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For a particular population, a sample of n = 9 scores has a standard error of 4. For the same population, a sample of n = 16 scores would have a standard error of ??
The area under a normal curve is always equal to 1, no matter what the mean and standard deviation are.
Is there evidence that the population mean amount is different from 8.17 ounces? (Use a 0.05 level of significance and determine the p-value and interpret its meaning.
For each of the following, identify the scale of measurement (NOIR) and the best measure of central tendency for the data.
Find the value of Proportion and construct a 90% confidence interval for proportion.
What is the probability of randomly selecting a student with a treadmill time greater than 25 minutes? In symbols, p(X>25)= ? What is the probability of randomly selecting a student with a time greater than 30 minutes? In symbols, p(x>30) ?
A person reads a research study of the effectiveness of perineal exercises in preventing urinary incontinence and notes that the number of subjects in each group is 120.
a. State the appropriate hypotheses for your significance test. b. Use the sample results to compute the test statistic and the p-value.
Constructing a 95% confidence interval for the true length of time for all pepper seeds to germinate you must calculate the margin of error. The margin of error in this case is 0.60.
Calculate a 3-period moving average for period 7. Compute the MAD of the forecast.
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
The president of Doerman Distributors, Inc., believes that 30% of the firm's orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time customers. Assume that the president is correct..
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
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