Help, WIll give 20 points

Need answer please on this question

jekas [21]

Answer:

answers are a d and b

Step-by-step explanation:

8 0

3 years ago

In studies examining the effect of humor on interpersonal attractions, McGee and Shevlin (2009) found that an individual’s sense

son4ous [18]

Answer:

The calculated value t = 2.038< 2.145 at 0.05 level of significance

Null hypothesis is accepted

There is the average rate is less than μ ≤ 4

Step-by-step explanation:

Step(i):-

The Population of the mean 'μ' =4

sample size 'n' = 16

sample mean 'x⁻' = 4.53

given sample standard deviation 's' = 1.04

level of significance α = 0.05

Step(ii):-

Null hypothesis:H₀ : There is no significance difference between two means

Alternative hypothesis : H₁: There is significance difference between two means

Test statistic

$t = \frac{x^{-} - mean}{\frac{S}{\sqrt{n} } }$

$t = \frac{4.53-4}{\frac{1.04}{\sqrt{16} } }$

t = 2.038

Degrees of freedom ν = n-1 = 16-1 =15

t₀.₀₂₅ = 2.145

Conclusion:-

The calculated value t = 2.038< 2.145 at 0.05 level of significance

Null hypothesis is accepted

There is the average rate is less than μ ≤ 4

6 0

3 years ago

Hunter and his workout partner arelifting weights together, doing manysets of each exercise. On a certainexercise, Hunter is usi

Soloha48 [4]

9514 1404 393

Answer:

1 set completed
21 kg

Step-by-step explanation:

The difference in mass of the bars is 19-15 = 4 kg. The difference in mass of the added weight is 6-2 = 4 kg. The difference in total mass (bar +added) is reduced by the difference in added mass after each set. The number of sets required to reduce the difference to zero is ...

(4 kg)/(4 kg/set) = 1 set

After 1 set, Hunter will increase the mass to 19 kg + 2 kg = 21 kg.

After 1 set, his partner will increase the mass to 15 kg +6 kg = 21 kg.

Both will be lifting 21 kg for their 2nd set, after they have completed 1 set.

_____

Additional comment

You can write equations for the mass being lifted by Hunter (h) and his partner (p) after s sets:

h = 19 +2s

p = 15 +6s

The masses will be equal when ...

h = p

19 +2s = 15 +6s

19 = 15 +4s . . . . . . . subtract 2s

4 = 4s . . . . . . . . . . . subtract 15

Note that the number on the left side of the equation is 19-15, the difference of bar masses. The coefficient on the right side is 6-2, the difference in the added masses. To find the number of sets (s), we divide the equation by the coefficient of s:

4/4 = s = 1

In the above solution we skipped directly to this final division in order to find the number of sets until the lifted masses were equal.

5 0

3 years ago

Read 2 more answers

I am really bad at math and I have no idea what any of this means, please help

frutty [35]

I believe its b because the points increase on the graph, Good luck!

8 0

3 years ago

Randy worked 4 2/9 hours on Sunday. If he

777dan777 [17]

Answer:

6 1/9 hours

Step-by-step explanation:

10 3/9 - 4 2/9 = 6 1/9

4 0

3 years ago