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A researcher reports a mean pulse rate of 80 for the ampled patients. the data also revealed a standard deviation of 10.5. what percent of patients pulse rates will fall between 69.5 ans 90.5?
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection.
If this study involved a repeated measures design (within subjects) comparing conditions with the same number of participants, how many participants would be in each group?
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 93 percent confident that the true proportion is estimated to within 0.014?
A medical team wants to determine which form of mastectomy is most effective for prolonging life for women with breast cancer: radical mastectomy (removal of breast, chest muscles, and lymph nodes), simple mastectomy (removal of the breast only).
The analysis produces SS(within treatments) = 32, SS(between treatments) = 40, and SS(total) = 72. For this analysis, what is the MS(within treatments)?
The study was done to distinguish people's religion with how many days that they have said they have been calm in past three days. Determine proportion of Catholics were calm for 1 out of 3 days?
Mean = 14.2, s² = 5.92 and sum of X squared EX² = 2941.60. What can be concluded about age differences in problem solving ability?
The standard error of the estimate can be used to determine a range within which the independent X variables can be predicted with varying degrees of statistical confidence based on the regression coefficients and the value for the Y variable.
Give an example of a function using a set of at least 4 ordered pairs. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and 5.
A marketing analyst was studying the readability of two advertisements, each produced by a major company, and printed in the newspaper.
Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
After computing a confidence interval, the investigator believes that the results are meaningless because the width of the interval is too large. In reconstructing the interval, the investigator should: decrease the sample size.
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