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An insurance industry report indicated that 40 percent of those persons involved in minor traffic accidents this year have been involved in at least one other traffic accident in the last five years. An advisory group decided to investigate this claim, believing it was too large. A sample of 200 traffic accidents this year showed 74 persons were also involved in another accident within the last five years. Use the .01 significance level.
a. Compute the value of z and state your decision regarding the null hypothesis.
b. Determine and interpret the p-value.
Sales manager wishes to award sales representatives who earn the largest commissions a bonus of= $1,000 .He can award bonus to 20% of representatives. Determine cutoff point between those who earn bonus and those who don't?
Assume that the amount your town's population grows every year is fixed or constant. Utilize your equation in part b to approximate the population in the year 2030.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
If one item is chosen at random, determine these probabilities. It is a TV
Developing the histogram and pie chart for the sample data.
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
A researcher was interested in determining whether incentives affect the response rate in surveys. A simple random sample of 50 adult residents of a large city was selected. All were mailed a survey and promised a check upon returning a completed ..
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1.
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
Can it be concluded that, X, number of boys in two-child families of preeminent scholars, is binomiallydistributed? Let α=0.05.
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