Answer:
Step-by-step explanation:
We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean
For the null hypothesis,
µ ≥ 50000
For the alternative hypothesis,
µ < 50000
Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is
z = (x - µ)/(σ/√n)
Where
x = lifetime of the tyres
µ = mean lifetime
σ = standard deviation
n = number of samples
From the information given,
µ = 50000 miles
x = 45800 miles
σ = 8000
n = 29
z = (50000 - 45800)/(8000/√29) = - 2.83
Looking at the normal distribution table, the probability corresponding to the z score is 0.9977
Since alpha, 0.05 < than the p value, 0.9977, then we would accept the null hypothesis. Therefore, At a 5% level of significance, the data is not highly consistent with the claim.
There are two expressions
Price of video games: 4(25) = $100
Sale tax: 0.06(100) = $6
Total: $100 + $6 = $106
Let x be the amount of winter snow that accumulates in the spring soil. The equation that represents the situation from the given above is,
x / 12 = w
where w is the depth of water. Substituting the given values,
x / 12 = 6
The value of x from the equation is 72. Therefore, the amount of winter snow is 72 inches. The answer is letter C.
Answer:
yes because she adds 4:1.
Step-by-step explanation:
add 1 1/10 + 1 2/5
first get both fractions with the same bottom number: 2/5 = 4/10 ( multiply both numbers by 2)
so now you have 1 1/10 + 1 4/10 = 2 5/10
5/10 reduces to 1/2
so answer is 2 1/2 inches, and since the level is going down it would be negative 2 1/2 inches
