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3 years ago

PLEASE HELP I NEED THE ANSWER IN LIKE TWO MINUTES IF YOU CAN HELP PLEASE HELPP

Mathematics

2 answers:

ella [17]3 years ago

8 0

Assumed the pens where equally priced

mylen [45]3 years ago

7 0

Answer:

I am pretty sure that the answer is He assumed the pens are equally priced

Step-by-step explanation:

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10. (a) Emily got a job at Big Bob's Storage. Her weekly salary is $700. What is her

NemiM [27]

Someone answer this.

6 0

3 years ago

The graph of △UVW has coordinates U(−4, 2) , V(−1, 1) , and W(−5, −4) .

dangina [55]

Answer:

U(-1,3)

V(2,2)

W(-2,-3)

Step-by-step explanation:

5 0

3 years ago

Б) Which label on the cone below represents the radius? ОООО

lions [1.4K]

The radius is found on the letter C!

I hope this helped! Mark me Brainliest! :) -Raven❤️

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4 years ago

for the data values below construct a 95 confidence interval if the sample mean is known to be 12898 and the standard deviation

Volgvan

Answer:

A 95% confidence interval for the population mean is [3315.13, 22480.87] .

Step-by-step explanation:

We are given that for quality control purposes, we collect a sample of 200 items and find 24 defective items.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

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

where, $\bar X$ = sample proportion of defective items = 12,898

s = sample standard deviation = 7,719

n = sample size = 5

$\mu$ = population mean

Here for constructing a 95% confidence interval we have used a One-sample t-test statistics as we don't know about population standard deviation.

So, 95% confidence interval for the population mean, $\mu$ is ;

P(-2.776 < $t_4$ < 2.776) = 0.95 {As the critical value of t at 4 degrees of

freedom are -2.776 & 2.776 with P = 2.5%}

P(-2.776 < $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ < 2.776) = 0.95

P( $-2.776 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X-\mu}$ < $2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

P( $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ < $\mu$ < $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

95% confidence interval for $\mu$ = [ $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ , $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ]

= [ $12,898-2.776 \times {\frac{7,719}{\sqrt{5} } }$ , $12,898+2.776 \times {\frac{7,719}{\sqrt{5} } }$ ]

= [3315.13, 22480.87]

Therefore, a 95% confidence interval for the population mean is [3315.13, 22480.87] .

5 0

3 years ago

Simplify the algebraic expression by combining the like (or similar) terms -3+5y+9

USPshnik [31]

Answer:

5y+6

Step-by-step explanation:

-3 and 9 are like terms which can be simplified to 6.

7 0

3 years ago

Read 2 more answers