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kati45 [8]
3 years ago
12

A researcher reports that there is a significant difference between two treatments at the .05 level of significance. This means

that the average score for one treatment is at least 5% higher than the average score for the other treatment.
True

False
Mathematics
1 answer:
sineoko [7]3 years ago
4 0

Answer:

False

Step-by-step explanation:

Given that a researcher reports that there is a significant difference between two treatments at the .05 level of significance.

This implies we can be 95% confident that for samples of large size randomly drawn from the two treatments the difference would be statistically significant.

Because the test statistic we arrived for difference assuming H0 to be true has a p value less than 5% we conclude there is a significant difference between the averages of the two treatments.

Hence this does not mean that the average score for one treatment is at least 5% higher than the average score for the other treatment.

the given statement is false.

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A video game customers to rent games for $4.75 each. Customers can also buy a membership for $54 annually, and video games would
Firdavs [7]

Given:

A video game customers to rent games for $4.75 each.

Customers can also buy a membership for $54 annually, and video games would only cost $2.50 each.

To find:

The number of video games a customer would have to rent in a year in order for the two options to be equal.

Solution:

Let x be the number of video games.

A video game customers to rent games for $4.75 each. So, the total cost is

C_1(x)=4.75x

Customers can also buy a membership for $54 annually, and video games would only cost $2.50 each. So, the total cost is

C_2(x)=54+2.50x

Now, C_1(x)=C_2(x), if the rent in a year for the two options to be equal.

4.75x=54+2.50x

4.75x-2.50x=54

2.25x=54

Divide both sides by 2.25.

x=\dfrac{54}{2.25}

x=24

Therefore, the rent in two options are equal for 24 video games.

5 0
2 years ago
Find P (Freshman(Girl) Hint: P(A and B)
STatiana [176]

Answer:

\sf \dfrac29

Step-by-step explanation:

From the table:

  • Total number of Girls = 18
  • Total number of students = 30
  • Total number of Girls who are Freshman = 4

\sf Probability \ of \ an \ event \ occurring = \dfrac{Number \ of \ ways \ it \ can \ occur}{Total \ number \ of \ possible \ outcomes}

\sf \implies P(Girl)=\dfrac{18}{30}

\sf \implies P(Freshman \cap Girl)=\dfrac{4}{30}

\begin{aligned}\sf P(Freshman|Girl)& = \sf\dfrac{P(Freshman \cap Girl)}{P(Girl)}\\\\ & = \sf \dfrac{4}{30} \div \dfrac{18}{30}\\\\ & \sf=\dfrac{4}{30} \times \dfrac{30}{18}\\\\ & = \sf \dfrac29\end{aligned}

6 0
2 years ago
Use the image above to solve all 4 parts of the question.
drek231 [11]

Step-by-step explanation:

A)

Janet's took 34.56 seconds to cover 50m freestyle swim.

In words it could be said as: thirty four and fifty six hundredths.

B)  

Race #       Time (in sec.)                time( after roundoff to nearest integer)

  <em> 1                34.56                                       35</em>

<em>    2                 35                                           35</em>

<em>     3                34.8                                         35</em>

    4                 34.137                                      34

     5                33.92                                       34

Hence, the first 3 race times were equal after rounding off to nearest integer.

C)

on arranging the time of Janet's from fastest to slowest we get the table as:

Race #                              Time( in sec.)

 5                                        33.92

  4                                        34.137

   1                                        34.56

   3                                        34.8

   2                                          35

since, after decimal we arrange the numbers in order same as we do for the natural numbers.

as in race #5 '33' is the smallest among all hence we keep it in first place.

for race 4,1 and 3 we have the same digit before decimals so now we have to look for the number after decimals.

D)

Janet's time in race #4 was: 34.137 sec.

But Grace was 1.8 seconds faster than Janet.

Hence, Grace time=34.137-1.8=32.337 sec.

6 0
3 years ago
Can someone do these for me I’ll mark brainliest
Bas_tet [7]
A) 4x2-3=-3 (not really sure about this)
b) 20÷5-9=-5
c) -12÷3-(-6)=2
d) 10-3x(-2)=-14
6 0
3 years ago
Read 2 more answers
Two angles of a quadrilateral measure 40° and 180°. The other two angles are in a ratio of 13:15. What are the measures of those
Mama L [17]

Step-by-step explanation:

<em>Two </em><em>angles </em><em>are </em><em>given </em>

<em>1st </em><em>angle </em><em>=</em><em> </em><em>4</em><em>0</em><em>°</em><em> </em><em> </em><em>2nd </em><em>angle </em><em>=</em><em> </em><em>1</em><em>8</em><em>0</em><em>°</em>

<em>And </em><em>let </em><em>other </em><em>two </em><em>angels </em><em>be </em><em>1</em><em>3</em><em> </em><em>x </em><em>and </em><em>15x</em>

<em>4</em><em>0</em><em>°</em><em> </em><em>+</em><em> </em><em>18</em><em>0</em><em>°</em><em> </em><em>+</em><em> </em><em>13x </em><em>+</em><em> </em><em>15x </em><em>=</em><em> </em><em>3</em><em>6</em><em>0</em><em>°</em><em> </em><em><</em><em>Being </em><em>sum </em><em>of </em><em>angles </em><em>of </em><em>quadrilateral </em><em>></em>

<em>2</em><em>2</em><em>0</em><em>°</em><em> </em><em>+</em><em> </em><em>28x</em><em> </em><em>=</em><em> </em><em>3</em><em>6</em><em>0</em><em>°</em>

<em>28x </em><em>=</em><em> </em><em>3</em><em>6</em><em>0</em><em>°</em><em> </em><em>-</em><em> </em><em>2</em><em>2</em><em>0</em><em>°</em>

<em>28x </em><em>=</em><em> </em><em>1</em><em>4</em><em>0</em><em>°</em>

<em>x </em><em>=</em><em> </em><em>1</em><em>4</em><em>0</em><em>°</em><em> </em><em>/</em><em> </em><em>28</em>

<em>Therefore </em><em>x </em><em>=</em><em> </em><em>5</em><em>°</em>

<em>Measures </em><em>of </em><em>two</em><em> </em><em>angles </em>

<em>13x </em><em>=</em><em> </em><em>1</em><em>3</em><em> </em><em>*</em><em> </em><em>5</em><em>°</em><em> </em><em>=</em><em> </em><em>6</em><em>5</em><em>°</em>

<em>15x </em><em>=</em><em> </em><em>1</em><em>5</em><em> </em><em>*</em><em> </em><em>5</em><em>°</em><em> </em><em>=</em><em> </em><em>7</em><em>5</em><em>°</em>

5 0
3 years ago
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