Mathematics, 22.01.2020 22:31 natlovesfood

Tim claims that a coin is coming up tails less than half of the time. in 110 tosses, the coin comes up tails 47 times. using p-value, test tim's claim. use a 0.10 significance level and determine conclusion.

Answers: 3

Show answers

Answers

Answer from: jay3676

$z=\frac{0.427 -0.5}{\sqrt{\frac{0.5(1-0.5)}{110}}}=-1.531$

p_v =P(z

If we compare the p value obtained and using the significance level given $\alpha=0.1$ we have that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 10% of significance the proportion of tails is significantly less than 0.5.

Step-by-step explanation:

1) Data given and notation

n=110 represent the random sample taken

X=47 represent the number of tails obtained

$\hat p=\frac{47}{110}=0.427$ estimated proportion of tails

p_o=0.5 is the value that we want to test

$\alpha=0.1$ represent the significance level

Confidence=90% or 0.90

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)

2) Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the proportion of tails is lower than 0.5:

Null hypothesis: $p\geq 0.5$

Alternative hypothesis: p < 0.5

When we conduct a proportion test we need to use the z statistic, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value p_o .

3) Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.427 -0.5}{\sqrt{\frac{0.5(1-0.5)}{110}}}=-1.531$

4) Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The significance level provided $\alpha=0.1$ . The next step would be calculate the p value for this test.

Since is a left tailed test the p value would be:

p_v =P(z

Answer from: Quest

i am currently in the exact same situation rn. algebra2/adv algebra is killing

step-by-step explanation:

Answer from: Quest

Just a second zzz

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:50, charlotte67

Which statements about these triangles is true

Answers: 2

continue

Mathematics, 21.06.2019 20:00, cutecupcake678

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Answers: 2

continue

Mathematics, 21.06.2019 20:30, ellie55991

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Answers: 3

continue

Mathematics, 21.06.2019 22:30, edgartorres5123

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

Answers: 1

continue

You know the right answer?

Tim claims that a coin is coming up tails less than half of the time. in 110 tosses, the coin comes...