Find the slope of the line through the given points. (1, 3) and (0, -9)

The average of five numbers is 27. Four of the five numbers are 48, 8, 43, and 10. What is the other number?

jarptica [38.1K]

Look at the attached picture

Hope it will help you

Good luck on your assignment

4 0

3 years ago

Listed below are the lead concentrations in mu ??g/g measured in different traditional medicines. Use a 0.10 0.10 significance l

laiz [17]

Answer:

We conclude that the mean lead concentration for all such medicines is less than 17 mu.

Step-by-step explanation:

We are given below are the lead concentrations in mu;

6.5 18.5 21.5 5.5 8.5 4.5 4.5 17.5 15.5 20

We have to test the claim that the mean lead concentration for all such medicines is less than 17 mu.

Let $\mu$ = mean lead concentration for all such medicines.

So, Null Hypothesis, $H_0$ : $\mu$ = 17 mu {means that mean lead concentration for all such medicines is equal to 17 mu}

Alternate Hypothesis, $H_A$ : $\mu$ < 17 mu {means that the mean lead concentration for all such medicines is less than 17 mu}

The test statistics that would be used here One-sample t test statistics as we don't know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n}}}$ ~ $t_n_-_1$

where, $\bar X$ = sample mean lead concentration = $\frac{\sum X}{n}$ = 12.25 mu

s = sample standard deviation = $\sqrt{\frac{\sum (X-\bar X)^{2} }{n-1} }$ = 6.96 mu

n = sample size = 10

So, test statistics = $\frac{12.25 -17}{\frac{6.96}{\sqrt{10}}}$ ~ $t_9$

= -2.16

The value of t test statistics is -2.16.

Now, the P-value of the test statistics is given by the following formula;

P-value = P( $t_9$ < -2.16) = 0.031

Now, at 0.10 significance level the t table gives critical value of -1.383 for left-tailed test. Since our test statistics is less than the critical value of t as -2.16 < -1.383, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that the mean lead concentration for all such medicines is less than 17 mu.

7 0

4 years ago

14) You and your friend to out to eat and the cost of the meals

MaRussiya [10]

Answer:

The tip would be $3.90 and rounded to the nearest dollar would be $4.00

Step-by-step explanation:

4 0

4 years ago

The Jackson family went to eat at Applebees. Their bill came to $32.89. They gave the waiter a 15% tip. What was the total amoun

lyudmila [28]

$32.89

15% tip

Is $4.94

Making the total of the bill

$37.83

4 0

3 years ago

Write the difference of the expressions 17x−13y+8 and 20x+6y and simplify it.

Nostrana [21]

Answer:

50x

Step-by-step explanation:

The 17 is the loop product or 6. Do reverse division and add the 78 on step three. Good Luck!

5 0

3 years ago