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Statistical Hypothesis testing - Frequency distribution
Construct a frequency distribution for the data given below:
26
25
17
16
14
21
18
15
19
22
24
More than 13 successes in 19 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.) Fewer than 7 successes in 15 trials with a 40 percent chance of success. (Round the answer to 4 decimal places.)
Determine the probability of having more than 3 defects in a roll?
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
How large a sample should be taken if the desired margin of error E is:
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
Create a 95% confidence interval for population mean. Is it sensible that population mean is 28 weeks? give explanation for your answer.
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
Make up a scatter diagram with 10 dots for each of the following situations:
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
Suppose the assembly times follow normal distribution. Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
Would you expect the mean absolute percentage error to be more than or less than 0.25? Describe.
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