The length of a 95% confidence interval for mean Age is which of the following? (Because of potential roundoff, choose the closest.)
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The length of a 95% confidence interval for mean Age is which of the following? (Because of potential roundoff, choose the closest.)
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- Kdjsjwjeiwiwkwhat happened to cosydyRefer to the table summarizing service times (seconds) of dinners at a fast food restaurant. How many individuals are included in the summary? Is it possible to identify the exact values of all of the original service times? Time (sec) 60-119 120-179 180-239 240-299 300-359 55 individuals are included in the summary. (Type a whole number.) Is it possible to identify the exact values of all of the original service times? Frequency 8 22 16 3 6 (…) O A. Yes. The data values in each class are equal to the corresponding class midpoint. O B. Yes. The data values in each class are spread evenly across the full length of the class. O C. No. The frequency distribution tells nothing about the data values that fall below the lowest class limit or above the highest class limit. O D. No. The data values in each class could take on any value between the class limits, inclusive.
- Explain the deretmaineThe largest possible number in Stata can be stored in a variable of type float O double O long O intA twin study was performed on the relationship between bone density and cigarette consumption. Forty-one pairs of middle-aged female twins who were discordant for tobacco consumption (had different smoking histories) were enrolled in a study and invited to visit a hospital for a measurement of bone density. Tobacco consumption was expressed in terms of pack-years. One pack-year is defined as 1 pack of cigarettes per day (usually about 20 cigarettes per pack) consumed for 1 year. One advantage of using twins in a study such as this is that genetic influences on bone density are inherently controlled for. To analyze the data, the investigators first identified the heavier- and lighter-smoking twins in terms of pack-years. The lighter-smoking twin usually had 0 pack-years (indicating she had never smoked) or occasionally either smoked very few cigarettes per day and/or smoked for only a short time. The researchers then looked at the difference in bone-mineral density (BMD) (calculated by…
- Refer to the table summarizing service times (seconds) of dinners at a fast food restaurant. How many individuals are included in the summary? Is it possible to identify the exact values of all of the original service times? Time (sec) Frequency 60-119 9 120-179 23 180-239 13 240-299 3 300-359 4 ___ Individuals are included in the summary (has to be whole number)The Fundamental Principle of countingThe table below contains the periodontal status of individuals and their sex. Periodontal status refers to gum disease where individuals are classified as either Healthy, have Gingivitis, or have Periodontal Disease (Perio). Female Male Total Healthy 2108 1124 3232 Gingivitis 1582 937 2519 Perio 873 931 1804 Find Pr{Gingivitis). If necessary, round your answer to 3 places after the decimal. Total 4563 2992 7555