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2 years ago

Point S is on line segment \overline{RT}

Mathematics

2 answers:

Korolek [52]2 years ago

7 0

Ummm let me see so what u have to do is

enot [183]2 years ago

3 0

Answer:

ST=8

Step-by-step explanation:

Hope this helps anyone

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A statistics instructor who teaches a lecture section of 160 students wants to determine whether students have more difficulty w

Leona [35]

Answer:

There is no evidence that there is no significant difference between the sample means

Step-by-step explanation:

given that a statistics instructor who teaches a lecture section of 160 students wants to determine whether students have more difficulty with one-tailed hypothesis tests or with two-tailed hypothesis tests. On the next exam, 80 of the students, chosen at random, get a version of the exam with a 10-point question that requires a one-tailed test. The other 80 students get a question that is identical except that it requires a two-tailed test. The one-tailed students average 7.81 points, and their standard deviation is 1.06 points

The two-tailed students average 7.64 points, and their standard deviation is 1.33 points.

Group One tailed X Two tailed Y

Mean 7.8100 7.6400

SD 1.0600 1.3300

SEM 0.1185 0.1487

N 80 80

$H_0:\bar x=\bar y\\H_a: \bar x \neq \bar y$

(Two tailed test)

The mean of One tailed X minus Two tailed Y equals 0.1700

t = 0.8940

df = 158

p value =0.3727

p is greater than alpha 0.05

There is no evidence that there is no significant difference between the sample means

3 0

2 years ago

12. If a manufacturer conducted a survey among randomly selected target market households and wanted to be 95% confident that th

atroni [7]

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

Step-by-step explanation:

We have the following info given:

$Confidence= 0.95$ the confidence level desired

$ME =0.03$ represent the margin of error desired

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

The confidence level is 95% or 0.95, the significance is $\alpha=0.05$ and the critical value for this case using the normal standard distribution would be $z_{\alpha/2}=1.96$

Since we don't have prior information we can use $\hat p= 0.5$ as an unbiased estimator

Also we know that $ME =\pm 0.03$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

And replacing into equation (b) the values from part a we got:

$n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

6 0

2 years ago

The diagonal of a rectangular driveway is almost 12 feet. Which pair of dimensions is closest to the length and width of the dri

Archy [21]

Answer:

thanks for free points

6 0

1 year ago

Read 2 more answers

Which values represent the independent variable?

Sergeu [11.5K]

Answer:

Step-by-step explanation:

Traditionally, the y-value is the independent variable, while the x-value is the dependent variable.

5 0

2 years ago

Kate made a box to hold her jewelry collection. She used 42 inches of wood to build the sides of the box. If the box was 9 Inche

antoniya [11.8K]

We can use the 9 inches wide to determine that 18 inches of the 42 inches are the wide sides. 42 - 18 = 24, so we divide 24 by how many long sides there are, 2. 24 ÷ 2 = 12. The box was 12 inches long.

3 0

2 years ago