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luda_lava [24]
3 years ago
8

A simple random sample is drawn from a normally distributed population, and when making a statistical inference about the popula

tion mean, the margin of error is found to be 5.9 at a 95% level of confidence. If the mean of the sample is 18.7, what is the 95% confidence interval for the population mean?
Mathematics
2 answers:
DiKsa [7]3 years ago
3 0
<span>To find the confidence interval, add and subtract the margin of error from the mean. With mean 18.7 and margin of error 5.9, you have 95% confidence the answer is between 12.8 and 24.6.</span>
V125BC [204]3 years ago
3 0

Answer:

B. 18.7 ± 9.7

Step-by-step explanation:

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The table shows the masses of four objects. A 2-column table with 4 rows. The first column labeled object has entries book, rock
Ede4ka [16]

Answer:

ROCK 2.3 kg

is about 22.5N

Step-by-step explanation:

To convert kg>>>>N

You multiply by 9.8 (this is good for estimating, but use more decimal places like, 9.80665 for more exact calculations).

You can divide N÷9.8 to find kg

see image

6 0
2 years ago
Please help cause I don’t know how to do this
zalisa [80]

Answer:

  4 GB

Step-by-step explanation:

Let "g" represent the number of gigabytes of data used. Then the phone bill is computed as ...

  bill = 65 + 12g

Aurora's bill is 113, so we can put that value into the equation and solve for g.

  113 = 65 + 12g

  48 = 12g . . . . . . subtract 65 from both sides of the equation

  4 = g . . . . . . . . . divide both sides of the equation by 12

Aurora used 4 gigabytes of data in September.

_____

You can also use your mathematical reasoning to solve this problem. The total bill consists of two charges: a fixed charge of 65 and a charge that depends on data. If you subtract the fixed charge from the bill, you find that the charge that depends on data is 113-65 = 48.

The data charge is 12 times the number of gigabytes. The data charge on the bill is 48, which is 12 times 4. Then the number of gigabytes is 4.

7 0
3 years ago
What is the probability of rolling a number less than or equal to 2 on a six sided die?
Kruka [31]
The dice only has 6 sides so if you need to roll a 2 or less that only leaves the number one. So it would be 2/6
7 0
3 years ago
Read 2 more answers
1. Most credit card incentive programs give----
MAXImum [283]
1. Most credit card incentive programs give
    b. cashback
2. To calculate a rewards program incentive, you---
    b. use the percentage number
3. For this we need to solve:
    The cashback is 2% and the purchase amount is $1685.90. We just multiply the percentage to the purchase amount to know what is the 2% of 1685.90.

Solution:
*remember to change the percent to its decimal form by moving the percent two places to the left. 2%=.02

1685.90*.02=33.718 or 33.72

Answer: a
3 0
3 years ago
A student finds the slope of the line between (8,7) and (1,4). She writes 17-4/1-8. What mistake did she make
Ksju [112]

Answer:

It's supposed to be 4-7/1-8

Step-by-step explanation:

The formula for slope is y1 - y2 / x1 - x2 (subscript). So you would take the y value from (8,7) which is 7, and subtract by the y value from (1,4), which is 4. You do the same for the x values and you get 7-4/8-1, which is 3/7.

3 0
3 years ago
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