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zaharov [31]
3 years ago
8

I’m feeling really lazy today, can someone do this for me?

Mathematics
1 answer:
Nesterboy [21]3 years ago
7 0
I really hope it's correct.

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a runner whose initial speed is 1.5m/s increases her speed to 2.4m/s in order to win a race. if the runner takes 4.4s to complet
Sergeeva-Olga [200]
The runner's acceleration would be about .2m/s
4 0
3 years ago
How do you find a regression equation
elena55 [62]

Answer:

A regression coefficient is the same thing as the slope of the line of the regression equation.

Step-by-step explanation:

The equation for the regression coefficient that you'll find on the AP Statistics test is: B1 = b1 = Σ [ (xi – x)(yi – y) ] / Σ [ (xi – x)2].

3 0
3 years ago
Please help me with this question!
frez [133]
\text {Laura = }  12 \text { years } 3 \text { months }

\text {Lisa = }  11 \text { years } 7 \text { months }

\text {Deborah = }  11 \dfrac{1}{2}  \text { years } =  11 \text { years } 6 \text { months }

\text {Elizabeth = }  11 \dfrac{1}{3}  \text { years } =  11 \text { years } 4 \text { months }

-----------------------------------------------------
Find Total :
-----------------------------------------------------
\text {Total = } 12 \text { yr } 3 \text { mth } + 11 \text { yr } 7 \text { mth } + 11 \text { yr} 6 \text { mth} +11 \text { yr } 4 \text { mth}

\text {Total = } 45 \text { years } 20 \text { months }

-----------------------------------------------------
Find Average :
-----------------------------------------------------
\text {Average = } (45 \text { years } 20 \text { months }) \div 4

\text {Average = } 560 \text { months } \div 4

\text {Average = } 140 \text { months } \div 4

\text {Average = } 11 \text { years } 8 \text { months }

----------------------------------------------------------------------------------------------------------
\bf \text {Answer : Average = } 11 \text { years } 8 \text { months }
----------------------------------------------------------------------------------------------------------
6 0
4 years ago
What's the answer to -7(3m-4)+2
dexar [7]
-7(3m - 4) + 2

First, expand to get rid of parentheses. / Your problem should look like: -21m + 28 + 2
Second, add 28 + 2. / Your problem should look like: -21m + 30

Answer: -21m + 30

3 0
4 years ago
A psychologist wants to see if a certain company has fair hiring practices in an industry where 60% of the workers are men and 4
makvit [3.9K]

Answer:

A) H_{0}: p=0.5 (At least half of the workers are women,fair)

B) H_{a}: p<0.5 (Less than half of the workers are women,unfair)

C) critical value of the test statistic is 1.64 (one tailed)

D) Test statistic is ≈ 0.29

E) Since 0.29<1.64, we fail to reject the null hypothesis. There is no significant evidence that the company has unfair hiring practices at 0.05 significance level.

Step-by-step explanation:

Let p be the proportion of women workers in the company. Null and alternative hypotheses are

H_{0}: p=0.5 (At least half of the workers are women,fair)

H_{a}: p<0.5 (Less than half of the workers are women,unfair)

Test statistic can be found using the equation:

z=\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } } where

  • p(s) is the sample proportion of women workers (\frac{55}{107} =0.514)
  • p is the proportion assumed under null hypothesis. (0.5)
  • N is the sample size (55+52=107)

Then z=\frac{0.514-0.5}{\sqrt{\frac{0.5*0.5}{107} } } ≈ 0.29

For alpha 0.05, critical value of the test statistic is 1.64 (one tailed)

Since 0.29<1.64, we fail to reject the null hypothesis. There is no significant evidence that the company has unfair hiring practices at 0.05 significance level.

4 0
3 years ago
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