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Independent samples selected from two populations

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The following information is obtained from two independent samples selected from two populations.

n1 =650        ¯x1 =1.05      σ1 =5.22

n2 =675        ¯x2 =1.54      σ2 =6.80

a. In selecting which version of the z/t test of means to use, consider the sample size and whether you are given the population or sample standard deviations. Given the data above, will you use a z or t test?

b. What is the value of z? Round to two decimal places.

c. Would you reject the null hypothesis? YES or NO

Reference no: EM131803959

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