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
abruzzese [7]
2 years ago
11

Free 100PTS ( comment your favorite subject )

Mathematics
2 answers:
lilavasa [31]2 years ago
7 0

Answer:

historyyyyyyyyyyyyyyyy

zavuch27 [327]2 years ago
4 0

Answer: does dance class count as a subject???

Step-by-step explanation: thx for the points lol

You might be interested in
Lightbulbs of a certain type are advertised as having an average lifetime of 750 hours. The price of these bulbs is very favorab
Katyanochek1 [597]

Answer:

(a) Customer will not purchase the light bulbs at significance level of 0.05

(b) Customer will purchase the light bulbs at significance level of 0.01 .

Step-by-step explanation:

We are given that Light bulbs of a certain type are advertised as having an average lifetime of 750 hours. A random sample of 50 bulbs was selected,  and the following information obtained:

Average lifetime = 738.44 hours and a standard deviation of lifetimes = 38.2 hours.

Let Null hypothesis, H_0 : \mu = 750 {means that the true average lifetime is same as what is advertised}

Alternate Hypothesis, H_1 : \mu < 750 {means that the true average lifetime is smaller than what is advertised}

Now, the test statistics is given by;

       T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

where, X bar = sample mean = 738.44 hours

               s  = sample standard deviation = 38.2 hours

               n = sample size = 50

So, test statistics = \frac{738.44-750}{\frac{38.2}{\sqrt{50} } } ~ t_4_9

                            = -2.14

(a) Now, at 5% significance level, t table gives critical value of -1.6768 at 49 degree of freedom. Since our test statistics is less than the critical value of t, so which means our test statistics will lie in the rejection region and we have sufficient evidence to reject null hypothesis.

Therefore, we conclude that the true average lifetime is smaller than what is advertised and so consumer will not purchase the light bulbs.

(b) Now, at 1% significance level, t table gives critical value of -2.405 at 49 degree of freedom. Since our test statistics is higher than the critical value of t, so which means our test statistics will not lie in the rejection region and we have insufficient evidence to reject null hypothesis.

Therefore, we conclude that the true average lifetime is same as what it has been advertised and so consumer will purchase the light bulbs.

6 0
3 years ago
PLEASE HELP ME WITH THIS PROBLEM! PLEASE
Vladimir [108]

Answer:

when I find out the two others ill edit this,sorry i'm kinda slow lol

Step-by-step explanation:

<u>Team     Wins    Losses</u>

Tigers     20        

Vikings    25        10

Cougars   30       12

Pirates      35

4 0
3 years ago
1-8: TRUE OR FALSE Use trig to find the missing measure.
arsen [322]

I believe that its true hby?.

8 0
3 years ago
A triangle with the coordinates (6,4), (2,-1), and (-3,5) is translated 4 Units left and rotate 180 degrees about the origin. Wh
ankoles [38]

Answer:

(-2,-4),(2,1), and (7,-5)

Step-by-step explanation:

The given triangle has coordinates (6,4), (2,-1), and (-3,5).

When we translate 4 units left, the we obtain:

(6,4)------>(6-4,4)=(2,4)

(2,-1)----->(2-4,-1)=(-2,-1)

(-3,5)----->(-3-4,5)=(-7,5)

When the resulting figure is rotated 180° about the origin, the coordinates of the final figure becomes

(2,4)------>(-2,-4)

(-2,-1)----->(2,1)

(-7,5)------->(7,-5)

NB: The mapping for 180° rotation is:

(x,y)----->(-x,-y)

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=5y%2B7%20%5Cleq%20-3%20or%203y%20-2%20%5Cgeq%2013" id="TexFormula1" title="5y+7 \leq -3 or 3y
liberstina [14]
5y + 7 < = -3
5y < = -3 - 7
5y < = -10
y < = -10/5
y < = -2

3y - 2 > = 13
3y > = 13 + 2
3y > = 15
y > = 15/3
y > = 5
7 0
3 years ago
Other questions:
  • The weight of an African elephant is 6 × 106 grams; the weight of a tiger is 3 × 105 grams. How many times heavier is the elepha
    14·1 answer
  • Peyton Manning threw for 1,126 yards in his first four games. At this rate, how many yards will he throw for in sixteen games?
    6·1 answer
  • Write the ordered pair that represents yz. Then find the magnitude of yz . y=14,-23 z=23,-14
    15·2 answers
  • I wrote it down better
    7·2 answers
  • What is the equation of the graphed line written in standard form?​
    13·1 answer
  • Drag the tiles to the correct boxes to complete the pairs. Find the distance between each pair of points. 5 units 4 units 2 unit
    14·1 answer
  • Which equation represents the equation of the parabola with focus (-3 3) and directrix y=7?
    14·1 answer
  • Pls tell me how to do it
    11·1 answer
  • The scale model of a wardrobe is 1
    5·1 answer
  • Khan help, please! Hanger stuff
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!