The Average American Gets A Haircut Every 38 Days Is The Average Smaller For College Students The Data Below Shows The 1 (67.01 KiB) Viewed 115 times
The Average American Gets A Haircut Every 38 Days Is The Average Smaller For College Students The Data Below Shows The 2 (31.8 KiB) Viewed 115 times
The Average American Gets A Haircut Every 38 Days Is The Average Smaller For College Students The Data Below Shows The 3 (41.5 KiB) Viewed 115 times
The average American gets a haircut every 38 days. Is the average smaller for college students? The data below shows the results of a survey of 16 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 31, 39, 28, 28, 36, 39, 43, 24, 32, 43, 39, 30, 39, 43, 44, 33 What can be concluded at the the a = 0.01 level of significance level of significance? = a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer H: ? Select an answer c. The test statistic ? - (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 3 decimal places.) e. The p-value is pva f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that ... The data suggest the population mean is not significantly lower than 38 at a = 0.01, so there is sufficient evidence to conclude that the population mean number of days between haircuts for college students is equal to 38. The data suggest the populaton mean is significantly lower than 38 at a = 0.01, so there is sufficient evidence to conclude that the population mean number of days between haircuts for college students is lower than 38. The data suggest the population mean number of days between haircuts for college students is not significantly lower than 38 at a = 0.01, so there is insufficient evidence to conclude that the population mean number of days between haircuts for college students is lower than 38.
Is A newsgroup is interested in constructing a 99% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 510 randomly selected Americans surveyed, 390 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all Americans who favor the new Green initiative is between b. If many groups of 510 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about percent will not contain the true population proportion. and
The mayor is interested in finding a 90% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 151 residents whose mean number of pounds of trash generated per person per week was 34.7 pounds and the standard deviation was 8.6 pounds. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? distribution. b. With 90% confidence the population mean number of pounds per person per week is between and pounds. c. If many groups of 151 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of pounds of trash generated per person per week and about percent will not contain the true population mean number of pounds of trash generated per person per week.
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