HELP ME PLEASE! MOTION CONCEPT MAP!

A marketing executive is investigating whether this year’s advertising campaign has resulted in greater mean sales compared with

djverab [1.8K]

We make use of a one-sample t-test for a population mean.

One-sample t-test for a population mean

Option B

<h3> Sample mean and Sample standard deviation</h3>

A Sample Standard Deviation is the root-mean square of the data minus the sample mean,

The sample mean is is the mean of the randomly selected sample

Therefore, For a data or sample where we have no information on population standard deviation and here only one sample group is compared, we make use of a one-sample t-test for a population mean

A one-sample t-test for a population mean

More on Probability

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You are interested in space travel and want to learn more facts about space travel. Which would be the best source of informatio

Tpy6a [65]

A book or a professor

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3 years ago

Read 2 more answers

A speed skater goes around a turn with a 31 m radius. The skater has a speed of 14 m/s and experiences a centripetal force of 46

dybincka [34]

Answer:

Mass of the skater, m = 72.75 kg

Explanation:

It is given that,

Radius of the circular path, r = 31 m

Speed of the skater, v = 14 m/s

Centripetal force, F = 460 N

We need to find the mass of the skater. It can be determined using the formula of centripetal force. It is given by :

$F=\dfrac{mv^2}{r}$

$m=\dfrac{Fr}{v^2}$

$m=\dfrac{460\ N\times 31\ m}{(14\ m/s)^2}$

m = 72.75 kg

So, the mass of the skater is 72.75 kg. Hence, this is the required solution.

4 0

4 years ago

If a 20 N block experiences a force of kinetic friction of 8.0 N

shutvik [7]

The coefficient of kinetic friction (μ) between the block and the table is 0.4.

<h3>What is kinetic friction?</h3>

This sis the frictional force between an object in motion with the surface in contact.

μN = ff

where;

N is normal reaction due to weight of the block
ff is frictional force

μ is coefficient of friction

μ = ff/N

μ = 8/20

μ = 0.4

Thus, the coefficient of kinetic friction (μ) between the block and the table is 0.4.

Learn more about coefficient of friction here: brainly.com/question/20241845

#SPJ1

6 0

2 years ago

A Hollywood stuntman is preparing for a dangerous car stunt. He must drive a car at high speed toward the edge of a cliff and br

Mnenie [13.5K]

Answer:

Maximum starting velocity that the car can possess if the stuntman is to be successful = 50 m/s

Explanation:

We have equation of motion , $s= ut+\frac{1}{2} at^2$ , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

In this case, displacement = 100 meter, acceleration = -8 $m/s^2$ , time = 10 seconds, we need to find initial velocity.

Substituting

$100= u*10-\frac{1}{2} *8*10^2\\ \\ u*10=100+400\\ \\ 10u=500\\ \\ u=50m/s$

So, Maximum starting velocity that the car can possess if the stuntman is to be successful = 50 m/s

5 0

3 years ago