The Secretary of Welfare hypothesizes that the average district office has 5% or fewer fraudulent or...
The Secretary of Welfare hypothesizes that the average district office has 5% or fewer fraudulent or ineligible recipients. A sample of 10 offices reveals a mean of 4.7% with a standard deviation of 1.2%.
What can be said about the secretary’s hypothesis?
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The Secretary of Welfare hypothesizes that the average district
office has 5% or fewer fraudulent or...
According to district education office the average weight of higher primary students in that district is...
According to district education office the average weight of higher primary students in that district is 48kg. However, a researcher claims that the average weight of the students is less than 48kg and to verify this, the researcher takes a sample 8 Students and records their weights links). The average weight of eight students is 46 kg with standard deviation of 4.8 kg. Test the claim of the researcher at d = 0.05 level by Setting up null and alternative...
A past study claimed that adults in America spent an average of 18 hours a week...
A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 11.1 12.7 20.8 20.9 23.3 33.9 17 17.9 20.2 21.2 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5%...
A past study claimed that adults in America spent an average of 18 hours a week...
A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 12.0 13.3 22.6 22.9 22.5 33.1 16 17.2 20.1 20.3 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5%...
test the null hypothesis H0 H0 : In college, the average GPA of men is equal...
test the null hypothesis H0 H0 : In college, the average GPA of men is equal to the average GPA of women. H1 : In college, the average GPA of men is different from the average GPA of women. A sample of 10 men's GPA in college has sample mean 2.9, and a sample of 10 women's GPA has sample mean 3.1. We also know the GPAs of men and women have the same standard deviation 0.2. Calculate the p...
3.17 A bank branch located in a commercial district of a city has the business objective...
3.17 A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 P.M. lunch period. The waiting time, in minutes, is defined as the time the customer enters the line to when he or she reaches the teller window. Data col- lected from a sample of 15 customers during this hour are stored in Bank1 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 .50 6.10...
A random sample of 100 households was selected as part of a study on electricity usage,...
A random sample of 100 households was selected as part of a study on electricity usage, and the number of kilowatt-hours (kWh) was recorded for each household in the sample for the March quarter of 2016. The average usage was found to be 660 kWh and it was found that the standard deviation of the usage was 80 kWh. Construct a 90% confidence interval for the mean usage in the March quarter of 2016 Does the data provide significant evidence,...
Child Health and Development Studies (CHDS) has been collecting data Type numbers in the boxes. about...
Child Health and Development Studies (CHDS) has been collecting data Type numbers in the boxes. about expectant mothers in Oakland, CA since 1959. One of the 10 points measurements taken by CHDS is the weight increase in pounds) for expectant mothers in the second trimester. In a fictitious study, suppose that CHDS finds the average weight increase in the second trimester is 14 pounds. Suppose also that, in 2015, a random sample of 33 expectant mothers have mean weight increase...
1) Timothy has finished calculating a z-test. Now he turns to the table of z-scores to...
1) Timothy has finished calculating a z-test. Now he turns to the table of z-scores to find the: a) Critical value b) Test value c) calculated value d) obtained value 2) Joyce has calculated a Z-test with an alpha set to .05. She calculates a z-value of 6.36. What can she conclude? a) none of these b) reject the null hypothesis c) fail to reject the null hypothesis d) the result is too close to call 3) In order to...
In the past the average age of employees of a large corporation has been 40 years....
In the past the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of 25 employees was selected. The average age in the sample was 42.5 years with a sample standard deviation of 5 years. Using a significance level of α = .01, do the sample data provide support...
1. Jerry is a district manager for Home Depot and he recently implemented a new safety...
1. Jerry is a district manager for Home Depot and he recently implemented a new safety program in the 8 stores he manages. He would like to know if this new program has resulted in fewer accidents than other Home Depot stores. Jerry knows that the average number of accidents at any Home Depot is 4.2 a month with a standard deviation of 1.1. Jerry’s has the following accident data for his 8 stores. Use a single-sample z-test to determine...
According to district education office the average weight of higher primary students in that district is 48kg. However, a researcher claims that the average weight of the students is less than 48kg and to verify this, the researcher takes a sample 8 Students and records their weights links). The average weight of eight students is 46 kg with standard deviation of 4.8 kg. Test the claim of the researcher at d = 0.05 level by Setting up null and alternative...
A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 11.1 12.7 20.8 20.9 23.3 33.9 17 17.9 20.2 21.2 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5%...
3.17 A bank branch located in a commercial district of a city has the business objective of developing an improved process for serving customers during the noon-to-1:00 P.M. lunch period. The waiting time, in minutes, is defined as the time the customer enters the line to when he or she reaches the teller window. Data col- lected from a sample of 15 customers during this hour are stored in Bank1 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 .50 6.10...
Child Health and Development Studies (CHDS) has been collecting data Type numbers in the boxes. about expectant mothers in Oakland, CA since 1959. One of the 10 points measurements taken by CHDS is the weight increase in pounds) for expectant mothers in the second trimester. In a fictitious study, suppose that CHDS finds the average weight increase in the second trimester is 14 pounds. Suppose also that, in 2015, a random sample of 33 expectant mothers have mean weight increase...
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