Assuming the population standard deviation are equal

Assignment Help Other Subject

Reference no: EM13337935

A sample of 40 investment customers serviced by an account manager are found to have had an average of $23,000 in transaction during the past year, with a standard deviation of $8,500. A sample of 30 customers serviced by another account manager averaged $28,000 in transaction,with a standard deviation of $11,000. Assuming the population standard deviation are equal,use the 0.05 level of significance in testing whether the population means could be equal for customers serviced by the two account managers. Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for this test ? Construct and interpret the 95% confidence interval for the difference between the population means.

Reference no: EM13337935

Questions Cloud

Total number of observations must equal : In a completely randomized design for ANOVA, the number of degrees of freedom for the numerator and denominator are 4 and 25,respectively. The total number of observations must equal.

Findings of the hypothesistest : When companies are designing a new product, one ofthe steps typically taken is to see how potential buyers react to apicture or protype of the proposed product.The product-developmentteam for a notebook computer company has shown picture A to a large..

Identify and interpret the p-value for the test : In a study by WebCriteria,it took an average of 2.1 minutes to locate information and buy products on the Delta Airlines website,compared to an average of 2.7 minutes on the British Airways site.

Test null hypothesis that population variances are equal : For two samples from what are assumed to be normally distributed populations, the sample sizes and standard deviationsare n1 = 10, s1= 23.5, n2 =9, ands2 = 10.4. At the 0.10 level of significance, test the null hypothesis that the population variance..

Assuming the population standard deviation are equal : A sample of 40 investment customers serviced by an account manager are found to have had an average of $23,000 in transaction during the past year, with a standard deviation of $8,500. A sample of 30 customers serviced by another account manager aver..

Assuming normal populations with equal standard deviations : An educator is considering two different videotapes foruse in a half-day session designed to introduce students to thebasics of economics. Students have been randomly assigned to twogroups,and they all take the same written examination after viewingt..

Should we reject the directors claim : The director of admissions at a large university says that 15% of high school juniors to whom she sends university literature eventually apply for admission. In a sample of 300 persons to whom materials were sent,30 students applied for admission. In..

Preliminary study the population standard deviation : A consumer agency has retained an independent testing firm to examine a television manufacturer's claim that its 25-inch console model consumes just 110 watts of electricity.

Favor of the airlines e-mail idea : An airline has surveyed a simple random sample of air travelers to find out whether they would be interested in paying a higher fare in order to have access to email during the flight.

User Account

All Pages