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The door frames used in an industrialised building system are of one standard size. If the heights of adults are normally distributed, men with a mean of 1.73m and standard deviation of 0.064m and women with a mean of 1.67 and standard deviation of 0.050m; then what proportion of men will have a clearance of at least 13cm with a frame height of 1.83m? (You need to use the standard Normal Distribution table)
A 0.3196
B 0.68
C 0.4577
D 0.577
a score that is 6 points below the mean corresponds to a z- score of z -0.50. what is the population standard
Quality Motors is an automobile dealership that regularly advertises in its local market area. It claims that a certain make and model of car averages 30 miles to a gallon of gas and mentions that this figure may vary with driving conditions. A local..
fine motor skills were measured in a sample of kindergarteners before and after 6 months of occupational therapy.
A researcher investigating sex role stereotypes and occupational aspirations drew a random sample of 125 female university students.
She chooses 40 new home sales at random and determine that average closing costs are $6600. Standard deviation of population is $120. Test her belief at µ = 0.05.
In a certain countrywide school district, a survey of 350 students showed that 28% carried their lunches to school. Find the 95% confidence interval of the true proportion of students who carried their lunches to school.
question 1 a pizza shop owner wishes to find the 95 confidence interval of the true mean cost of a large pizza. how
the waiting time for patients at local walk-in health clinic follows a normal distribution with a mean of 15 minutes
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
the lifetime of a certain type of calculator battery are normally distributed. the mean life is 400 hours and the
problem 1ab21383332405637582245254639572849344325412755a marketing specialist is assessing the effectiveness of two
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