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In the following situation, assume the random variable is normally distributed and use a normal distribution or a t-distribution to construct a 90% confidence interval for the population mean. If convenient, use technology to construct the confidence interval.
(a) In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 4.35 pounds and the standard deviation was 1.88 pounds.
(b) Repeat part (a), assuming the same statistics came from a sample size of 500. Compare the results.
(a) For the sample of 10 adults, the 90% confidence interval is ( ), ( ). Round to two decimal places as needed.
(b)Now assume the sample came from a sample size of 500. Compare the results.
To give 98% confidence interval for population mean μ, you would use critical value.
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each loation.
Consider an acceptance-sampling scheme in which factory takes delivery of a batch of components if random sample of 400 components contains fewer than M defectives.
What does r 2 of .73 tell us? Is this a strong or weak correlation? How can you tell?
An investment firm with 10,000 clients would like to accurately forecast the average dollar amount their current customer will deposit over the coming year.
Give a mathematical expression for the probability density function of driving distance.
Soft Drinks a vending machine automatically pours soft drinks into cups. As the amount of soft drink dispensed into a cup is normally distributed
Chi-square test for independent of attributes - A random sample of students is interviewed to determine if there is an association between class and attitude toward corporations?
Which distribution should be used to create 80% confidence interval?
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
Illustrate what amount of sales would be required to be a super savings club member. Elucidate amount of sales would be required to be a gold club status.
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
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