates that 17% of cell phone owners browse the internet exclusively on their phone rather
GrogVix [38]

Answer:

We conclude that the proportion of Americans who only use their cell phones to access the internet is different than the Chinese proportion of 38%.

Step-by-step explanation:

We are given that a survey of 2,254 American adults indicates that 17% of cell phone owners browse the internet exclusively on their phone rather than a computer or other device. According to an online article, a report from a mobile research company indicates that 38 percent of Chinese mobile web users only access the internet through their cell phones.

We have to conduct a hypothesis test to determine if these data provide strong evidence that the proportion of Americans who only use their cell phones to access the internet is different than the Chinese proportion of 38%.

<em>Let p = proportion of Americans who only use their cell phones to access the internet</em>

SO, Null Hypothesis, H_0 : p = 38%  {means that the proportion of Americans who only use their cell phones to access the internet is same as that of Chinese proportion of 38%}

Alternate Hypothesis, H_a : p \neq 38%  {means that the proportion of Americans who only use their cell phones to access the internet is different than the Chinese proportion of 38%}

The test statistics that will be used here is <u>One-sample z proportion statistics</u>;

                 T.S. = \frac{\hat p-p}{\sqrt{\frac{\hat p(1- \hat p)}{n} } }  ~ N(0,1)

where, \hat p = proportion of cell phone owners who browse the internet

                 exclusively on their phone in a survey of 2,254 adults = 17%

          n  = sample of adults = 2,254

So, <em><u>test statistics</u></em> = \frac{0.17-0.38}{\sqrt{\frac{0.17(1- 0.17)}{2,254} } }

                            = -26.542

<em>Since in the question we are not given with the significance level so we assume it to be 5%. So, at 0.05 level of significance, the z table gives critical values between -1.96 and 1.96 for two-tailed test. Since our test statistics does not lie in between the critical values of z so we have sufficient evidence to reject null hypothesis as it will fall in the rejection region.</em>

Therefore, we conclude that the proportion of Americans who only use their cell phones to access the internet is different than the Chinese proportion of 38%.

3 0
3 years ago
How many degrees of freedom will the error have in a randomized block design with five treatments and three blocks?
Thepotemich [5.8K]

Answer:

<h3>A. 2 </h3>

Step-by-step explanation:

Degree of freedom is expressed according to the formula as shown;

Degree of freedom = Sample size (Treatments) - number of parameters(Block)

Given

Number of treatments = 5

Number of blocks = 3

Degree of freedom = 5 - 3

Degree of freedom = 2

Hence the error will have 2 degrees of freedom in the randomized block design.

4 0
3 years ago
Other questions:
  • Let f(x) = 5x + 6 and g(x) = -7x - 4. <br> Find f(x) + g(x)
    5·1 answer
  • A right triangle has a vertex at point M and a height of 5 units. The base of the triangle is on MN←→− and is 3 units long. One
    9·2 answers
  • Fred and George had some savings in the ratio 3 : 4 respectively.

They decided to buy a birthday present for their little siste
    9·1 answer
  • Three runners — Andy, Blaise, and Susie — were competing in a 100-meter race. When Andy reached the finish line, Blaise was 10 m
    11·2 answers
  • Please answer and show steps please show steps please show steps 10 points
    13·1 answer
  • From 3a-2b subtract 2a+3b
    5·1 answer
  • Jasmine gets paid to do chores around her house. She earns $3.00 every 20 minutes that she cleans the gutters. She earns $3.60 e
    9·1 answer
  • janelle and Jacob are considering a $130,000 mortgage for 30 years at 4.8%. With this information, their monthly payment would b
    6·1 answer
  • Ruth wants to purchase a new video game that costs $59.00 and several bags of chips that sell for $1.99 each. She can spend no m
    12·1 answer
  • Find an expression which represents the difference when (-5x-y) is subtracted from (9x+2y) in simplest terms.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!