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
PolarNik [594]
3 years ago
14

In monitoring lead in the air after the explosion at the battery factory, it is found that the amounts of lead over a 6 day peri

od had a standard error of 1.93. Find the margin of error that corresponds to a 95% confidence interval. (Round to 2 decimal places)
Mathematics
1 answer:
liubo4ka [24]3 years ago
3 0

Answer:

The margin of error that corresponds to a 95% confidence interval is 4.96.

Step-by-step explanation:

We have the standard error(which is the same as the standard deviation of the sample), so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. There are 6 days, so

df = 6 - 1 = 5

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 35 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975([tex]t_{0.975}). So we have T = 2.5706

The margin of error is:

M = T*s = 2.5706*1.93 = 4.96

The margin of error that corresponds to a 95% confidence interval is 4.96.

You might be interested in
Write an equation of a line in slope intercept form that is parallel to y = 3x+6 and passes through the point (-10, 2.5)
TiliK225 [7]

1) Line should be parallel to y = 3x+6, so slope of this line should be =3.

y=mx +b

y=3x +b

Now we have to find b (y-intercept), using the point (-10, 2.5).

2.5 = 3*(-10)+b

b=2.5+30=32.5

y=3x + 32.5

2) The line should be perpendicular to y = -4x -2, so its slope is going to be negative reciprocal m= 1/4.

Now we have to find b (y-intercept), using the point (-16, -11).

y=(1/4)x +b

-11=(1/4)*(-16) + b

-11 = -4 +b

b = -7

y=(1/4)x - 7

3 0
3 years ago
The perimeter of a parallelogram is 180 cm. One side exceeds the other by 10 cm. What are the lengths of adjacent sides of the p
Georgia [21]

Answer:

one side is 40 other is 50

Step-by-step explanation:

perimeter=180cm

let one side=length=x

Acc. to condition:

other side=width=x+10 (one side exceed other by 10)

perimeter= 2(length+width)

subtitue all values given above:

180=2(x+x+10)

180=2(2x+10)

2x+10=180/2

2x+10=90

2x=90-10

2x=80

x=40

now

lenght=x=40cm

width=x+10=40+10

width=50cm

8 0
3 years ago
What would be the awnsers
Fittoniya [83]
The answer would be 42
8 0
3 years ago
Write an equation that gives the proportional relationship of the graph.
labwork [276]

Answer:

C

Step-by-step explanation:

A proportional graph is a line. Every line has a slope. The slope is found by subtracting two points as a ratio. The line has points (0,0) and (2,6).

6-0 = 6

2 -0 = 2

The ratio is vertical over horizontal so 6/2 = 3.

The equation is y = 3x.

8 0
3 years ago
Read 2 more answers
The strip below is cut into 9 equal bars.<br> Shade 2/3 of this strip.
Anna35 [415]

Answer:

Shade 6 bars.

Step-by-step explanation:

You are asked to shade 2/3 of the strip. It is given that the strip has 9 equal parts. Multiply the number and fraction together:

9 * \frac{2}{3} = \frac{9}{1} * \frac{2}{3} = \frac{9 * 2}{1 * 3}   = \frac{18}{3} = 6

You will shade 6 of the 9 bars given.

~

5 0
2 years ago
Other questions:
  • Can some one help me find the area? The arrows are just answers that could be right.
    12·1 answer
  • What is the value of ×<br>×+3=10
    5·2 answers
  • Holly missed 7 of 185 school days this year. Approximately what percent of school days was Holly in attendance?
    13·1 answer
  • What is 50/400 simplified
    9·2 answers
  • Help Fast!!!WILL GIVE BRAINLIEST
    14·2 answers
  • The linear momentum is a constant when the mass varies inversely of the velocity. If the velocity is 16 meters per second and th
    6·1 answer
  • If a line with a slope of 6 crosses the y-axis at (0,-4), what is the equation of the line?
    15·2 answers
  • Each day, Robin commutes to work by bike with probability 0.4 and by walking with probability 0.6. When biking to work injuries
    7·1 answer
  • Which equation is correct regarding the measure of
    11·1 answer
  • Write the equation of a line in slope-intercept form with a slope of -1 and a y-intercept of -1. please answer b4 9:00 tdy ASAP.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!