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A local business school claims that its graduating seniors get higher-paying jobs than the national average for business school graduates. Last year's figures for salaries paid to all business school graduates on their first job showed a mean of $10.20 per hour. A random sample of 10 graduates from last year's class of the local business school showed the following hourly salaries for their first job: $9.40, $10.30, $11.20, $10.80, $10.40, $9.70, $9.80, $10.60, $10.70, $10.90. You are skeptical of the business school claim and decide to evaluate the salary of the business school graduates, using ?= 0.05 (2-tail) what do you conclude?
Record the tumor grade and whether the patient was still alive one year after surgery. University Hospital County Hospital Private Hospital Which hospital has the best record?
Let ρk = λk/μk and ρ = ρ1+ρ2+·· ·+ρK . In particular, show, as before, that the probability of n customers in the system is Qn = p(0, ... , 0)ρn/n! for 0 ≤ n ≤ m.
Perform the following activities using a program such as MS Excel. Keep all calculations within one file. You may use separate worksheets within the same file, though.
question the data set represents the income levels of the members of a country club. estimate the probability that a
Suppose standard deviation stays same, how much do you have to decrease your average production time so that 95% of time you can deliver product in under 75 hours?
The following data represent systolic blood pressure readings on 10 randomly selected females between ages 40 and 82.
What type of association would be suggested by large values of (c, e, g)?- What type of association would be suggested by large values of (a, e, i)?
Stratum 2 contains 500 invoices, stratum 1,000 invoices, and stratum 4 contains 3,450 invoices. A sample of 500 sales invoices is needed. What type of sampling should you do? Why?
the use of a tremendously large sample does not solve the question of quality for an estimator. what problems do you
Calculate the safety stock for PVBs for each quarter. (σQ1 = 1877, σQ2 = 3361, σQ3 = 3851, σQ1 = 1877 and σQ4 = 8154). Assume the formula SS = z σtL1/2. Create a APP that minimises costs.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Define "Type I error" in your own words. When should we use the t distribution? How do we find the degrees of freedom when using the t-distribution to estimate or test the mean of a sample from a single population..
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