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
just olya [345]
3 years ago
5

n a study to investigate whether vitamin C will prevent colds, 400 subjects are assigned at random to one of two groups. The exp

erimental group takes a vitamin C tablet daily, while the control group takes a placebo. At the end of the experiment, the researchers calculate the difference between the percentage of subjects in the two groups who were free of colds. This difference is statistically significant (P=0.03) in favor of the vitamin C group.
Mathematics
1 answer:
Dvinal [7]3 years ago
8 0

Answer:

Step-by-step explanation:

The aim of this question is to see if we can infer and conclude that vitamin C has a good impact in preventing colds based on the evidence provided.

Null hypothesis: Vitamin C has no effect on preventing colds.

Alternative hypothesis: Vitamin C has a strong effect on preventing colds.

Assuming, significance level = 0.05

Since the p-value for the difference is 0.03 which is less than 0.05.

Hence, the null hypothesis is rejected (which is there is no effect of vitamin C).

As a result, it can be concluded that Vitamin C has a major impact on the prevention of colds.

You might be interested in
Y
meriva

Answer:

67.38

Step-by-step explanation:

SinX=opp/hyp

Angles then arcsin

7 0
2 years ago
Miles and Lucy decide to sell lemonade to earn some money. They buy pitchers, ice, and mix for a cost of $13.50. The mix makes 8
sleet_krkn [62]

Answer:

Altogether they made $24 which is enough to earn $12 each

Step-by-step explanation:

Important information:

1 cup: $0.75

4 cups = 1 quart

8 quarts of lemonade altogether

If we are looking to solve for the revenue earned based on quarts, we must first solve for how much money they make on 1 quart

Since 1 cup sells for $0.75 and 4 cups makes up a quart, we must multiply

0.75 × 4 = 3

They make $3 per 1 quart

We are looking for the amount for 8 quarts though, not just 1. Again we must multiply

3 × 8 = 24

They will make $24 if they sell all 8 quarts

The questions ask if they will <em>each</em> earn $12

Since there are two of them, Miles and Lucy, we must divide revenue earned by 2, the number of people

24 ÷ 2 = 12

$12

3 0
2 years ago
A ratio compares the relative sizes of ______ quantities .​
Andre45 [30]

Answer:

two

Step-by-step explanation:

A ratio compares the relative sizes of two quantities .​

4 0
3 years ago
What numbers 60, 90, 30, and 45 mean in each ratio statement?
zmey [24]

Answer:

Step-by-step explanation:

30 is half or 60

45 is half of 90

1:2 ratio

3 0
2 years ago
HELPPP ASAPPP DUE SOONN
Andru [333]

The friction force exerted on the 2400kg car is 9408 Newtons

<h3>What force will be exerted on the 2400kg car?</h3>

First, we know that the friction force and mass are represented by a proportional relation, this means that we can write:

F = k*M

Where F is the force, M is the mass and k is the constant of proportionality.

We know that for a 1600kg car, a force of 6272N is exerted, replacing that we get:

6272N = k*1600kg

Solving for k we get:

k  = (6272N)/(1600 kg) = 3.92 N/kg

Then the proportional relationship is:

F = (3.92 N/kg)*M

So if M = 2400kg, we have:

F = (3.92 N/kg)*2400kg = 9408 N

So the friction force exerted on the 2400kg car is 9408 Newtons

If you want to learn more about proportional realtions:

brainly.com/question/12242745

#SPJ1

8 0
2 years ago
Other questions:
  • The problem is: 2x-2(x-2y)+1/4(4x-12y)
    12·1 answer
  • Solving one step equations
    13·2 answers
  • WILL GIVE BRAINLIEST. Tickets to a show cost $3 for students and $7 for adults. If 250 tickets were sold and ticket sales totale
    15·2 answers
  • The company charges $ a0 per hour What is the value of b2 - 4ac for the following equation? x(x + 8) = 9
    6·1 answer
  • What is the solution to the equation 3.6m − 2.7 = −1.8m?
    7·2 answers
  • A dice is rolled 2 times. What is the probability of showing a 5 on every roll Round to 4 decimal places
    7·1 answer
  • Please help with this question
    5·1 answer
  • What is the probability that they both choose a card labeled dog?
    15·1 answer
  • Someone help and please make sure it’s right
    11·2 answers
  • What is the sum of the polynomials?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!