Step-by-step explanation:
step 1. well the age is from 7-12 so that eliminates A and D - right?
step 2. C has some points with age 6 which does not exist - right?
step 3. so that leaves the answer.
Area = 5 units × 3 units
Area = 15 square units
1111.111 in expanded form is 1000 + 100 + 10 + 1 + 0.1 + 0.01 + 0.001
Answer:
60%
Step-by-step explanation:
184 - 115 = 69
.6 × 100 = 60%
115 + 60% = 69
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.
