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Use the Empirical Rule to answer the questions below:
The distribution of weights for newborn babies is approximately normally distributed with a mean of 7.5 pounds and a standard deviation of 0.8 pounds.
1. What percent of newborn babies weigh more than 8.3 pounds? Incorrect 16%
2. The middle 95% of newborn babies weigh between Incorrect and Incorrect pounds.
3. What percent of newborn babies weigh less than 5.9 pounds? Incorrect %
4. Approximately 50% of newborn babies weigh more than Incorrect pounds.
5. What percent of newborn babies weigh between 6.7 and 9.9 pounds?
Are the groups independent? Examine the means and SDs for each of the groups.
Find numbers a, b, c, and d such that a + bX and c + dY both have mean 500 and standard deviation 100.
A candy company claims that 20?% of its plain candies are? orange, and a sample of 200 such candies is randomly selected.
a survey of an urban university population of 25450 showed that 750 of 1100 students sampled attended a home football
In successive rolls of a fair die, let X be the number of rolls until the first 6 appears. Determine the probability function and the distribution function of X
An opinion poll uses random digit dialing equipment to dial 2000 randomly chosen residential telephone numbers. Of these, 621are unlisted numbers. State whether number 621 is a parameter or a statistic. State whether number 35% is a parameter or a ..
Provide an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
What is the probability that a sample of 35 seniors owes a mean of more than $18,000?
The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Construct a stem-and-leaf diagram for the data:
A set of data is normally distributed with a mean of 3.5 and a standard deviation of 0.6. State whether the first area is bigger, the second area is bigger.
Independent samples are taken of a random variable X.- If the PDF of is uniform over the interval - Write the approximation as an equation.
A clinical trial is planned to compare an experimental medication designed to lower blood pressure to a placebo.
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