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olasank [31]
3 years ago
11

How do I do 3? Thanks a bunch

Mathematics
1 answer:
Nataly_w [17]3 years ago
5 0
A does

Hope that helps!


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The shade of marble tile is measured by the amount of light reflected by the tile measured on a scale of 0-255. A perfectly blac
Dafna11 [192]

Answer:

Step-by-step explanation:

Sample data

204.999 206.149 202.102 207.048 203.496 206.343 203.496 206.676 205.831

N=9

Sum, Σx: 1846.14

Mean, μ: 205.12666666667

Variance, s^2:  2.6217475555555

Std dev = s = 1.619

The sample mean follows a t distribtion with df =8

Mean difference = 205.13-204.8 = 0.50

Std error = std dev/sqrt n = 0.540

Test statistic = Mean diff/se = 0.9259

p value = 0.1907 (one tailed at 95%)

Since p >0.05 we accept null hypothesis.

We cannot conclude that  the mean shade of Mezza Perla tile (µ) is greater than 204.8

7 0
3 years ago
A relative frequency table is made from data in a frequency table.
Dafna11 [192]

Answer:

k = 11  let me know if you don't understand how I got this.  

Step-by-step explanation:

I'm gonna write it out

 U V total

S  26 42 68

T   21 k 32

Total 47 53 100

So, you want to look at the column and row labeled total, this is the key.  for the row total, it sums up everything in the column above it.  so for the u column, the total value is 47 while the two values above it are 26  and 21.  These two values sum to 47.  This is the same for all other columns, and you can use the same reasoning with the total column as well summing rows.

This gives you two ways to solve for k.  either 21 + k = 32 or 42 + k = 53.  Either way gets you the answer k = 11

5 0
3 years ago
Read 2 more answers
A laboratory tested 85 chicken eggs and found that the mean amount of cholesterol was 190 milligrams. Assume that the sample sta
Serjik [45]

Answer:   (182.356,\ 197.644)

Step-by-step explanation:

Given : Significance level : \alpha:1-0.95=0.05

Sample size : n=85

Critical value : z_{\alpha/2}=1.96

Sample mean : \overline{x}=190

Standard deviation : \sigma=11.7

The confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=190\pm(1.96)\dfrac{11.7}{\sqrt{9}}\\\\=190\pm7.644\\\\=(190-7.644,\ 190+7.644)=(182.356,\ 197.644)

Thus, the 95% confidence interval for the true mean cholesterol content, μ, of all such eggs = (182.356,\ 197.644)

Hence, we conclude that the true population mean of amount of cholesterol lies between 182.356 and 197.644.

5 0
3 years ago
How do you do this whole page help please
Serggg [28]
The answer to number 1 is number cards 31 and 37. The answer to number 2 is number cards 61 and 54. On number 3, you could say, Mickeyy1 has these number cards. You then make 1 card over 30 and one card less than 22. Your final cards would be, 19, 23, 25, 27, and 32. You would get rid of the cards over 30 or less than 22. Therefore, you would keep number cards 23, 25, and 27. You would get rid of 19 and 32.
5 0
3 years ago
Jin makes trail mix with apricots and walnuts. A package of dried apricots weighs 22.1 ounces. Jin divides the apricots equally
zysi [14]

Answer:

0.65  ounces

Step-by-step explanation:

divide 22.1 by 34

4 0
3 years ago
Read 2 more answers
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