Which statement correctly identifies the change that the ice cream is shown in the illustrated

Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll

Andrew [12]

Using the t-distribution, as we have the standard deviation for the sample, it is found that the 95% confidence interval for the number of units students in their college are enrolled in is (11.7, 12.7).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm t\frac{s}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

t is the critical value.

n is the sample size.

s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed <em>95% confidence interval</em>, with 49 - 1 = <em>48 df</em>, is t = 2.0106.

Hence:

$\overline{x} - t\frac{s}{\sqrt{n}} = 12.2 - 2.0106\frac{1.6}{\sqrt{49}} = 11.7$

$\overline{x} + t\frac{s}{\sqrt{n}} = 12.2 + 2.0106\frac{1.6}{\sqrt{49}} = 12.7$

The 95% confidence interval for the number of units students in their college are enrolled in is (11.7, 12.7).

More can be learned about the t-distribution at brainly.com/question/16162795

4 0

3 years ago

You a learning Facilitator for Natural Sciences at your School you have experienced a Steep decline in the performance for grade

Mariulka [41]

Answer:

The decline in the performance of students of grade 12 has been concerning. There should be workshop for their improvement in learning. The students can have a chance to attend the workshop which will help them enhance their skills of reinforcement and skill of explaining and probing. The students will be able to polish their skills during different sessions of the workshop. The skill of reinforcement will add confidence to the students that they have ability to prove themselves.

8 0

3 years ago

How long is a whole year

luda_lava [24]

365 days and 12 months

5 0

3 years ago

Read 2 more answers

Sectional violence has been taking place in iraq between two islamic factions, the shi'ites and _____. taliban jihad sunnis

klemol [59]

Answer:

Sunnis is the answer on OW.