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lutik1710 [3]
3 years ago
13

Last week’s and this week’s daily high temperatures are shown in the table below. High Temperatures for This Week and Last Week

High Temperatures This Week (mc001-1.jpg) 65 73 73 74 73 75 71 High Temperatures Last Week (mc001-2.jpg) 68 51 62 66 85 72 72 How much greater is this week’s median temperature than last week’s median temperature? 2 degrees 3 degrees 4 degrees 5 degrees
Mathematics
2 answers:
Delicious77 [7]3 years ago
8 0
You must take the average of the last week and of the current week dividing the sum of the temperatures given between the amount of temperatures given.
 For the current week:
 (65 + 73 + 73 + 74 + 73 + 75 + 71) / 7 = 72
 For last week
 (68 + 51 + 62 + 66 + 85 + 72 + 72) / 7 = 68
 this week's medium temperature 4 degrees greater than last week's medium temperature
atroni [7]3 years ago
3 0

Answer: The answer is option D (5)

Step-by-step explanation: I just took the test

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Assume the general population gets an average of 7 hours of sleep per night. You randomly select 45 college students and survey
tekilochka [14]

Answer:

a) ii. This is a left-tailed test.

b) -1.59

c) -1.301

d) i. reject null hypothesis

e) Option i) The data supports the claim that college students get less sleep than the general population.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 7 hours

Sample mean, \bar{x} = 6.87 hours

Sample size, n = 45

Alpha, α = 0.10

Sample standard deviation, s =  0.55 hours

First, we design the null and the alternate hypothesis

H_{0}: \mu = 7\text{ hours}\\H_A: \mu < 7\text{ hours}

a) We use one-tailed(left) t test to perform this hypothesis.

b) Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{6.87 - 7}{\frac{0.55}{\sqrt{45}} } =-1.59

c) Now,

t_{critical} \text{ at 0.10 level of significance, 44 degree of freedom } = -1.301

Since,                    

t_{stat} < t_{critical}

d) We fail to accept the null hypothesis and reject it.

We accept the alternate hypothesis and conclude that  mean number of hours of sleep for all college students is less than 7 hours.

e) Option i) The data supports the claim that college students get less sleep than the general population.

8 0
3 years ago
How do i graph fractions? <br>please help
MissTica
Actually it's 
y = \frac{x+4}{3}

it's a line. so 2 points is enough

choose x so that x+4 would be divisible by 3 :)
1) x = 2, then y = (2+6) / 3 = 2 - sketch point (2,2)
2) x = 5, then y = (5+4) / 3 = 3 - sketch point (5,3)
3) line goes though those points. use ruler :) 
7 0
3 years ago
A house owner wishes to cover their roof with solar panels. Each solar panel is of the following size. The roof section is recta
Nataliya [291]

Answer:

Yes

Step-by-step explanation:

this was for holiday homework why did you ask here

5 0
3 years ago
Read 2 more answers
Pythagorean Theorem to solve for x. If the hypnoses is 10 m, and one leg is 6 m. Find the other leg x
lilavasa [31]

Answer:

The other leg X = 8m

Step-by-step explanation:

As per Pythagorean theorem-

Square of hypotenuse = sum of square of other two sides  of the triangle

Substituting the given values in above equation, we get -

10^2 = 6^2 + X^2\\100 - 36 = X^2\\X^2 = 64\\X = 8m

The other leg X = 8m

8 0
3 years ago
Find the surface area.<br> 17 ft<br> 8 ft.<br> 20 ft<br> 15 ft<br><br> Need this fast
Orlov [11]

Answer:

920 square feet

Step-by-step explanation:

Top: 20 * 17 = 340

Side triangles: 8 * 15 / 2 = 60

2 side triangles: 60 * 2 = 120

Back rectangle: 8 * 20 = 160

Bottom rectangle: 15 * 20 = 300

All of them: 340 + 120 + 160 + 300 = 920

4 0
2 years ago
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