It is claimed that the national average for the price of gasoline in $2.66 per gallon. a sample of 25 gas stations in hays yielded a sample mean of $2.89, and it is known that national standard deviation is σ=0.48. compute the test statistic for this test

2.396

Step-by-step explanation:

Given : It is claimed that the national average for the price of gasoline in $2.66 per gallon.

i.e. Population mean :

Sample size :

Sample mean :

Standard deviation :

We assume that the national average for the price of gasoline is normally distributed.

Since the sample size is small (< 30), then we need to calculate t-test statistic for the test .

Hence, the test statistic for this test = 2.396

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

it is true

step-by-step explanation:

all the combinations add up i used   calculator