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mylen [45]
2 years ago
7

HELP HELP HALP HELP HELP

Mathematics
1 answer:
RUDIKE [14]2 years ago
6 0
C it’s what I chose for it
You might be interested in
Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll
Papessa [141]

Answer:

The 95% confidence interval for the average number of units that students in their college are enrolled in is between 11.7 and 12.5 units.

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 = 45 - 1 = 44

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 44 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2\frac{1.5}{\sqrt{45}} = 0.4

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 12.1 - 0.4 = 11.7 units

The upper end of the interval is the sample mean added to M. So it is 12.1 + 0.4 = 12.5 units

The 95% confidence interval for the average number of units that students in their college are enrolled in is between 11.7 and 12.5 units.

8 0
2 years ago
5 points
Georgia [21]

Answer:

You have to find 3.25% of 205, 000 and then multiply it by 10. Then, you must add that answer to the 205,000. That will be the correct answer.

6 0
3 years ago
Solve for x. Round your answer to 2 decimal places.<br> A. 8<br> B. 13.86<br> C. 18.48<br> D. 32
weqwewe [10]

Answer:

D) 32

Step-by-step explanation:

sin∠30=16/x first calculate sin∠30

1/2=16/x next cross multiply

x=32

Have a good day :)

3 0
2 years ago
Please help me 25 Points plz also Brainlliest just please help me.
cricket20 [7]

Answer:

101.7 ft I think

Step-by-step explanation:

5 1/3 times 2 is 10.7

4 3/4 time 2 is 9.5

10.7 times 9.5 is 101.65

The six becomes a 7 to make 101.7

3 0
2 years ago
Y’all i need help this is due today
NemiM [27]

Answer:

A

Step-by-step explanation:

20 x 2 = 40

30 x 2 = 60

7 0
2 years ago
Read 2 more answers
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