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
Leno4ka [110]
3 years ago
5

Deaths of Mt. Everest climbers were first recorded in 1921. From that time through March 21, 2013, there have been 240 deaths. T

he total number of deaths from falling is 65. This number is 13 more than twice the number who died of exposure/ frostbite. How many climbers died of exposure/ frostbite?
Mathematics
1 answer:
Ymorist [56]3 years ago
7 0
The total of climbers that died of exposure/frostbite is 175 climbers
You might be interested in
Social media is popular around the world. Statista provides estimate of the number of social media users in various countries in
amm1812

Answer:

Kindly check explanation

Step-by-step explanation:

The data table :

Use of SM _UK _China _ Russia _US _ col total

Yes ______480 __215 ___343 __640 _ 1678

No _______320 _ 285 ___357__ 360 _ 1322

Row Total__ 800 _500 __ 700_ 1000_ 3000

H0 : p1 = p2 = p3 = p4

H1 : p1 ≠ p2 ≠ p3 ≠ p4

Test statistic :

χ² = Σ(observed - Expected)² / Expected

Expected value of each cell = (Row total * column total) / N

N = grand total

Expected Values:

447.467 _279.667 _ 391.533 _ 559.333

352.533 _ 220.333 _ 308.467 _ 440.667

χ²=(2.36536+14.9527+6.01605+11.6337+3.00232 18.9793+7.63611+14.7665) = 79.352

Degree of freedom, df = (row-1)*(column-1) = (2 - 1) * (4 - 1) = 1 * 3 = 3

Using the Pvalue from Chisquare calculator :

Pvalue(79.352, 3) = 0.00000000001

Decision region :

Reject H0 ; If Pvalue < α

α = 0.05

Since 0.000000001 < 0.05 ; Reject H0 and conclude that not all population proportion are equal.

Sample proportion :

Phat = number of yes, x / total

For UK, Phat = 480/800 = 0.6

For China , Phat = 215/500 = 0.43

For Russia , Phat = 343/700 = 0.49

For US, Phat = 640/1000 = 0.64

7 0
3 years ago
Michael is using a number line to evaluate the expression –8 – 3. A number line going from negative 12 to positive 12. A point i
Nata [24]

Answer:

move to the left 3 more spaces

Step-by-step explanation:

you are at -8 already. Therefore, you (-3) more spaces, so you go to the left three more spaces. Use the saying keep change change to help with this.

Keep the first number sign, change the next sign, and the next sign.

6 0
3 years ago
From the top of a building, 40 feet above the ground, a construction worker locates a rock at a 12° angle of depression. How far
MA_775_DIABLO [31]

Answer:

188 m

Step-by-step explanation:

\tan(12)  =  \frac{40}{x}  \\ x =  \frac{40}{ \tan(12) }  \\ x = 188

6 0
3 years ago
Read 2 more answers
If 1 card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is a king?
Ahat [919]

Answer:

1/13 chance or roughly 7.7% chance.

Step-by-step explanation:

There are 4 Kings in a standard 52-card deck. If one King was to be pulled out, you'd get a probability of 4/52 chance of pulling a king. Simplified, 4/52 is  1/13 chance.

5 0
3 years ago
An independent-measures research study uses a total of 18 participants to compare two treatment conditions. If the results are u
Luba_88 [7]

Answer:

The answer is false

Step-by-step explanation:

In a sample above 30 obs  like this the confidence interval is defined as

X+- t* (s/sqrt(n)) where X is the mean t the tvalue for a given confidence level, n the size of sample and s standar deviation.

To find de appropiate value of t we must see the T table where rows are degrees of freedom and columns significance level

The significance is obtained:

significance = 1 - confidence level = 1 - 0.9 = 0.10

Degrees of freedom (df) for the inteval are

df = n - 1 = 18 - 1 = 17

So we must look for the value of a t with 17 values and significance of 0.10 which in t table is 1.740 not 1.746 ( thats the t for 16 df)

6 0
3 years ago
Other questions:
  • Year 1978 1979 1980 1990 1991 1996 1997 2007 2008 2009 Minimum hourly wage ($) 2.65 2.90 3.35 3.80 4.25 4.75 5.15 5.85 6.55 7.25
    6·1 answer
  • How to Solve (3/4+1/2)
    14·1 answer
  • Which equation is the inverse of y=100-x2
    11·2 answers
  • -6-5(4+3n)=-7(n+2)-6n
    8·1 answer
  • For the following pair of lines, identify the system by type.
    11·2 answers
  • What is the sum of the numbers as the product of their GCF and another sum ( 30+54)
    6·1 answer
  • Find zeros and y intercept of each function algebraically f(x)=x^3-10x^2+24x
    14·1 answer
  • Laura borrowed $1,990 at 5% for 2 years. what was the total interest?
    12·1 answer
  • Admission to a theme park is $32 per adult and $20 per child. In order to pay the
    12·1 answer
  • Deleria says that you
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!