Mathematics, 23.12.2019 22:31 SushiMagic
Lat year, the mean dollar spent per transaction for online purchases is $206. the population standard deviation is not known. because of increased use of on-line purchasing, vista's vice president of electronic marketing believes that purchasing has increased. he randomly selects 100 customer accounts. the results of the sample found that customers spent a mean dollar amount of $214 on purchases with s= $55. (use alpha 5%) a) state the null and alternative hypothesis in symbols and in words. (3pts) b) calculate the expected results for the hypothesis test sampling distribution, assuming the null hypothesis is true. (i. e., name and graph of sampling distribution, mean and standard error) (3pts) c) identify the standard distribution that best approximates the sampling distribution. (1pts) d) formulate the decision rule(use either critical test scores or p-values) (3pts) e) determine the statistical results: test statistic, critical test statistic and p-value ( 6pts) f) determine the conclusion in terms of the null and alternative hypotheses. do the sample results indicate that the vice president's claim is supported at alpha = 5%? (4pts)
Answers: 1
Mathematics, 21.06.2019 15:30
Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5
Answers: 1
Mathematics, 21.06.2019 19:30
Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
Answers: 1
Lat year, the mean dollar spent per transaction for online purchases is $206. the population standar...
English, 07.05.2021 14:00
English, 07.05.2021 14:00
Mathematics, 07.05.2021 14:00
History, 07.05.2021 14:00
Mathematics, 07.05.2021 14:00
English, 07.05.2021 14:00
Mathematics, 07.05.2021 14:00
Mathematics, 07.05.2021 14:00
History, 07.05.2021 14:00
Mathematics, 07.05.2021 14:00
Health, 07.05.2021 14:00