Question 1 A sports shop selects a random sample and records the sales of items made in China and those made in America. Country of Origin China 30 33 Mean 225 Std Deviation 9.75 11.6 America 3315 a) What is the SE Mean for the sales from China? b) Calculate a 95% confidence interval for the mean sales amount made in America

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Question 1
A sports shop selects a random sample and records the sales of items made in China and those
made in America.
Country of Origin
China
America
Mean
225
3315
Std Deviation
9.75
33
11.6
a) What is the SE Mean for the sales from China?
b) Calculate a 95% confidence interval for the mean sales amount made in America
Question 2
The probubility that a rose bud blooms is p, In a random sample of 500 rose buds, 240 of them
bloomed.
With the data obtained in a random sample, a hypothesis test at the 1% level of significance is
carried out to determine whether p is different from 0.45.
a) State the null and alternative hypothesis
b) Calculate the test Statistics
c) What is the p-value of the test?
d) Supporting your answer, state the conclusion of the test
Transcribed Image Text:Answer all questions Question 1 A sports shop selects a random sample and records the sales of items made in China and those made in America. Country of Origin China America Mean 225 3315 Std Deviation 9.75 33 11.6 a) What is the SE Mean for the sales from China? b) Calculate a 95% confidence interval for the mean sales amount made in America Question 2 The probubility that a rose bud blooms is p, In a random sample of 500 rose buds, 240 of them bloomed. With the data obtained in a random sample, a hypothesis test at the 1% level of significance is carried out to determine whether p is different from 0.45. a) State the null and alternative hypothesis b) Calculate the test Statistics c) What is the p-value of the test? d) Supporting your answer, state the conclusion of the test
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