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Veronika [31]
3 years ago
14

What is the value of the t score for a 99% confidence interval if we take a sample of size 22?

Mathematics
1 answer:
Elanso [62]3 years ago
5 0

Answer: 2.831

Step-by-step explanation:

As per given , we have

sample size : n= 22

Degree of freedom = n-1 = 22-1=21

Significance level for 99% confidence interval = \dfrac{1-0.99}{2}=0.005

Using student's t-value table, we have

t_{0.005,\ 21}=2.831

Hence, the  t score for a 99% confidence interval if we take a sample of size 22= 2.831

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What’s the answer to this?
sattari [20]

Answer:

14.42

Step-by-step explanation:

6 0
3 years ago
The hypotenuse of a right triangle is 10 ft long. the shorter leg is 2ft shorter than the longer leg. find the side lengths of t
Gwar [14]
Since we have two possible pieces of information and 2 items to solve for, we know this is a system of equations.
Our first piece of information is that our shorter leg (s) is 2 feet shorter than our longer leg (l). This can be written as s=l-2.
Our second piece of information is that using the Pythagorean theorem that our shorter leg squared plus our longer leg squared is equal to our hypotenuse squared. This can be represented by s^2+l^2=10^2. Now we can solve.
We have already isolated for s in our first equation, so we can substitute l-2 in.
(l-2)^2+l^2=10^2
l-2+l=10
2l-2=10
2l=12
l=6
Now we can substitute in for s in our simpler equation
s=6-2
s=4
We now know that using our knowledge of systems of equations, the side lengths of this right angle triangle are 6 and 4.
5 0
3 years ago
What is the probability that a student eye color would be blue if their grade in physics is A? A two way table is presented belo
Zarrin [17]
The <u>correct answer</u> is:

16/45.

Explanation:

We want the probability that a student's eye color is blue if they made an A in physics.  This means we look at the column for students with an A.

There are 32 students with blue eyes in the A column.

This is out of 32+58=90 students that made an A.

This makes the probability 32/90, which simplifies to 16/45.
8 0
3 years ago
translate this sentence into an inequality. A cheetah can reach a speed of 70 mph. however, this speed can be maintained for no
Gre4nikov [31]
<h2>Hello!</h2>

The answer is:

B. d\leq 1,640ft

<h2>Why?</h2>

From the statement we know that the cheetah can reach a speed of 70 mph, but it can be maintained for no more than 1,640 feet.

The expression "no more than" means that at least it can be reached but never exceeded, it involves that the distance can be less or equal than 1,640 feet but never more than that.

So, the correct option is:

B. d\leq 1,640ft

Have a nice day!

7 0
3 years ago
It’s part of my lil brothers hw
zvonat [6]
For Part A: the answer is 90 muffins total.
For Part B: the answer is 150 muffins total.

All you have to do is divide x (number of muffins the baker made) by 0.4 to get the total amount of muffins made.
7 0
3 years ago
Read 2 more answers
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