Keisha’s experimental probability is 1/50.
When the inventory is 4000 clocks, the prediction is that 3920 clocks will work.
Keisha will have more than 97% of the products working.

Step-by-step explanation:

These are three prediction that Keisha can make based on the report that said 6 of 300 clocks tested weren't working.

Base on that information, Keisha can calculate an experimental probability, dividing clocks that don't work properly by the total amount of clocks:

$P_{clocks} = \frac{6}{300}=\frac{1}{50} = 0.02 (or 2\%)$

Therefore, the probability of success is 100% - 2% = 98%.

This means that Keisha has a probability of having 98% of all clocks functioning properly. So, she can make the prediction: from 4000 clocks, 3920 will work. Also, she can predict that she will actually have more than 97% working, because the experimental probability is higher than that.

4 0

3 years ago

Read 2 more answers

Max has 5 red cars 1/3 of the cars are red how many are left.

Pie

So 5 red cars
1/3 of all cars are red
therefor
5=1/3 of all cars
'of' means multply
5=1/3 times all cars
multiply both sides by 3
15=all cars

how many are left
basically how many are NOT red
15=all
red=5
all-red=others
15-5=others=10
10 cars are left

4 0

4 years ago

the sitting height (from the bottom of the seat to the top of the person's head) of female drivers is normally distributed with

Sindrei [870]

Answer:

B; 50%

Step-by-step explanation:

Here, we want to calculate the percentage of women that will not fit in the driver’s seat

We proceed as follows;

We start with calculating the z-score of this;

That would be ;

(x-mean)/SD

in this case;

x = 34 inches

mean = 34 inches

SD = 1.4 inches

Thus, we have that;

(34-34)/1.4 = 0/1.4 = 0

when z-score is 0, we are at the center of the distribution

A z-score of 0 corresponds to exactly 50%

6 0

3 years ago

Distance between (-1,-3) and (-9,2)

Lisa [10]

The formula of a distance between two points:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

We have the points (-1, -3) and (-9, 2). Substitute:

$d=\sqrt{(-9-(-1))^2+(2-(-3))^2}=\sqrt{(-8)^2+5^2}=\sqrt{64+25}=\sqrt{89}$

<h3>Answer: d = √89</h3>

3 0

4 years ago