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iren [92.7K]
2 years ago
9

Plz help wit 1 3 4 i

Mathematics
1 answer:
kogti [31]2 years ago
6 0
A C F
i truly hope that answers your questions correctly
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Sally makes 7 out of every 10 shots she takes during practice. If this pattern were to continue, how many would she make during
Levart [38]

Answer:

21

Step-by-step explanation:

  • 7 for first 10 shots
  • 7 for another 10 shots
  • 7 for last 10 shots
4 0
3 years ago
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Please help!! giving brainlest , please be serious. due in a few minutes thanks!
Margaret [11]

The answer is -7

The arrows both point toward the left side, and sine there are seven spaces the arrows are going through, you subtract 7 spaces and get -7

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2 years ago
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A random sample of 5120 permanent dwellings on an entire reservation showed that 1627 were traditional hogans.
krek1111 [17]

Answer:

a) \hat p=\frac{1627}{5120}=0.3178

b)The 99% confidence interval would be given by (0.301;0.355)

Step-by-step explanation:

1) Notation and definitions

X=1627 number of permanent dwellings on the entire reservation that are traditional hogans.

n=5120 random sample taken

\hat p=\frac{1627}{5120}=0.318 estimated proportion of permanent dwellings on the entire reservation that are traditional hogans.

p true population proportion of permanent dwellings on the entire reservation that are traditional hogans.

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

Part a

The point of estimate for p=the proportion of all permanent dwellings on the entire reservation that are traditional hogans is given by:

\hat p=\frac{1627}{5120}=0.3178

Part b

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.318 - 2.58\sqrt{\frac{0.318(1-0.318)}{5120}}=0.301

0.318 + 2.58\sqrt{\frac{0.318(1-0.318)}{5120}}=0.335

The 99% confidence interval would be given by (0.301;0.355)

8 0
3 years ago
PLZ HELP 30points and brainlist
MariettaO [177]
The answer is b so good luck and i hope that helps
4 0
3 years ago
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Ling our 1500 in a savings account the simple interest rate is 1.5% how much simple interest will he earn after three years
natima [27]

Answer:

Step-by multiply 1500 × 0.015 × 36 to get that:

The interest is: $810.00

4 0
3 years ago
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