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In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was $43.51 with standard deviation $2.75. The weekly amounts are approximately bell-shaped.
Estimate the percentage of amounts that are between $38.01 and $49.01__________?
Approximately 95% of the amounts fall between $38.01 and $49.01
Between what two values will approximately 68% of the amounts be?
Approximately 68% of the amounts fall between $______ and $________?
What is the probability that the sample mean breaking strength of a random sample of 100 pieces of fabric is less than 1 .8 kg/mm?
Let R designate the event that it rains. Formulate the distinctions R and R' (where R' means "Not R") so that they are mutually exclusive.
Are there any problems to the corporation or to Ms. Zamora?
Problem: Assume IQ scores in a certain population are normally distributed with a mean of 121 and a standard deviation of 13.
Approximately 80% of all marketing personnel are extroverts, whereas about 70% of all computer programmers are introverts. Round answers to three decimal places
A financial institution has decided to open an office in a certain commu- nity if it can be established that the median annual income of families in the community is greater than $90,000. To obtain information, a random sample of 80 families was ..
The data below shows gas sales to different categories of customers in 1992 and in 2002. Use appropriate bar charts to highlight key changes over this period.
There are two boxes, the odd box containing I black marble and 3 white marbles, and the even box containing 2 black marbles and 4 white marbles.
Describe the relationship between Quality of Service and Tip Size.- Find and interpret the value of R2 in this context.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
suppose that x represents a single observation from the distn given by fx theta thetaxtheta - 1 for 0 lt x lt 1find
an emergency breakdown service suggests that 50 of all drivers are registered with their service. a random sample of
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