If Julie needs 3 1/4 cups of oatmeal , how many 1/4 cups of oatmeal will she use?

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine fo

Anni [7]

Answer:

The 90% confidence interval for the mean nicotine content of this brand of cigarette is between 20.3 milligrams and 30.3 milligrams.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 9 - 1 = 8

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 8 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 1.8595

The margin of error is:

M = T*s = 1.8595*2.7 = 5

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 25.3 - 5 = 20.3 milligrams

The upper end of the interval is the sample mean added to M. So it is 25.3 + 5 = 30.3 milligrams.

The 90% confidence interval for the mean nicotine content of this brand of cigarette is between 20.3 milligrams and 30.3 milligrams.

7 0

3 years ago

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NNADVOKAT [17]

<h3>☁️ Learn Math With Me-!</h3>

$\sf\frac{{96}^{84}}{{96}^{82}}=... \\$

$\sf = {96}^{84} \div {96}^{82}$

$\sf = {96}^{84 - 82}$

$\sf = {96}^{2}$

$\sf = 96 \times 96$

$\sf = 9.216$

Correct Me If I'm Wrong :)

6 0

3 years ago

Read 2 more answers

How would I use factoring to write equivalent expressions for the following expressions?

Sedbober [7]

Answer:

4(a + 6)

3(x - 4)

Step-by-step explanation:

Factoring is just rewriting an expression into the parts that multiply together to make the original...like if I had a 100 but decided instead to write 4×25 or if I had 25x I wrote 5(5x) .

If you look at your

4a + 24

You're looking for whatever is the same in both pieces (the 4a and also the 24) So there is a 4 in 4a and there is also a 4 "in" 24 (as in 4×6 is 24)

So if you pull out that 4 and throw it up front, whatever is left behind goes into a pair of parentheses.

4 (____ + ____)

4(a + 6)

This is your factored form bc if you multiply that 4 back in you'll get the original expression back again.

4a + 24

= 4(a + 6)

It's like factoring is "un-distributive" property.

Theres a 3 in 3x and also in 12

3x - 12

= 3(x - 4)

6 0

2 years ago

Solve for x? I don't think any angle is a 90 degree angle. I didn't draw it exactly right.

Ulleksa [173]

From cosine law
c^2 = a^2 + b^2 -2abcos(C)
cos(C) = (a^2 + b^2 - c^2)/2ab
this formula will solve your problem

4 0

3 years ago

Simplify the expression. n+3(n−1)

puteri [66]

Answer:

4n - 3

Step-by-step explanation:

$n+3(n-1)\\n+3n-3\\4n-3$

3 0

2 years ago

Read 2 more answers