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
ANTONII [103]
2 years ago
15

a distribution for the last difit of phone numbers sampled from a phone book for the phone number 968-9667 the last difit 7 woul

d be seleced is represented by
Mathematics
1 answer:
lisov135 [29]2 years ago
7 0

Answer:

The answer is "Option D".

Step-by-step explanation:

Please find the attached file of the complete question:

In this question, the last choice "Histogram IV" is correct because it would be roughly evenly distributed.

You might be interested in
Professor Doom has applied to the town planning board to build a Villain's Lair in a suburban neighborhood. The local residents
tester [92]

Answer:

Check explanation below.

Step-by-step explanation:

Hello!

The objective of this experiment is to test if doctor Doom is controlling the neighbors' minds from his new Lair. To test this a random sample of 11 neighbors was taken and a "free will" test was administrated before the Villain's Lair was constructed and again after it was finished.

This experiment type where you have a single sample and the variable is measured "before" and "after" applying a treatment (in this case, that doctor Doom has moved into town) is a classic example of a paired sample test. You have two dependent variables, X₁: "Results of the free will test before Dr. Doom Lair is constructed" and X₂: "Results of the free will test after Dr. Doom Lair is constructed", with these variables you can establish a new variable, Xd, that I'll define as " X₁- X₂", and the objective of my hypothesis test will be to know if there is any change after the Lair is done, if there is, in fact, a change then the population mean of the difference will be nonzero, symbolically: μd ≠ 0

Using the data I've calculated the summary measures for Xd:

sample mean: Xd[bar]= 3.18

sample standard deviation: Sd= 5.44

The statistic hypothesis is:

H₀: μd = 0

H₁: μd ≠ 0

α: 0.05

(There is no signification level specified, so I've chosen the most common one)

Assuming that the variable difference, Xd, has a normal distribution, and with unknown population variance, the best statistic to use is the Students-t for paired samples:

t=  Xd[bar] - μd  ~t_{n-1}

Sd/√n

This test is two-tailed, so you will reject at low values of the statistic or at high values of it.

t_{n-1;\alpha/2 } = t_{10; 0.025} = -2.228

t_{n-1; 1-\alpha /2} = t_{10; 0.975} = 2.228

If t ≤ -2.228 or t ≥ 2.228 then you reject the null hypothesis.

If -2.228 < t < 2.228 then you don't reject the null hypothesis.

t= <u> Xd[bar] - μd  </u> =  <u> 3.18 - 0  </u> = 1.94

        Sd/√n             5.44/√11

Since the statistic value t= 1.94 then the decision is to not reject the null hypothesis.

So, with a significance level of 5% there is not enough evidence to reject the null hypothesis, this means that the population mean of the difference on the free will test results of the neighbors before and after the Villain's Lair was constructed is equal to cero. In other words, there is not enough evidence to conclude that Dr. Doom is controlling the neighbor's minds.

I hope it helps!

3 0
2 years ago
Graph x^2 +8x+4y+8=0
Afina-wow [57]

Answer:

x        y

− 6      1

− 5       7 /4

− 4        2

− 3       7 /4

− 2        1

Step-by-step explanation:

5 0
3 years ago
70 points
Verizon [17]

Answer:

500

All of the above

paying your balances off in full

make credit card purchases that you know you can pay back within a month

0% interest for 1 year and 12% interest after that

0% interest for 1 year and 12% interest after that

paying your balances off in full

all of the above

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
a rectangle has an area of x2+8x+15 square meters and a width of x+3 what expression represents the length of the rectangle
anzhelika [568]

Answer:

1x + 5

Step-by-step explanation:

Since the area of a rectangle of width w and length l is A = l*w,

length = Area / Width.

Here,                             x^2 + 8x + 15

length of rectangle  = ----------------------

                                            x + 3

Use synthetic division to perform the above.  The coefficients of the quadratic are a = 1, b = 8 and c = 15, and the divisor is -3 (from (x + 3).

-3      /  1        8        15

                    -3        -15

        -------------------------

            1         5        0

Since the remainer is zero (0), -3 is a root and 1x + 5 is a factor of the quadratic.  This factor, representing the length of the rectangle, is 1x + 5.

Next time, kindly share the answer choices.  Thank you.

6 0
3 years ago
Ethan buys 4 packs of muffins. He uses a Coupon and saves $2 off the total.
Oksanka [162]

Answer:

B bro its easy math nothing hard

7 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ME PLZZ, I AINT GOT A BRAIN
    11·2 answers
  • Which equation has the solutions x = 1+ V5?
    7·1 answer
  • Which of the following is the graph of y=5?
    6·2 answers
  • What percent of 29 is 3?
    8·2 answers
  • Select Is a Function or Is not a Function to correctly classify each relation
    14·1 answer
  • What is the slope of the line that goes through (-5,-5) and (5,-7)?
    12·2 answers
  • Please help determine the range
    15·1 answer
  • Suppose a great white shark was 4 feet long at birth. Now it's five times longer than that. How long is the great white now?
    9·2 answers
  • A fitness center will install a square hot tub in a 6 meter by 6 meter room. They want the tub to fill no more than 75% of the r
    7·1 answer
  • Meg surveyed some students at her school about their favorite professional sports. Of the students surveyed, 2 said football was
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!