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A Wendy's franchise has been averaging about $5000 worth of business on a typical Saturday with a standard deviation of σ = $500. The manager is concerned that sales are slipping, after taking into account the average value of sales for four consecutive Saturdays being $4800.
Based on the sample findings, estimate the true mean of Saturday sales with 90% probability.
Determine the probability that a randomly selected teacher earns more than $525 per week?
An experiment consists of selecting a card at random from a 52-card deck. Refer to this experiment and find the probability of the event.
Determine the probability that sample mean is between 7.5 and 8 minutes?
Verify that this is valid density function. Find out probability that weight is smaller than 24 ounces.
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
Find out sample standard deviation (s) of scores Gordon Golfer made on his last four rounds (determine to the nearest one tenth, or .1).
Determine the probability distribution associated with these data.
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
Add line-of-best fit (trend line/linear regression line) to your scatterplot. Write down the equation of the trend line below.
In rectangular coordinate system, determine the distance between the points (-4,1) and (8,6).
The one-sample t statistic has the value t = -1.68. What do we know about the P -value of this test?
To find out the probability that the age of a randomly selected CEO. The average age of CEOs is 56 years. Suppose the variable is normally distributed.
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