A T-shirt costs 4 times as much as a pair of socks. A T shirt costs $16 Ifs the cost of a pair of socks

2 answers:

8 0

Let's say that, s is our variable .They say that t-shirts are four times the price of socks .That means that if we multiply the price of socks by 4 ,wil l get the price of the t shirts . We are given the price of the socks "s " and the cost of the t shirts = 16 so u subside the equation and get 16=4s

san4es73 [151]3 years ago

4 0

A pair of socks costs $4.00

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Answer:

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

$z=\frac{0.36 -0.41}{\sqrt{\frac{0.41(1-0.41)}{100}}}=-1.017$

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

$\hat p=0.36$ estimated proportion with the survey

$p_o=0.41$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion is lower than 0.41.:

Null hypothesis: $p\geq 0.41$

Alternative hypothesis: $p < 0.41$

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 $p_o$ .