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A researcher wishes to estimate the proportion of adults who have high speed internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 99% confidence if (a) she uses a previous estimate of 0.56? (b) she does not use any prior estimates? n=_____(Round up to the nearest integer.)
Determine which variable is the dependent variable.
Based on our poll what is the margin of error of the proportion of voters favoring the incumbent?
Estimate the proportion of made 6-foot putts by professional golfers. Estimate the proportion of made 6-foot putts by amateur golfers. Which group had a better putting accuracy?
the mean score of the first calculus exam was 81. the standard deviation was 12. find the smallest interval about the
in how many ways can a photographer arrange 6 people in a row from a group of 10 people where the bride and groom are
Describe the shape of the distribution? what proportion of the players had no hits? how many players had 4 or fewer hits? what percentage of the players had one or fewer hits?
How many hunters must be included in the survey? Assume that data gathered in earlier surveys have shown € to be approximately 10.
Determine the shape of chi-square distribution?
a test for a certain disease is found to be 96 accurate meaning that it will correctly diagnose the disease in 96 out
What is the percentile rank for X=6? What is the percentile rank for X=9? For the following scores, the lowest value is X=13. Place the scores in a frequency table using.
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.) Use the five steps of hypothesis testing and explain your findings.
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