X-4 in word form Please help!
2 answers:
You might be interested in
Answer:
The mass of a substance that passes per unit of time is called the mass flow rate, the unit of mass flow rate is kilogram per second in SI units.
Step-by-step explanation:
Consider the provided information.
We need to Define mass and volume flow rates and how they are related.
The mass of a substance that passes per unit of time is called the mass flow rate, the unit of mass flow rate is kilogram per second in SI units.
The volume of fluid which passes per unit time is called volume flow rate.
The relation between them is:
The Mass flow rate = Density × Volume flow rate
Or
Where ρ is the density.
Answer:
There is evidence to said that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than 0.18
Step-by-step explanation:
First, we need to define the null and alternative hypothesis as:
H0: p = 0.18
H1: p > 0.18
Where p is the proportion of shoppers that said that they prefer to buy generic instead of name-brand products.
Then, we can calculated the test statistic using the following equation:
Where p' is the proportion of the sample and n is the size of the sample.
Replacing p by 0.18, p' by 0.21 (315/1500 = 0.21) and n by 1500, we get:
So, using the standard normal table, the p-value is calculated as:
p-value = P(z>3.02) = 0.0013
Additionally, At a 5% significance level, the critical value is the z value that let 5% on the right tail, so it is calculated as:
P(Z>z) = 0.05
Critical Value = 1.64
Finally, taking into account that the 5% significance level is higher than the p-value and the critical value is higher than the test statistic, we reject the null hypothesis and there is evidence to said that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than 0.18