All categories

3 years ago

Which statement is correct?

Mathematics

1 answer:

kondor19780726 [428]3 years ago

5 0

Answer:

Correct option is (a).

Step-by-step explanation:

The dependent t-test (also known as the paired t-test or matched-samples t-test) compares the two means associated groups to conclude if there is a statistically significant difference amid these two means.

We use the paired t-test if we have two measurements on the same item, person or thing. We should also use this test if we have two items that are being measured with a unique condition.

For instance, an experimenter tests the effect of a medicine on a group of patients before and after giving the doses.

Or in case of testing the level of reading comprehension of students before and after the speed-reading class we use t-test for dependent means.

The assumptions of paired t-test are:

The dependent variable that is tested should be continuous
The observations are independent

The dependent variable is normally distributed
There should not be any outliers.

Since the data consists of matched pair, both the samples must be of the same size.

Thus, the correct option is (a).

You might be interested in

Which of the following expression could be substituted for the height of the triangle in order to derive the formula Area=1/2ab

noname [10]

ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana ImAbananaImAbananaImAbanana ImAbanana

8 0

3 years ago

Please help me on questions 16 and 17 and please explain it thanks

Yuliya22 [10]

We can calculate the speed to be
.. (36 mi)(0.75 h) = 48 mi/h
or we can just assume that is what it is based on the fact that 48 is the only number in any of the offered answers.

distance = speed * time
.. y = 48 * x . . . . . . . . . . . . . . . . corresponds to selection A

_____
There is no question 17.

_____
15. All sections of the graph are linear. All sections except Q show the function increasing (left to right, which is how we talk about it). Thus selection B is the only sensible one.

6 0

4 years ago

The Tama, Japan, monorail carries 92,700 riders

Damm [24]

Answer:

The monorail runs 18 hours runs every day.

Step-by-step explanation:

You know that the total number of riders the monorail carry each day is 92700 and the number of riders the monorail carry per hour is 5150.

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

A direct proportionality relationship is established between two quantities if:

The greater the quantity in one quantity, the greater the quantity in the other quantity, in the same proportion.
The less quantity in the magnitude corresponds to the less quantity in the other magnitude, in the same proportion.

If the relationship between the magnitudes is direct the direct rule of three must be applied and to solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

Being

$x=\frac{c*b}{a}$

In this case the rule of three can be applied in the following way: if the monorail carries 5,150 passengers in 1 hour, the monorail will transport 92,700 passengers in how many hours?

$amount of hours=\frac{92,700 passengers*1hour}{5,150 passengers}$

amount of hours= 18 hours

So the monorail runs 18 hours runs every day.

8 0

4 years ago

The first rule is add 2 starting from 0. The second rule is add 6 starting from 2. What is the third ordered pair using the term

andrew11 [14]

My guess would be either 2,8 or 4,14

6 0

2 years ago

Read 2 more answers

Type the correct answer in each box. Spell all words correctly, and use numerals instead of words for numbers. If necessary, use

notka56 [123]

Answer:

Median and 37.50

Step-by-step explanation:

We are given a data set which gives the number of bottles filled by each of the workers in a bottling plant in one day.

The data is:

{36, 18, 16, 28, 68, 35, 37, 66, 38, 40, 41, 44, 72, 29}

Let us find mean, median and mode for this.

Mean = 40.571

Arrange in ascending order

16,18,28,29,35,36,37,38,40,41,44,66,68,72

Median = average of middle entries = 37.5

Mode = one with maximum frequency = Nil

On scrutiny of these three central tendencies we find that mode is not applicable here. Mean is not good as there is a large deviation i.e. range is very high 72-16 = 56 and also extreme items are present.

Hence median is the best measure here for comparison

The best measure of center for this data set is the median___ , and its value exspressed up to one decimal place is 37.50___

6 0

4 years ago

Read 2 more answers