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3 years ago

Can someone help me with this math? Please I'm desperate.

Mathematics

1 answer:

Ronch [10]3 years ago

5 0

Answer:

It is pi over nine, the one that your cursor is on. Forgive me if I am wrong

Step-by-step explanation:

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An SRS of ten brands of breakfast cereals is tested for the number of calories per serving. The following data result: 185, 190,

Pepsi [2]

Using the t-distribution, as we have the standard deviation for the sample, it is found that the 95% confidence interval estimate for the mean number of calories for servings of breakfast cereals is (195.3, 215.7).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm t\frac{s}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.
t is the critical value.
n is the sample size.
s is the standard deviation for the sample.

From the sample and the significance level of 0.05, we have that the parameters are given by:

$\overline{x} = 205.5, s = 14.2, n = 10, t = 2.2622$

Hence:

$\overline{x} - t\frac{s}{\sqrt{n}} = 205.5 - 2.2622\frac{14.2}{\sqrt{10}} = 195.3$

$\overline{x} + t\frac{s}{\sqrt{n}} = 205.5 + 2.2622\frac{14.2}{\sqrt{10}} = 215.7$

The 95% confidence interval estimate for the mean number of calories for servings of breakfast cereals is (195.3, 215.7).

More can be learned about the t-distribution at brainly.com/question/16162795

8 0

2 years ago

Kala has scored 21,22,20,20 and 17 point in her five basketball game so far. How many points does she need to score in her next

Oliga [24]

Step 1: Add up all the scores.
Step 2: count the number of scores.
step 3: divide the sum of the scores by the number of scores themselves.
step 4: The answer is 26 points.

8 0

3 years ago

Can somebody help me with this math question plz

OleMash [197]

Step-by-step explanation:

hope this helps, happy learning!!!

3 0

2 years ago

A box in a college bookstore contains books, and each book in the box is a history book, an english book or a science book. If 1

just olya [345]

B- 1/2 the books are science books. You have to add the two fractions and subtract that from one.

8 0

2 years ago

meg has $20 in a savings account that earns 10% annually. the interest is not compounded. how much will she have in 1 year

snow_tiger [21]

<h2>Answer: 22$</h2>

Step-by-step explanation: 10% of 20 is 2 so 20 + 2 = 22.

Hope this helps! ;)

4 0

2 years ago

Can someone help me with this math? Please I'm desperate. ​

Can someone help me with this math? Please I'm desperate.