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ira [324]
2 years ago
12

Help me please help please

Mathematics
2 answers:
almond37 [142]2 years ago
6 0
6 km and 10 km makes the most sense since those are the only times she stopped
Artemon [7]2 years ago
3 0
The answer is 6km and 10 km
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×-5y=-15<br> Complete the missing value in the solution to the equation<br> (-5,__)
Readme [11.4K]

Answer:

(-5  , 2 )

Step-by-step explanation:

hello :

×-5y=-15

5y = x+15

y = (1/5)x+3    for x= - 5    y = (1/5)(-5) +3  so :  y = 2

3 0
3 years ago
1. The national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15. The dean of a college wants to kno
Nat2105 [25]

Answer:

We conclude that the mean IQ of her students is different from the national average.

Step-by-step explanation:

We are given that the national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15.

The dean of a college want to test whether the mean IQ of her students is different from the national average. For this, she administers IQ tests to her 144 students and calculates a mean score of 113

Let, Null Hypothesis, H_0 : \mu = 100 {means that the mean IQ of her students is same as of national average}

Alternate Hypothesis, H_1 : \mu\neq 100  {means that the mean IQ of her students is different from the national average}

(a) The test statistics that will be used here is One sample z-test statistics;

               T.S. = \frac{Xbar-\mu}{\frac{s}{\sqrt{n} } } ~ N(0,1)

where, Xbar = sample mean score = 113

              s = population standard deviation = 15

             n = sample of students = 144

So, test statistics = \frac{113-100}{\frac{15}{\sqrt{144} } }

                             = 10.4

Now, at 0.05 significance level, the z table gives critical value of 1.96. Since our test statistics is more than the critical value of z which means our test statistics will fall in the rejection region and we have sufficient evidence to reject our null hypothesis.

Therefore, we conclude that the mean IQ of her students is different from the national average.

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3 years ago
Answer The Question On The Picture
taurus [48]

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a

Step-by-step explanation:

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200 to 170 what is the percentage discount offered
wel

Answer:

85%

Step-by-step explanation:

Convert fraction (ratio) 170 / 200 Answer: 85%

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Which angles are obtuse? Please help ASAP. Thank you. (Should be fairly easy to answer btw).
777dan777 [17]
The answer is c, hope it helps

6 0
3 years ago
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