ello17

26.03.2021 • 

Mathematics

In August of 2012 the national average price for a gallon of regular unleaded gasoline was $3.85. A sample of gas stations in the state of Illinois was taken and the sample had an average price of $3.98. It is of interest to use this sample to test if the average gas price in Illinois is higher than the national average. The standard error is 0.069. Use a significance level of 5% Stat. Null The formula for the randomized test statistic is z= Find SE the value of the randomized test statistic. Round to three decimal places.

Ответ:

Arealbot

01.10.2020

Mathematics

---

60 = 40% * x ;
60 = ( 40 / 100 ) * x ;
60 = 2x / 5 ;
2x = 300 ;
x = 300 / 2 ;
x = 150 is full marks.

---

0,0(0 оценок)