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According to a recent survey, about 33% of Americans polled said that they would likely purchase reusable cloth bags for groceries in order to reduce plastic waste. Suppose 45 shoppers are interviewed a local supermarket.
a. Describe the sampling distribution for the sample proportion by naming the model and determining its mean and standard deviation.
b. What is the probability that no more than 28% of shoppers say that they are likely to purchase reusable cloth bags for groceries?
c. What is the probability that between 28% and 38% of shoppers say that they are likely to purchase reusable cloth bags for groceries?
A 95% confidence interval for µ is found to be 652 ± 21.56 = ($630.44, $673.56). Determine which of the following statements is true.
in planning for hot water requirements the manger of the luxurion hotel finds that guests spend a mean time of 10.3
Suppose you want to estimate the sample size for a multiple correlation analysis. There are five predictors in your study.
an experiment has four equally likely outcomes e1 e2 e3 and e4.a. what is the probability that e2 occurs?b. what is the
Do you favor recycling in your neighborhood
A new company is manufacturing light bulbs. The CEO claims that the average light bulb lasts 260 days. A researcher selects 25 bulbs for testing. The sample bulbs last an average of 250 days with a standard deviation of 20 days.
Using the table below, compare and contrast the main differences between two quantitative research designs and two qualitative research designs.
A random sample of rivets from 2 suppliers were compared to see what the mean diameter was from each and a test to determine whether the population means were the same for the 2 suppliers. Now a comparison of the variation in diameter is needed.
Rewrite in the following alternative format with left and right endpoints:Would a given mean value of 79.56 be likely, given the calculated confidence interval?
A sample of households that subscribe to the United Bell Phone Company revealed the following numbers of calls received by each household last week. Determine the mean, median, and standard deviation of the number of calls received.
What is the probability that a simple random sample of automobile insurance policies will have a sample mean within 25 of the popluation mean.
In a class, the grade of a student on an exam is an RV with expectation 60 and variance 16. If the class average is between 55 and 65, with a probability greater than or equal to 0.9, determine the number of students that have taken the exam.
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