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4 years ago

6

a spinner is broken into sections labeled 1 to 50 what is the probability on the next spin that you will spin a number greater t

han 8

1 answer:

klemol [59]4 years ago

7 0

Answer:

I want to say most likely (not 100% sure)

Step-by-step explanation:

From 8 to 50 is a great distance. it it most likely you will get a number greater than 8.

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One week a librarian kept track of whether returned books were returned on time or not, and whether they had fewer than 200 page

zhannawk [14.2K]

In total, there were 147 books returned that week that had more than 200 pages. If 116 of those were returned on time, then 31 were returned late. This is about 79 percent of the 147 total. So, there is about a 79% chance that a randomly selected book with 200 pages or more was returned on time, or about 79/100.

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3 years ago

The graph of a linear relationship has a slope of -5 and passes through the point (2,-12). Write the equation of the line in slo

kakasveta [241]

Answer:

To graph the line mark off the 2 points and draw a line through them.

Step-by-step explanation:

The slope = (-2-7) / (-3-0)

= -9/-3

= 3.

The value of b is found using the point-slope form of a line:

y - y1 = m(x - x1)

using m = 3, (x1, y1) = (0, 7):

y - 7 = 3(x - 0)

y = 3x + 7.

Step-by-step explanation:

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3 years ago

What am I doing wrong? I've tried every conceivable answer, I thought I was good at this type of math but this program keeps pro

iVinArrow [24]

Answer:

Step-by-step explanation:

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3 years ago

What’s a constant Proportionality

irina1246 [14]

In mathematics, two variables areproportional if there is always aconstant ratio between them. Theconstant is called the coefficient ofproportionality or proportionality constant. ... x and y are directlyproportional if the ratio yx is constant.

In other words, the constant of proportionality is also the slope, **m**, rate of change, etc.

7 0

3 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