A scatter diagram can show whether a pair of variables has a strong or weak relationship, and also whether it is linear or curved.
Indicate whether the statement is true or false
Q. 2A public policy research group is conducting a study of health care plans and would like to estimate the average dollars contributed annually to health savings accounts by participating employees.
A pilot study conducted a few months earlier indicated that the standard deviation of annual contributions to such plans was 1,225. The research group wants the study's findings to be within 100 of the true mean with a confidence level of 90. What sample size is required?A) 407
B) 361
C) 512
D) 546
Q. 3The Fallbrook Distributing Company has a soft drink bottling plant in Plano, Texas. Based on historical records, if its filling machine is working properly, the mean fill volume per can is 12.0 ounces with a standard deviation equal to 0.13 ounce.
Further, the distribution of fill amounts is known to be normally distributed. The State of Texas has a department whose job it is to check on such consumer-related processes as soft drink filling. The idea is to protect the consumer. The department arrives at the Fallbrook plant once a month on an unscheduled day. When they arrive, they randomly select n = 4 cans and carefully measure the volume in each can. If any of these cans contains less than 11.85 ounces, the plant is shut down until a full inspection of the filling process is performed. Based on this information, the probability that the plant will get shut down if it is operating properly is approximately 0.1251. Indicate whether the statement is true or false
Q. 4A production process that fills 12-ounce cereal boxes is known to have a population standard deviation of 0.009 ounce.
If a consumer protection agency would like to estimate the mean fill, in ounces, for 12-ounce cereal boxes with a confidence level of 92 and a margin of error of 0.001, what size sample must be used?A) 249
B) 351
C) 512
D) 211
Q. 5A scatter diagram can show that the relationship between two variables is actually nonlinear.
Indicate whether the statement is true or false
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