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yanalaym [24]
3 years ago
6

(08.03) The dot plot below shows the number of items in the basket of some shoppers: Which of the following statements best desc

ribes the shape of the data? (2 points) Group of answer choices It is symmetric and has a peak at 3. It is symmetric and has a peak at 4. It is not symmetric and has a peak at 3. It is not symmetric and has a peak at 4.
Mathematics
1 answer:
VladimirAG [237]3 years ago
5 0

Answer:Number 3

Step-by-step explanation:

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A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes. Kar
ch4aika [34]

Answer:

We conclude that the mean waiting time is less than 10 minutes.

Step-by-step explanation:

We are given that a public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes.

Karen took bus number 14 during peak hours on 18 different occasions. Her mean waiting time was 7.8 minutes with a standard deviation of 2.5 minutes.

Let \mu = <u><em>mean waiting time for bus number 14.</em></u>

So, Null Hypothesis, H_0 : \mu \geq 10 minutes      {means that the mean waiting time is more than or equal to 10 minutes}

Alternate Hypothesis, H_A : \mu < 10 minutes    {means that the mean waiting time is less than 10 minutes}

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 waiting time = 7.8 minutes

             s = sample standard deviation = 2.5 minutes

             n = sample of different occasions = 18

So, <u><em>test statistics</em></u> =  \frac{7.8-10}{\frac{2.5}{\sqrt{18} } }  ~ t_1_7

                              =  -3.734

The value of t test statistics is -3.734.

Now, at 0.01 significance level the t table gives critical value of -2.567 for left-tailed test.

Since our test statistic is less than the critical value of t as -3.734 < -2.567, 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 waiting time is less than 10 minutes.

5 0
3 years ago
Math slope intercept form​
Rus_ich [418]

Answer id provided in the image attached.

5 0
3 years ago
Read 2 more answers
Wut is 36 x 6 :3 i am very stoopid
UkoKoshka [18]

216

Step-by-step explanation:

36*6=216

use a calculation

8 0
3 years ago
A sector with an area of 11/2 pie cm has radius of 3 cm what is the central angle measure of a sector in degrees
Nikolay [14]
A= 1/360 m•pi r^2

11/2= 1/360 m• pi (3)^2

11/2= 1/360 m• pi • 9
Divide 360 by 9

11/2= 1/40 m pi

Cross multiply

440=2pi m

Divide both sides by 2pi

m= 70.02817 degrees round if necessary
6 0
3 years ago
Consider the expression 6x6^0x6^-3
Montano1993 [528]

Answer:

6*(6^-3)=0.027777 recurring

Step-by-step explanation:

6^0=1

6^-3=0.004629629 recuuring

0.004629629 recurring *6=0.0.02777recurring

6 0
2 years ago
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