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Serjik [45]
3 years ago
5

3. Remember from your earlier work in statistics that distributions were described using shape, center, and spread. How was spre

ad measured?
Mathematics
1 answer:
Kruka [31]3 years ago
8 0

Answer: the highest minus the lowest

Step-by-step explanation: Spread in statistics is refers as the range of the distribution. It is the highest value or observation minus the lowest value or observation in a distribution. it measures the difference between the highest and the lowest value

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Simplify the following expression.
goldenfox [79]

Answer:

correct answer is -35

Step-by-step explanation:

simplify the expression

4 0
3 years ago
Sixty percent of U.S. adults trust national newspapers to present the news fairly and accurately. You randomly select nine U.S.
Pavel [41]

Answer:

a) 0.251

b) 0.483

c) 0.0994

Step-by-step explanation:

We are given the following information:

We treat adult adults trusting national newspapers to present the news fairly and accurately as a success.

P(Adult trust) = 60% = 0.6

Then the number of adults follows a binomial distribution, where

P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}

where n is the total number of observations, x is the number of success, p is the probability of success.

Now, we are given n = 9

a) exactly five

P(x = 15) = \binom{9}{5}(0.6)^{5}(1-0.6)^{9-5} = 0.2508 \approx 0.251

b) at least six

We have to evaluate

P(x \geq 6) = P(x = 6) + P(x = 7) + P(x=8) + P(x=9) \\= \binom{9}{6}(0.6)^6(1-0.6)^3 + \binom{9}{7}(0.6)^7(1-0.6)^2 + \binom{9}{8}(0.6)^8(1-0.6)^1 +\binom{9}{9}(0.6)^9(1-0.6)^0\\= 0.482609 \approx 0.483

c) less than four

We have to evaluate

P(x < 4) = P(x = 0) + P(x = 1) + P(x=2) + P(x=3) \\= \binom{9}{0}(0.6)^0(1-0.6)^9 + \binom{9}{1}(0.6)^1(1-0.6)^8 + \binom{9}{2}(0.6)^2(1-0.6)^7 +\binom{9}{3}(0.6)^3(1-0.6)^6\\= 0.099352 \approx 0.0994

3 0
3 years ago
The cosine function for a specific angle in a triangle is defined by the ratio of the triangle's A. adjacent side and hypotenuse
Snowcat [4.5K]

A. adjacent side and hypotenuse.


5 0
3 years ago
You start driving north for 3 miles, turn right, and drive east for another 4 miles. At the end of driving, what is your straigh
nalin [4]

The straight line distance is 5 miles from starting point.

Step-by-step explanation:

Driving 3 miles north and 4 miles east and then the straight line distance will form a right angled triangle.

Where;

One leg =  a = 3 miles

Other leg = b = 4 miles

Hypotenuse = c

Using Pythagoras theorem;

a^2+b^2=c^2\\(3)^2+(4)^2=c^2\\9+16=c^2\\c^2=25

Taking square root on both sides

\sqrt{c^2}=\sqrt{25}\\c=5

The straight line distance is 5 miles from starting point.

6 0
3 years ago
Which description can be written as the expression n/4-13
Rom4ik [11]

Order of operations rules are important here:  n/4-13

We must do the division first.  Thus, n/4-13  translates to "the quotient of n and 4, less 13."

7 0
3 years ago
Read 2 more answers
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