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
Arturiano [62]
3 years ago
14

Rewa Delta Union Rugby CEO has become concerned about the slow pace of the rugby games played in the current union rugby, fearin

g that it will lower the spectator attendance. The CEO meets with the union rugby managers and referees and discusses guidelines for speeding up and making the games more interesting and lively. Before the meeting, the mean duration of the 15sided rugby game time was 3 hours, 5 minutes, that is, 185 minutes. This includes all the breaks and injury times during the game. A random sample of 36 of the 15-sided rugby games after the meeting showed a mean of 179 minutes with a standard deviation of 12 minutes. Testing at the 1% significance level, can you conclude that the mean duration of 15-sided union rugby games has decreased after the meeting?
Mathematics
1 answer:
ozzi3 years ago
6 0

Answer:

We conclude that the mean duration of 15-sided union rugby games has decreased after the meeting.

Step-by-step explanation:

We are given that Before the meeting, the mean duration of the 15-sided rugby game time was 3 hours, 5 minutes, that is, 185 minutes.

A random sample of 36 of the 15-sided rugby games after the meeting showed a mean of 179 minutes with a standard deviation of 12 minutes.

Let \mu = <em><u>mean duration of 15-sided union rugby games after the meeting.</u></em>

So, Null Hypothesis, H_0 : \mu \geq 185 minutes      {means that the mean duration of 15-sided union rugby games has increased or remained same after the meeting}

Alternate Hypothesis, H_A : \mu < 185 minutes     {means that the mean duration of 15-sided union rugby games has decreased after the meeting}

The test statistics that would be used here <u>One-sample t test statistics</u> as we don't know about the population standard deviation;

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

where, \bar X = sample mean duration of 15-sided union rugby games = 179 min

            s = sample standard deviation = 12 minutes

            n = sample of 15-sided rugby games = 36

So, <u><em>the test statistics</em></u>  =  \frac{179-185}{\frac{12}{\sqrt{36} } }  ~ t_3_5

                                       =  -3

The value of t test statistics is -3.

<u>Now, at 1% significance level the t table gives critical value of -2.437 at 35 degree of freedom for left-tailed test.</u>

Since our test statistic is less than the critical value of t as -3 < -2.437, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that the mean duration of 15-sided union rugby games has decreased after the meeting.

You might be interested in
9. Whats is the equivalent fraction for 0.625
Tatiana [17]

Answer:

5/8

Step-by-step explanation:

You need to convert to a simplified fraction by placing the numbers to the right of the decimal over 1000. Then reduce the fraction.

6 0
3 years ago
Read 2 more answers
HELP ME PLEASE Find the slope of the line and write it as a rate of change.
Eduardwww [97]

Answer:

1

Step-by-step explanation:

6 0
2 years ago
6x-4=-22<br>what's is the value of x​
Helen [10]

Answer:

-3

Step-by-step explanation:

6x - 4 = -22 6x = -18 x = -3

4 0
3 years ago
Read 2 more answers
Why do some metals react with only steam?​
Gnoma [55]

Answer:

Metals which react with steam form the solid metal oxide and hydrogen gas.

In general, the more reactive the metal, the more rapid the reaction. Aluminium is unusual, because it is a reactive metal that does not react with water. Its surface forms a protective layer of aluminium oxide that keeps water away from the metal below.

The apparatus used to react a metal with steam and collect the gas produced is shown below.

7 0
3 years ago
Read 2 more answers
Please help asap!! will give brainlist :)
Naddik [55]

Yo sup??

Area of trapezium=1/2*(sum of opposite sides)*(height of trapezium)

=1/2*(12.5+17.5)*6

=1/2*30*6

=90 cm²

Therefore the correct answer is option A

Hope this helps.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which expression could be used to determine the cost of a $50 video game after a 20 percent discount?
    9·3 answers
  • Solve the nonhomogeneous differential equation y′′+6y′−16y=e5x. Find the most general solution to the associated homogeneous dif
    13·1 answer
  • What is vertical distance? is it addition or subtraction
    15·1 answer
  • write a simplified expression that expression that shows thesum of three consecutive numbers where n is the last number. substit
    7·2 answers
  • What fraction is equivalent to -5/9
    15·1 answer
  • What is the definition of a unit rate?
    15·1 answer
  • What is the term?
    14·2 answers
  • Find the missing side of the triangle
    8·1 answer
  • Please Help Me ASAP.
    8·1 answer
  • Marvin's Tree Service purchased several spruce tree saplings.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!