Mathematics, 19.12.2019 06:31, laurachealsy923
As a major manufacturer of golf clubs, a major corporation wants to estimate the proportion of golfers who are right-handed. assume that the manufacturer has an estimate found from a previous study in scotland, which suggested that 75% of golfers are right-handed. how many golfers must be surveyed if they want the resulting confidence interval to be within 0.02 at 95% confidence? a. 2401 b. 2400 c. 1800 d. 9310 e. 1801
Answers: 3
Mathematics, 21.06.2019 17:00, moneyyfletcher
Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?
Answers: 2
Mathematics, 22.06.2019 01:30, kadinmorgan
Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10
Answers: 3
As a major manufacturer of golf clubs, a major corporation wants to estimate the proportion of golfe...
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