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The Saskatoon Credit Union selected a sample of 40 student chequing accounts. Below are their end-of-the- month balances, in dollars: $404 74 234 149 279 215 123 55 43 321 87 234 68 489 57 185 141 758 72 863 703 125 350 440 37 252 27 521 302 127 968 712 503 489 327 608 358 425 303 203
a. Tally the data into a frequency distribution using $100 as a class interval and $0 as the starting point.
b. Draw a cumulative frequency polygon.
c. The bank considers any student with an ending balance of $400 or more a "preferred customer." Estimate the percentage of preferred customers.
d. The bank is also considering a service charge to the lowest 10% of the ending balances. What would you recommend as the cut-off point between those who have to pay a service charge and those who do not?
1.the english department of a college has 8 male professors 9 female professors 14 male tas and 9 female tas. if one is
For the survey project draw a comparable diagram. This may take you more than one attempt and you should check your completed diagram carefully.
Suppose that two teams are playing a series of games, each of which is independently won by team A with probability p and by team B with probability 1-p. The winner of the series is the ?rst team to win four games. Find the expected number of game..
Carry out a survey to estimate a proportion in a population of your choice. Examples include the proportion of vehicles with only one occupant and the proportion of a university campus covered by tree canopy.
Go to the Web site of the National Association of Real Estate Investment Trusts (NAREIT) at http://www.nareit.org. Click on ‘‘Investing in REITs''.
15% were contaminated with salmonella, and 13% were contaminated with both of these bacteria. What is the probability that a tested chicken chosen at random is: contaminated with salmonella and not campylobacter.
a manufacturer knows that their items have a normally distributed lifespan with a mean of 3.1 years and standard
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
In deciding whether to perform mandatory drug testing, we claimed that it is difficult to justify such testing under reasonable conditions.
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses. For each design, specify and justify each of the four factors and calculate the estimated sample size..
Mean salary? Last year a small accounting firm paid each of its five clerks $22,000, two junior accountants $50,000 each, and the firm's owner $270,000.
1. find the margin of error for the given values of csand nc0.95s3.1n812. construct the confidence interval to find the
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