Suppose that Steph Curry's cumulative free throw percentage, one month into the NBA season, is below 80%, but that one game later it is above 80%. Did there have to be a moment where his cumulative free throw percentage was exactly 80%? If no, give a simple numerical example showing how this might fail to happen. If yes, explain why there must have been such a moment.

Jerry is considering opening a new ice cream store at a certain location on State Street in Madison. Jerry conducts some analysis and determines that a given location is acceptable only if the number of pedestrians passing the potential location averages more than 100 per hour. To check if this location is acceptable, Jerry records the number of pedestrians observed for each of 40 hours. Jerry finds that the average number of pedestrians that pass the potential location during each of the 40 hours he was observing, is 105.7 per hour. Jerry assumes that he knows the population standard deviation to be 16. Can Jerry conclude at the 1% significance level that the potential location for the ice cream store is acceptable? a. What is the correct set of hypotheses? Answer: Ho: u = 100 and H1: u> 100 v b. Determine the p-value Answer: 0.0122 c. Interpret the results Answer: There is not enough evidence d. Jerry is concerned with committing a Type II error. Determine the probability of Type II…

A researcher wants to know whether children with ADHD tend to watch more TV than children who are not diagnosed with the disorder. To examine this, a researcher obtains a sample of n = 36 children (ages 8 to 12 years) who have been diagnosed with ADHD. Each child is asked to keep a journal recording how much time each day is spent watching TV. The average for the sample is M = 4.9 hours/day. Assume that the average TV-watching time for the general population of 8-to-12-year-old children is µ = 4.1 hours/day with σ = 1.8. Is ADHD in children associated with an increased amount of TV-watching?

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A department store will place a sale item in a special display for a one-day sale. Previous experience suggests that 29 percent of all customers who pass such a special display will purchase the item. If 2,027 customers will pass the display on the day of the sale, and if a one-item-per-customer limit is placed on the sale item, how many units of the sale item should the store stock in order to have at most a 1 percent chance of running short of the item on the day of the sale? Assume here that customers make independent purchase decisions. (Round your answer to nearest whole number.) Number of units

The number of employees working for Fly Me to the Moon Airlines in 2005 was 16,633, with an expected decrease of 4.4%4.4% per year. At the rate of decrease given, what is the expected number of employees working at Fly Me to the Moon Airlines in 2006? Round your answer to the nearest integer.

A researcher gives a depression scale to 300 people now, 6 weeks later, and 6 months later. She finds that the depression scale means are relatively the same over those three time periods. Does this mean that the depression scale is valid, and/or reliable? Explain.

The values listed below  are waiting  times (in minutes) of customers  at 2cdifferent banks. At Bank A, customers  enter a single waiting  line that feeds three teller windows.  At Bank B, customers  mayventer any one of three  different  lines that have formed  at three  teller windows.  Answer the following questions.   Bank A 6.3  6.6  6.7  6.8   7.1  7.2  7.5 7.8  7.8 Bank B  4.1  5.5  5.8  6.1  6.7  7.7  7.7  8.4  9.3  10.0 Construct a  95% confidence  interval  for the population  standard  deviation  at  Bank  A

just the last part, thank you!

A recent study indicated that 24% of the 137 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions. How large a sample must you take to be 99% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? If no estimate of the sample proportion is available, how large should the sample be?