Someone please help, with a cherry on top?

450 people are randomly selected at grocery stores across the state and surveyed on the amount of money they are spending at the

____ [38]

Answer:

Step-by-step explanation:

Sample variance when large number of samples are drawn we have tend to become a normal distribution.

Variance of the sample is different since variance

Var(x) = E(x^2)-{E(x)}^2

is the formula used for finding the variance of any sample.

But sampling distribution of variance requires repeating this process with the different samples several times.

So option A is not right

B is also not correct, C is wrong

D.The sampling distribution of the mean requires multiple samples to be compared. However, in this situation you are looking for the variance, so finding the sample variance is the same as investigating the sampling distribution of the variance.

is correct

3 0

4 years ago

HELP QUICK PLS I HAVE NO IDEA HOW TO DO THIS

Talja [164]

The average is found by adding all the temperatures together, then dividing by the number of days.

Since the average for five days was 63, then the total of the temperatures need to equal 63 x 5 = 315.

The total for the first four days was : 56 + 60 + 79 + 70 = 265

The fifth day is 315 - 265 = 50 degrees.

6 0

4 years ago

Hello can you please help me posted picture of question

loris [4]

The sample space will be: {1, 2, 3, 4, 5, 6}

Event A is: {Rolling 1,2 or 3}

Complement of event A will contain all those outcomes in the sample space which are not a part of event A.

So, complement of event A will be: {Rolling a 4,5 or 6}

Thus option A gives the correct answer

3 0

3 years ago

Please help I forgot how to do it. 35 POINTS

nikdorinn [45]

The answer is 480 inches cube all you had to do was add all

5 0

3 years ago

Read 2 more answers

A manufacturer is studying the effects of cooking temperature, cooking time, and type of cooking oilfor making potato chips. Thr

Lera25 [3.4K]

Answer:

(a) The total number of combinations that can be applied for making potato chips is 36.

(b) The number of combinations that will be used for each type of oil is 12.

(c) Permutations are not an issue because order does not matter.

Step-by-step explanation:

The effects of cooking temperature, cooking time and cooking oil is studied for making potato chips.

The number of different temperatures applied is, n (T) = 3.

The number of different times taken is, n (t) = 4.

The number of different oils used is, n (O) = 3.

If an assignment can be done in n₁ ways and if for this assignment another assignment can be done in n₂ ways then these two assignments can be performed in (n₁ × n₂) ways.

(a)

Compute the total number of combinations that can be applied for making potato chips as follows:

Total number of combinations for making chips = n (T) × n (t) × n (O)

$=3\times4\times 3\\=36$

Thus, the total number of combinations that can be applied for making potato chips is 36.

(b)

To make potato chips 4 different temperatures are used and 3 different oils are used.

Each of the oil type is cooked in 4 different temperatures.

So the number of ways to select each oil type is,

n (T) × n (O) = $4\times3=12$

Thus, the number of combinations that will be used for each type of oil is 12.

(c)

Permutation is the arrangement of objects in a specified order.

Since in this case ordering of the the three effects, i.e. temperature. time and oil type is not important, permutations are not an issue.

8 0

3 years ago