Question

A Rollercoaster’s auditors estimate that the average daily loss from those illegally riding without tickets is at least (greater or equal) $250, but wants to determine the accuracy of this statistic. The company researcher takes a random sample of losses over 81 days and finds that = $248 and s = $15. a) Test at α = 0.02. b) Construct a 90% confidence interval of losses Note: a and b are independent.

**Steps to be covered:**

**state the hypothesis and identify the claim****find the critical value from the table and mention the acceptance range for H0****compute the test value****make the decision to reject or not the null hypothesis**

Answer #1

Steps to be covered:
state the hypothesis and identify the
claim
find the critical value from the table and mention the
acceptance range for H0
compute the test value
make the decision to reject or not the null
hypothesis
Mall security estimates that the average daily per-store theft
is no more than $250, but wants to determine the accuracy of this
statistic. The company researcher takes a sample of 64 clerks and
finds that =$252 and s = $10.
a)...

1.Mall security estimates that the average daily per-store theft
is no more than $250, but wants to determine the accuracy of this
statistic. The company researcher takes a sample of 64 clerks and
finds that =$252 and s = $10. a) Test at α = .05 b) Construct a 90%
CIE of μ 2.A college wants to know the lower limit of a two-sided
80% confidence interval for SAT scores on the Math section (range
equals 200 to 800). They...

A medical investigation claims that the average number of
contaminations per week at the Main Hospital is 19.2. A random
sample of 10 weeks had a mean number of 20.5. The sample standard
deviation is 3.5.
Is there enough evidence to reject the investigator’s claim at
alpha =.05?
Steps to be covered:
state the hypothesis and identify the
claim
find the critical value from the table and mention the
acceptance range
compute the test value (t test)
make the decision...

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