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
Bingel [31]
3 years ago
9

In November 2010, an article titled "Frequency of Colds Dramatically Cut with Regular Exercise" appeared in Medical News Today.

The article was based on the findings of a study by researchers Nieman et al. (British Journal of Sports Medicine, 2010) that followed 1,002 people aged 18–85 years for 12 weeks, asking them to record their frequency of exercise (5 or more days a week? Yes or No) as well as incidences of upper respiratory tract infections (Cold during last week? Yes or No.)
Mathematics
1 answer:
disa [49]3 years ago
5 0

Answer:

Part a

For the given study, the explanatory variable or independent variable is given as regularity or frequency of exercise. This variable is classify as categorical variable because variable is divided into two categories such as whether participant exercise 5 or more days a week or not.

Part b

For the given study, the response variable or dependent variable is given as frequency of colds. This variable is classified as quantitative variable because we measure the quantities or frequency of number of colds.

Part c

A confounding variable for this research study is given as incidence of upper respiratory tract infections that provides an alternative explanation for the lower frequency of colds among those who exercised 5 or more days per week, compared to those who were largely sedentary. This confounding variable is categorical in nature.

You might be interested in
A number that can be written as a fraction?
WITCHER [35]

Answer:

Rational Numbers

Step-by-step explanation:

7 0
3 years ago
Evaluate (-27)^-4/3 ((-27 to the power of -4/3))
masha68 [24]

Answer:

-1/81

Step-by-step explanation:

-27^-4/3

cbrt(-27^-4)

cbrt(-1/531441)

-1/81

5 0
3 years ago
Read 2 more answers
Write an equation in standard form of the line that contains the point (-2,4) and is parallel to (has the same slope as) the lin
CaHeK987 [17]

Answer:

The equation of the line in standard form is -8x + y = 20

Step-by-step explanation:

The standard form of the linear equation is Ax + By = C, where

  • A, B, and C are integers

The slope-intercept form of the linear equation is y = m x + b, where

  • m is the slope
  • b is the y-intercept

Parallel lines have equal slopes

∵ The line is parallel to the line y = 8x - 2

→ Compare it with the slope-intercept form above

∴ m = 8

∵ The parallel lines have the same slopes

∴ The slope of the line = 8

→ Substitute it in the slope-intercept form above

∴ y = 8x + b

∵ The line passes through the point (-2, 4)

∴ x = -2 and y = 4

→ Substitute x by -2 and y by 4 in the equation to find b

∵ 4 = 8(-2) + b

∴ 4 = -16 + b

→ Add 16 to both sides

∴ 4 + 16 = -16 + 16 + b

∴ 20 = b

→ Substitute the value of b in the equation above

∴ y = 8x + 20

→ Subtract both sides by 8x

∵ y - 8x = 8x - 8x + 20

∴ y - 8x = 20

→ Switch x and y

∴ -8x + y = 20

∴ The equation of the line in standard form is -8x + y = 20

8 0
3 years ago
Find and compare the median and
Over [174]

Answer:

Median= $2.45/2

=$1.225

Mode= $2.87

3 0
3 years ago
Lixins monthly income consists of a basic salary of $500 and a commission of 4percent on her sales for the month.If her income i
Harman [31]

Answer:

Lixins monthly sales = $18,000

Step-by-step explanation:

Let x be the total sales.

Given:

Basic salary = $500

Commission on sales = 4% = 0.04

Monthly income = $1220

We need to find her sales for the month.

Solution:

First we write the equation for given situation:

Total\ sales = Basic\ Salary + 0.04(Total\ sales)

S = 500 + 0.04x

1200=500+0.04x

0.04x=1220-500

0.04x=720

x = \frac{720}{0.04}

x = \$18,000

Therefore, Lixins monthly sales are $18,000.

8 0
3 years ago
Other questions:
  • Band students at Lowell High School sell candy every year as a fundraiser. Last year, they sold 90 boxes of truffles and 77 boxe
    11·1 answer
  • John divided his souvenir hat pins into two piles. The two piles had an equal number of pins. He gave his brother one-half of on
    10·1 answer
  • The sum of two numbers is 46 . the larger number is 12 more than the smaller number. what are the numbers?
    5·2 answers
  • You are converting 8 centimeters to meters. How will the<br> number of meters compare to 8? Explain.
    13·2 answers
  • If x = 1 and y = 2 and z = 3 what is <br> 10x³z²- 5x²y³/xyz²
    5·2 answers
  • Find the number of real number solutions for the equation. x2 – 10x + 25 = 0<br><br><br> 2<br><br> 1
    8·1 answer
  • In the diagram, the lenght of segment BC is 23 units. What is the lenght of segment DC?
    9·2 answers
  • Ok I have a couple of questions please help on the one you know please!!
    15·1 answer
  • Find the Area of the Trapezoid below *
    7·1 answer
  • The sum of nine and six-tenths and a number is thirteen and two-tenths. What is the number?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!