Reference no: EM13953450
Problem 1.
Use the following data set. The data set represents incomes (in thousands of dollars) of 20 employees at an engineering firm.
50, 48, 46, 59, 44, 43, 35, 59, 48, 53, 46, 59, 52, 48, 51, 59, 53, 51, 53, 52
(a) Find the range, mean, median, and mode of the data set.
(b) Make a frequency distribution for the data set using 5 classes. Include class midpoints, frequencies, and relative frequencies.
(c) Make a relative frequency histogram using the frequency distribution in (b).
(d) Determine which class has the greatest relative frequency and which has the least.
Problem 2.
The table shows the results of a survey in which 622 men and 644 women ages 25 to 46 were asked if they like Coke or Pepsi.
Men Women Total
Likes Pepsi 325 284 609
Likes Coke 297 360 657
Total 622 644 1266
(a) Find the probability that a randomly selected person likes Pepsi.
(b) Given that a randomly selected person is male, find the probability that the person likes coke.
(c) Given that a randomly selected person likes Pepsi, find the probability that the worker is a female.
(d) Are the events "likes Coke" and "being male" independent or dependent? Explain.
Problem 4.
Scores for a statistics exam are normally distributed, with a mean of 80 and a standard deviation of 10. Students scoring in the top 6% of the class are offered the opportunity to take an advanced statistics class. What is the lowest score you can earn and still be eligible to take the advance class?
Problem 5.
You randomly select 20 supermarkets and measure the temperature of their coolers. The
sample mean temperature is 43:0 F with a sample standard deviation of 2:0. Find the 95% confidence interval for the mean temperature. Assume the temperatures are approximately normally distributed.
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Revenue and expense recognition and closing entries
: Two years ago, Sue Stern opened an audio book rental shop. Sue reports the following accounts on her income statement:
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Case study- dittenhoefer find china
: Case Study- Dittenhoefer's Find China - On which dimensions of quality does Dittenhoefer's compete? How are these dimensions being threatened by the problems in the manufacturing and customer service areas
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Calculate the mean and standard deviation of distribution
: Identify a real-life example or application of either the binomial or poisson distribution.
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Reconstruction of adjusting entries from account balances
: Zola Corporation records adjusting entries each month before preparing monthly financial state- ments. The following selected account balances are taken from its trial balances on June 30, 2014. The ''unadjusted'' columns set forth the general led..
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Find the range, mean, median, and mode of the data set.
: Determine which class has the greatest relative frequency and which has the least.
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Basis for adjusting entries-annual adjustments
: The following account balances are taken from the records of Laugherty Inc. at December 31, 2014. The Supplies account represents the cost of supplies on hand at the beginning of the year plus all purchases. A physical count on December 31, 2014, ..
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Customer for services rendered
: Flood received a $10,000, 4%, two-year note receivable from a customer for services ren- dered. The principal and interest are due on June 1, 2016. Flood expects to be able to collect the note and interest in full at that time.
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Find the total sample size needed if the two groups
: Find the number of cases needed if the design is 1:1 matched; matching criteria are various menstrual characteristics, exogenous estrogen use, and prior pelvic surgeries.
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Find the conditional distribution of x given n
: Express Var(X) in terms of p, E(N), and Var(N), by using the law of total variance.
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