CFA-Level-I 試験問題を無料オンラインアクセス

A consumer group wants to prove that the average hospital costs are more than $931 per day. The group randomly samples 60 accounts and finds a sample mean of $950. The hypothesis test at an a-level of 5% and assumes a o of $50. With a test value of 2.94 standard deviations and a critical value of 1.645, the decision should be _______.

• A.accept H : u > 931 pa
  a
• B.reject H : u = 931
  0
• C.fail to reject H : u = 931
  0

Calculate a 90% confidence interval for a population mean. You have a sample of 21, a sample mean of -25%, and a sample standard deviation of 10%. The sample appears to be approximately normally distributed.

• A.[-28.9%, -21.1%].
• B.[-27.9%, -22.1%].
• C.[-28.1%, -21.9%].

You have a nest egg of $750. In order for your money to grow to $1,343.10, it must be invested at 6% for how many years?

• A.11
• B.10
• C.9

If a company depreciates equipment by using MACRS for income tax purposes but uses the straight-line method for financial accounting purposes, the tax consequences resulting from the difference will affect:

• A.a deferred tax liability
• B.a valuation allowance to be deducted from equipment
• C.a deferred tax assets

A manufacturer of light bulbs claims that the distribution of the light bulb life span has a mean of 60 hours and a standard deviation of 4 hours. The competition decides to check this claim by purchasing 30 light bulbs and testing them to determine the life span of the light bulbs. If the manufacturer's claim is true, how will the sampling distribution of the 30 light bulbs compare to the reported population distribution?

• A.The sampling distribution will be approximately normal with a mean of 60 hours.
• B.The sampling distribution will have a standard deviation of 4 hours.
• C.The sampling distribution will be approximately the same as the population distribution, skewed if the population is skewed, normal if the population is normal.