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
konstantin123 [22]
3 years ago
12

In one study of 300 coffee drinkers and 150 non coffee drinkers, it was found that only 67 of the coffee drinkers had high blood

pressure. The newspaper reported the published study and included the sentence, "You are 1.3 times more likely to have high blood pressure if you don’t drink coffee compared to if you do drink coffee." How many of the non coffee drinkers had high blood pressure?
Mathematics
1 answer:
Katarina [22]3 years ago
4 0
تبي الصراحه معرف الحل بس التطبيق ذا يخليني اجاوب على سؤالين عشان يخليني اسأل اسفه ماعرفت الإجابة بس يله حبتين ل عيون تشان.
You might be interested in
A survey of 225 students showed the mean number of hours spent studying per week was 20.6 and the standard deviations was 2.7
LekaFEV [45]

Answer:

The margin of error is approximately 0.3

Step-by-step explanation:

The following information has been provided;

The sample size, n =225 students

The sample mean number of hours spent studying per week = 20.6

The standard deviation = 2.7

The question requires us to determine the margin of error that would be associated with a 90% confidence level. In constructing confidence intervals of the population mean, the margin of error is defined as;

The product of the associated z-score and the standard error of the sample mean. The standard error of the sample mean is calculated as;

\frac{sigma}{\sqrt{n} }

where sigma is the standard deviation and n the sample size. The z-score associated with a 90% confidence level, from the given table, is 1.645.

The margin of error is thus;

1.645*\frac{2.7}{\sqrt{225}}=0.2961

Therefore, the margin of error is approximately 0.3

5 0
3 years ago
Read 2 more answers
he equation a = a equals StartFraction 180 left-parenthesis n minus 2 right-parenthesis Over n EndFraction. represents the angle
irina1246 [14]

Answer:

give more info ;)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Each student in a class plays one of three sports soccer, volleyball or basketball. 1/4 of them play soccer. 3/5 of them play vo
Setler79 [48]

Answer: 3/20 of the class

Step-by-step explanation:

Add the amount of students that play soccer to amount of students that play volleyball

1/4 + 3/5 = 17/20

Subtract 17/20 (soccer and volley ball) from 20/20 or 1

20/20 - 17/20 = 3/20

7 0
3 years ago
8.46 If 100 is decreased by a% and the result is decreased by b%, then what is the total percent decrease (in terms of a and b)?
Marysya12 [62]

Answer:

The total percent decrease is $a+b-\frac{a b}{100}$

Step-by-step explanation:

  • We are given with a word problem
  • We are asked to find the total percentage decrease
  • We can do this in two steps

         Step 1: Finding the two percentage decrease

         Step 2: Finding their difference

Step 1 of 2

Let the decrease by a% be 100-a

Then b% decrease is

$$\begin{aligned}\frac{b}{100} \times(100-a) &=\frac{100 b-a b}{100} \\\frac{100 b}{100}-\frac{a b}{100} &=b-\frac{a b}{100}\end{aligned}$$

Step 2 of 2

The percentage difference between the two percentages is,

$$\begin{aligned}&(100-a)-\left(b-\frac{a b}{100}\right)=100-a-b+\frac{a b}{100} \\&100-a-b+\frac{a b}{100}=100-\left(a+b-\frac{a b}{100}\right)\end{aligned}$$

Since 100 is the total percent $a+b-\frac{a b}{100}$ is the percentage decrease.

3 0
2 years ago
I'll name you the BRAINIEST if you can answer this.The scale factor for a model is 18 cm
bezimeni [28]

Answer:

  32.625 m

Step-by-step explanation:

You have the proportion ...

  18 cm : ___ m = 22.4 cm : 40.6 m

This can be rearranged to ...

  ___ m/(18 cm) = (40.6 m)/(22.4 cm)

Multiplying by 18 cm gives ...

  ___ m = (40.6 m)·(18/22.4)

  ___ m = 32.625 m

6 0
4 years ago
Other questions:
  • Carly paid $17.50 for 7 gallons of gas and Jade paid $45 for 15 gallons of gas. Which of the following statements is true?
    14·1 answer
  • Find the perimeter of a rectangle that had a length of 2x+ 7 and a width of 5x
    8·1 answer
  • The Grand Prix Formula 1 race this weekend is in Singapore. The race consists of 61 laps around a 5.067 km long track. At 225 mi
    15·1 answer
  • -|36| + | 7 | = what is the value
    14·2 answers
  • (20n^2+N^3+10n^2) /10N^2
    9·1 answer
  • Solve the compound inequality. -2x<2x-4<4
    13·2 answers
  • Given rectangle. Find area of trapezoid. (4 points)
    5·2 answers
  • 20 POINTS!!!
    5·1 answer
  • Molly, page and demi share 42 sweets in the ratio 3:2:1 how many sweets do the all get each
    12·1 answer
  • Will Give Brainliest,. Make Sure to Show your work.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!