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Karolina [17]
2 years ago
5

Please Help! ASAP!! Will give Brainliest and 20 points!

Mathematics
1 answer:
NARA [144]2 years ago
5 0
Answer: 30
reasoning: 30 x 4/5 = 24
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Small sample: During an economic downturn, companies were sampled and asked whether they were planning to increase their workfor
leva [86]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The confidence level interval is  0.016 \le C \le 0.404

Step-by-step explanation:

The sample size is  n =  20

The number planning to increase workforce is  x =  3

 The confidence level is  c  = 98%

The value of proportion for a plus 4 method is

      p = \frac{x+2}{n+4}

substituting values

      p = \frac{3+2}{20+4}

       p =0.21

The z-critical value at confidence level of 98% is

     z_{c}=z_{0.98} =  2.33

This values is obtained from the standard normal table

The confidence level interval can be mathematically represented as

      C =p \ \pm z_{c} * \sqrt{\frac{p(1-p)}{n+4} }

substituting values

      C = 0.21 \pm 2.33 * \sqrt{\frac{0.21(1- 0.21)}{20 +4} }

       C = 0.21 \pm 0.194

=>   0.016 \le C \le 0.404

7 0
3 years ago
Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 5.5 parts
PIT_PIT [208]

Answer:

Give

null hypothesis: H0 = 5.5

alternative hypothesis: Ha different 5.5

standard error = 1 / (31) 1/2= 0.1796

we deduce that:

t stat = (5.2-5.5) /0.1796 = -1.67033

p-value = 0.105

the null hypothesis cannot be rejected because the value of p is greater

4 0
4 years ago
What is the value of the correlation coefficient r of the data set?
pantera1 [17]

You might have already done this now, but the answer is

0.84

I just finished the Quiz :)

5 0
3 years ago
Look at attached picture
Arte-miy333 [17]

Answer: 1: 7 5/12 yards   2: 16.4 miles

Step-by-step explanation:

4 3/4+2 2/3 = 7 5/12

7.5+8.9= 16.4

6 0
4 years ago
The coach of the track and field team is putting together groups of runners to run relays. Each group will need to run a race th
andrew11 [14]

Answer:

16 runner

Step-by-step explanation:

It is given that,

Each group will need to run a race that is 1/2 of a mile long. Each runner has to run 1/8 of a mile in the race.

Let there are x no of runners. ATQ,

\dfrac{1}{8}x=\dfrac{1}{2}\\\\x=\dfrac{(1/2)}{(1/8)}\\\\x=16

So, there are 16 runner that are needed for each relay race group.

4 0
3 years ago
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