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
Romashka [77]
3 years ago
10

PLEASE TRY TO HELP !

Mathematics
1 answer:
Rufina [12.5K]3 years ago
5 0

Answer:

the photo is a little blurry I cannot answer the question unfortunately sorry

You might be interested in
Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.
Leona [35]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is X: flexural strength of concrete beams.

Data:

7.3 6.8 8.6 9.7 11.6 9.7 6.8 7.7 11.8 7.4 8.1 8.7 6.3 7.9 7.0 7.9 7.8 6.5 6.3 7.0 7.5 7.7 7.2 11.3 9.0 10.7 5.1

a.

The point estimate of the mean value is the sample mean. You calculate it using the following formula:

X[bar]= ∑X/n= 219.40/27= 8.1259≅ 8.13

b)x

b.

The point estimate that divides the sample in 50%-50% is the measure of central tendency called Median(Me).

To reach the median you have to calculate it's position (PosMe)

For uneven samples PosMe= (n+1)/2= (27+1)/2= 14 ⇒ This means that the Median is the 14th observation of the data set.

So next is to order the data from lower to heighest and identify the value in the 14th position:

5,1 ; 6,3; 6,3; 6,5 ; 6,8; 6,8; 7; 7; 7,2; 7,3; 7,4 ; 7,5 ; 7,7 ; 7,7 ; 7,8 ; 7,9 ; 7,9 ; 8,1 ; 8,6 ; 8,7 ; 9 ; 9,7 ; 9,7 ; 10,7 ; 11,3 ; 11,6 ; 11,8

Me= 7.7

d) x tilde

c.

The point estimate of the population standard deviation is the sample standard deviation. The standard deviation is the square root of the variance, so the first step is to calculate the sample variance:

S^2= \frac{1}{n-1}*[sumX^2-\frac{(sumX)^2}{n} ]

∑X²= 1858.92

S^2= \frac{1}{26}*[1858.92-\frac{219.40^2}{27} ] = 2.926

S= √2.926= 1.71

The standard deviation is a measurement of variability, it shows how to disperse the data is concerning the sample mean.

d. This estimate describes the spread of the data.

I hope it helps!

7 0
3 years ago
An arithmetic sequence is defined by its 1st term a1 = 7 and the sum of the first 10 terms s10 = 25. Find the difference d of th
VARVARA [1.3K]

Step-by-step explanation:

difference is 1.8

hope it is correct

3 0
2 years ago
In a school 2/3 parts of the total numbers of students. 3/10 parts are between 8 to 12 years and the remaining are above 12 year
ANEK [815]

3/10

As you know the answer already I don't think you need any further explanation :)

5 0
3 years ago
Given the equation f + 24 = −3, solve for f.
Anastasy [175]

Answer:

f=-27, hope this helped my love have a good rest of your day ^^

Step-by-step explanation:

subtract 24 from both sides

the you get f=-27

8 0
1 year ago
2. Reece is playing a carnival game in which he
Maslowich
25% or 2/4 and to win one game 50% or 1/2
6 0
3 years ago
Other questions:
  • I need help in 19.b.
    5·1 answer
  • Ryan earns x dollars every seven days. Write an expression for how much Ryan earns in one day. Ryan’s spouse Lee is paid twice a
    8·1 answer
  • Annie and Dustin took a beginner's programming course over several weekends that showed them how to make simple video games. The
    12·1 answer
  • a town Pharmacy in hospital is doing it as a part of format of the town has a scale 18840.35 miles what is the distance between
    11·1 answer
  • Without graphing, find the slope of the line that goes through the points, and write an equation for the line in slope-intercept
    15·1 answer
  • Find the area. Answer ASAP pls pls
    5·1 answer
  • 5m - 4z + 8m + 3 – 2z
    14·1 answer
  • Answer plz plz plz plz plz
    12·2 answers
  • 13.5 + 0.5n = 19.5 , solve for n
    14·1 answer
  • Compared to last year, the population has increased 25%. The population is now 6,600. What was the population last year?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!