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
puteri [66]
3 years ago
5

A sample of 25 one-year-old girls had a mean weight of 24.1 pounds with a standard deviation of pounds. Assume that the populati

on of weights is normally distributed. A pediatrician claims that the standard deviation of the weights of one-year-old girls is less than pounds. Do the data provide convincing evidence that the pediatrician's claim is true
Mathematics
1 answer:
amid [387]3 years ago
5 0

Answer:

Paedtricians claim isn't true.

Step-by-step explanation:

The hypothesis :

H0 : σ = 7

H0 : σ > 7

The test statistic ; χ² :

χ² = [(n - 1) * s²] ÷ σ²

n = 25 ; s = 4.3, σ = 7

χ² = [(25 - 1) * 4.3²] ÷ 7²

χ² = [(24 * 4.3²] ÷ 49

χ² = 443.76 / 49

χ² = 9.056

At α = 0.01 ; critical value = 42.980

Since critical value > test statistic, we fail to reject the null, H0.

You might be interested in
9 is 1/10 of 90 yes or no
o-na [289]

9  is  1/10  of  90  yes.

7 0
4 years ago
Read 2 more answers
Rate of Change: Based on the equation determine the rate of change by looking at the coefficients.
Svetlanka [38]

Answer:

1) -1

2) 3

3) 2

7 0
3 years ago
What is the slope of the line in the graph?
algol [13]

Answer:

Slope = x or just 1/1

Step-by-step explanation:

y = x

4 0
3 years ago
Read 2 more answers
Exercice 4:
Bas_tet [7]
Huh english is this spanish !
7 0
3 years ago
How do you write (10, -6) and (-2, -6) as an equation
Paraphin [41]

Answer:

y=-6

Step-by-step explanation:

Method 1:

Both the y coordinates of the points are the same and the x coordinates are distinct.

Therefore the straight line passing through the point is parallel to X-axis.

The common y coordinate is -6, therefore the line equation is y=-6.

Method 2:

We will solve it using general line equation

(y-y1)=(\frac{y2-y1}{x2-x1})(x-x1)

where (x1,y1) and (x2,y2) are the 2 points.

  • (y+6)=(\frac{-6+6}{10+2})(x+2)
  • (y+6)=0
  • y=-6
4 0
3 years ago
Other questions:
  • What is the slope of a kine that is parallel to the line y =3/4x+2
    9·1 answer
  • 69% of 80 explain method
    9·2 answers
  • 125 feets in 5 minutes
    12·1 answer
  • Rachel owns a bike rental company. She charges an initial fee of $10 for each rental and an hourly rate of $4. Mike rented a bik
    14·1 answer
  • What is the area of the figure
    9·1 answer
  • Complete the remainder
    10·2 answers
  • The opposite value of -51
    11·2 answers
  • Mary is paid $600 for 5 days of work. How much is she paid per day
    14·1 answer
  • a ladder 6m long leans against the wall of house if the foot of the ladder makes an angle 58 degree with tye ground how far is t
    15·1 answer
  • 9 ft19 ftPlease refer to the rounding rules in the instructions.Circumference of the base = 59.5feetArea of the base = 254.3squa
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!