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1. The mean wage is Rs. 75 per day, SD wage is Rs 5 per day for a group of 1000 workers and the same is Rs 60 and Rs 4.5 for the other group of 1500 workers. Find mean and standard deviation for the entire group.
2. Mention the characteristics of Statistics. Explain any two applications of Statistics.
3. Distinguish between primary and secondary data. What are the methods of collecting primary data?
4. Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below:
Sales
(Rs. Lakhs)
50
55
60
65
Expenses (Rs. Lakhs)
11
13
14
16
15
If there is a +.20 correlation between SAT scores and high school GPA, SAT scores account for what % of the fluctuation in GPA?
Assume the probability that you will make a sale on any given telephone call is 0.11. Find the probability that you make your first sale on the fifth call, make your sale on the first, second, or third call, and do not make a sale the first three ..
jenco tracks their daily profits and has found that the distribution of profits is approximately normal with a mean of
A company has just manufactured 1694 CDs and 376 are defective. If 9 of these CDs are randomly selected for testing, what is the probablity that the entire batch will be accepted?
In order to estimate the proportion of families who prefer female baby-sitters to male baby-sitters with an error of at most 8 percentage points and with at least 95 percent confidence, how large a sample should be taken?
A contractor is considering a sale that promises a profit of $32,000 with a probability of 0.7 or a loss (due to bad weather, strikes, and such) of $9000 with a probability of 0.3. What is the expected profit?
Team Sports Inc. sells sporting goods to high schools and colleges via a nationally distributed catalogue. Management at Team Sports estimates it will sell 2000 Wilson Model A2000 catcher’s mitts next year.
Find the probability that an individual graduate will have a salary over $45,000. A group of nine graduates will have a group average over $45,000.
What is the 99% confidence interval for the true proportion of all e-mail subscribers that opened the e-mail within 24 hours of receiving it?
Let A be the event that a randomly chosen employee has a college degree and B the event that the chosen employee's income is more than $50,000.
Standard deviation of $1.2 million in 2009. Suppose a sample of 100 major league players was taken. What was the standard error for the sample mean salary?
Recently, students in a marketing research class were interested in the driving behavior of students. Specifically, the marketing students were interested if exceeding the speed limit was related to gender.
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