A chocolate factory produces mints that weigh 10 grams apiece. The standard deviation of the weight of a box of 10 mints is 3 grams. You buy a box of mints that weighs 95 grams. What is your confidence that the box you bought did not come from the factory?

90%
95%
10%
5%

The confidence that the box you bought did not come from the factory is 90 %.

Step-by-step explanation:

Since we have given that

Population Mean weight (\mu)= 10 grams a piece

Standard deviation of the weight of a box = 3 grams

Number of mints = 10

We need to buy a box of mints that weighs 95 grams.

Sample mean is given by

x = grams .

First we find out the standard error which is given by

= 0.94868

Since it is normal distribution, so, we will find z-score.

z = - 0.53

The area to the left of a z-score of -0.53 = 0.29805.

So, it may be 90% or 95 % confidence.

For 95% confidence level,

Similarly,

For 90% confidence level,

The value is much smaller than 0.05.  

So, we will get 90% confidence and the critical value = 1.645

Margin of error is given by

(Standard deviation) (critical\ value) = 0.94868 1.645

                                                              =1.56

So, confidence interval will be

                          (10-1.56,10+1.56)

                              =(8.44,11.56)

about 0.75 hours

step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.