The length of time a person takes to decide which shoes to purchase is normally distributed with a mean of 8.54 minutes and a standard deviation of 1.91. Find the probability that a randomly selected individual will take less than 6 minutes to select a shoe purchase. Is this outcome unusual?     Probability is […]

Let x represent the height of first graders in a class. This would be considered what type of variable:     Nonsensical     Lagging     Discrete     Continuous    Question 2Let x represent sheets of paper in a package. This would be considered what type of variable:    Discrete     Continuous […]

In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 34% would be considered a:     Statistic     Population     Parameter     Sample    Question 2The chances of winning the Maryland lottery are one chance in twenty-two million. The probability would be considered an example of: […]

Given the following information, find the probability that a randomly selected student will be very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21     28.8%     21.6%     21.0%     39.4%    Question 2Given the following information, find the probability that a randomly […]

Descriptive Statistics Describe the difference between bar charts, histograms, Pareto charts, including how they are structured and in what situations are each most effectively used?   2. Histogram – 4 Classes   2. Given the following data points, describe the steps to create a histogram with 4 classes.             5  […]

Among 500 people at the concert, a survey of 35 found 28% found it too loud. What is the population and what is the sample?     Population: 500 at that concert; Sample: the 28% who found it too loud     Population: all concert goers; Sample: the 28% who found it too loud   […]

If neighbors wanted to have a speed bump installed on one part of the road, which statistical method would be most effective.     Regression with speed as the dependent variable     Hypothesis testing with a null hypothesis that the speed is less than or equal to the posted speed     Hypothesis testing […]

The coefficient of determination is represented by what notation?     r     β     ρ     r2   Question 2(CO 6) Two variables have a negative linear correlation. Does the independent variable increase or decrease as the dependent variable increases?     Independent variable decrease     Independent variable would remain […]

A company claims that its heaters last less than 5 years. Write the null and alternative hypotheses and note which is the claim.     Ho: μ ≥ 5, Ha: μ < 5 (claim)     Ho: μ > 5 (claim), Ha: μ ≤ 5     Ho: μ ≤ 5, Ha: μ > 5 […]

From a random sample of 55 businesses, it is found that the mean time that employees spend on personal issues each week is 4.9 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues?     (4.82, 4.98)     (4.83, 4.97) […]