Look at the photo, it has my question but ignore where it says '1. 5 Min' please

Artist 52 [7]

$\text{Hello there!}\\\\\text{Solve for y:} \\\\7y + 78 = y + 10\\\\\text{Subtract y from both sides}\\\\6y+78=10\\\\\text{Subtract 78 from both sides}\\6y=-68\\\\\text{Divide both sides by 6}\\\\\\boxed{y= -34/3}$

5 0

3 years ago

Suppose scores on exams in statistics are normally distributed with an unknown population mean and a population standard deviati

Anna71 [15]

Answer:

( 67.18, 68.82)

Step-by-step explanation:

Let $\mu$ be the true (population) mean of statistics exam scores. We have a large random sample of n = 36 scores with a sample mean (sample mean score) of $\bar{x} = 68$ . We know that the population standard deviation is $\sigma = 3$ . A pivotal quantity is $(\bar{x}-\mu)/(3/\sqrt{36}) = (\bar{x}-\mu)/(3/6) = (68-\mu)/(1/2)$ which is approximately normally distributed and $P(-z_{0.05}\leq(68-\mu)/(1/2)\leq z_{0.05}) = 0.90$ where $-z_{0.05} =-1.6449$ , and so, $P(-1.6449\leq(68-\mu)/(1/2)\leq 1.6449) = 0.90$ . Therefore the 90% confidence interval is (68-(1/2)(1.6449), 68+(1/2)(1.6449)), i.e., ( 67.18, 68.82)

8 0

3 years ago

6. If you drew all possible random samples of size 1,000 from the population of LSAT test takers and plotted the values of the m

grigory [225]

Answer:

Step-by-step explanation:

Given that you drew all possible random samples of size 1,000 from the population of LSAT test takers

Plotted the values of the mean from each sample

As per central limit theorem, we find that for sample sizes of minimum 30, the means of all such samples randomly drawn would follow a bell shaped curve with normal distribution irrespective of the original distribution of the population.

Hence here answer is yes, this would be a normal distribution as per central limit theorem.

6 0

3 years ago

Which of the following sets of numbers could not represent the three sides of a triangle?

timama [110]

Answer:

(c) {13,16,30}

Step-by-step explanation:

In order for the sides lengths to form a triangle, the sum of the shortest two must exceed the longest.

That will not be the case for ...

{13, 16, 30}

because 13 +16 = 29 < 30.

(13, 16, 30} could not form a triangle

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For more on the subject, see ...

brainly.com/question/26258903

8 0

2 years ago

Is (4, -2) a solution of the inequality? Why or why not?

Leona [35]

Answer:

No

Step-by-step explanation:

The point is not in the shaded section. Every single point on the shaded section is a solution.

8 0

3 years ago