1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
REY [17]
3 years ago
12

The Wisconsin Dairy Association is interested in estimating the mean weekly consumption of milk for adults over the age of 18 in

that state. To do this, they have selected a random sample of 300 people from the designated population. The following results were recorded: Given this information, if the leaders wish to estimate the mean milk consumption with 90 percent confidence, what is the approximate margin of error in the estimate? Question 16 options: ±12.996 ounces ±0.75 ounce ±0.456 ounce z = 1.645

Mathematics
2 answers:
viktelen [127]3 years ago
5 0

Answer:

The approximate margin of error in the estimate is ±0.75 ounces.

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>The following results were recorded: xbar=34.5 ounces, s=7.9 ounces.</em>

The sample size is n=300.

We will use the sample standard deviation to estimate the population standard deviation, so we will use the t-statistic.

To develop a confidence interval, we first have to calculate the degrees of freedom, and then look up in a t-students distribution table the critical value for a 90% confidence interval.

The degrees of freedom are:

df=n-1=300-1=299

The critical value for a 90% CI is t=1.65.

Now, we can calculate the margin of error of the confidence interval as:

E=t\cdot s/\sqrt{n}=1.65*7.9/\sqrt{300}=13.035/17.32=0.75

The lower and upper bounds of the confidence interval will be:

LL=\bar x-t\cdot s/\sqrt{n}=34.5-0.75=33.75\\\\UL=\bar x+t\cdot s/\sqrt{n}=34.5+0.75=35.25

The confidence interval is (33.75, 35.25)

Stolb23 [73]3 years ago
4 0

Answer:

ME = 1.653 *\frac{7.9}{\sqrt{300}}= \pm 0.75

±0.75 ounce

Step-by-step explanation:

Assuming this complete question: The Wisconsin Dairy Association is interested in estimating the mean weekly consumption of milk for adults over the age of 18 in that state. To do this, they have selected a random sample of 300 people from the designated population. The following results were recorded: xbar=34.5 ounces, s=7.9 ounces Given this information, if the leaders wish to estimate the mean milk consumption with 90 percent confidence, what is the approximate margin of error in the estimate?

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=34.5 represent the sample mean

\mu population mean (variable of interest)

s=7.9 represent the sample standard deviation

n=300 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=300-1=299

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,199)".And we see that t_{\alpha/2}=1.653

And the margin of error is given by:

ME = 1.653 *\frac{7.9}{\sqrt{300}}= \pm 0.75

±0.75 ounce

You might be interested in
The shed is filled with sawdust whose density (kg/m3) at any point is proportional to the distance of that point from the floor.
postnew [5]
It is important to note that when we say proportional, the increase in the value of the independent variable (in this case, distance x) will also increase the value of the dependent variable (density, d). Using k as the proportionality constant, the answer to this question would then be,
                                        d = kx
3 0
3 years ago
How many 2/3 cup servings are there in 6 cups of fruit
scoray [572]

Answer:

9 cups

Step-by-step explanation:

6 ÷ 2/3

6/1 ÷ 2/3

6/1 x 3/2 = 18/2 = 9/1 = 9

3 0
3 years ago
What is the solution to the system of equations below?
Andre45 [30]

Answer:

Please check the explanation.

Step-by-step explanation:

Given the equations

y=-6x-10

y=-3x-21

solving the system of the equations

Arrange the equation variables for elimination

\begin{bmatrix}y+6x=-10\\ y+3x=-21\end{bmatrix}

y+3x=-21

-

\underline{y+6x=-10}

-3x=-11

\begin{bmatrix}y+6x=-10\\ -3x=-11\end{bmatrix}

solve

-3x=-11

Divide both sides by -3

\frac{-3x}{-3}=\frac{-11}{-3}

x=\frac{11}{3}

\mathrm{For\:}y+6x=-10\mathrm{\:plug\:in\:}x=\frac{11}{3}

y+6\cdot \frac{11}{3}=-10

y+6\cdot \frac{11}{3}=-10

y=-32

Therefore, the solutions to the system of the equations are:

y=-32,\:x=\frac{11}{3}

But, it seems none of the options is true.

8 0
3 years ago
Read 2 more answers
What is the answer to this question I need help please?!
babymother [125]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

Sets \:  \:  M \:  \:  and \:  \:  N \:  \:  only

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

7 0
3 years ago
A. 2x = 5<br><br> What would be the answer I don’t know anyone help me before the 28th
Aleksandr [31]

Answer:

2.5

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • How do you brake down 5/6-3/8 to lowest terms
    13·2 answers
  • You walk 2 miles in 1/2 hour. At that rate, how long will it take you to walk 3 miles?
    13·1 answer
  • Live fund are selling their holding at 5,000 per share how much would live fund receive if they sold half their holdings in mark
    12·1 answer
  • the old time train museum is raising the price of tickets for train rides. tickets used to cost $4.80 each. the new tickets pric
    6·2 answers
  • Roberta wants to create 17 ounces of new hand lotion, with a minimum 15% concentration of beeswax, from a mixture of two lotions
    11·1 answer
  • What is $15 with a 10% how much does he pay with the discount
    6·1 answer
  • What is the y intercept 8th math
    11·2 answers
  • What is the solution for the following system of equations?<br> 2x + y = 7<br> x - 2y = 6
    8·1 answer
  • A rectangular piece of metal is 30 in longer than it is wide. Squares with sides 6 in long are cut from the four corners and the
    10·1 answer
  • Consider the graph of the quadratic function. Which
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!