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Every month a clothing store conducts an inventory and calculates losses from theft. The store would like to reduce these losses and is considering two methods. The first is to hire a security guard, and the second is to install cameras. To help decide which method to choose, the manager hired a security guard for six months. During the next 6-month period, the store installed cameras. The monthly losses were recorded and are listed below.
The manager decided that because the cameras were cheaper than the guard, he would install the cameras unless there was enought evidence to infer that the guard was better. What should the manager do? Use a 10% significance level.
In the cell that you used to make your decision, bold the font and format the number as a percentage with two digits after the decimal point.
Guard 355 284 401 398 477 254
Cameras 486 303 270 386 411 435
Find out the estimate of the population mean.The mean daily sales at the Stop and Go are $20,000 for a sample of 40 days. The standard deviation of the sample is $3,000.
Are people who live at higher altitudes slimmer?- Is there any evidence to suggest that the people living in Denver are thinner?
Calculate the percent of total deaths from each cause, and display the results in a pie chart. From the death rate (per 100,000 population) for heart disease, calculate the population for Minnesota for the year 1991.
a potential investor conducted a 144 day survey in each theater in order to determine the difference between the
Calculate the sample statistics and determine whether there is evidence that the mean blackness is less than 0.97. Write a memo to management that summarizes your conclusions.
Suppose you have a population with two men- one democrat; and one a republican; and two women- one a democrat and one a republican. For a simple random sample of size 2, all samples of size 2 have the same chance of being chosen.
in a recent study 32 convicts were given a course in great works of literature. to be accepted for the program the
Suppose we toss a coin once and let p be the probability of heads. Let X denote the number of heads and let Y denote the number of tails.
If a random sample of 8 adults is selected from the city, find the probability that exactly 3 adults respond that they enjoy using public transportation.
Consider the variable "type of birth control practiced" (e.g. IUD, condoms, none, etc.O) Which measure of variability is best suited to describe variation of this variable?
The outcome of the toss is announced to II. Then II must guess whether I chose the fair or biased coin. If II is correct there is no payoff. If II is incorrect, she loses 1. Draw the game tree.
an experiment is conducted in which 60 participants each fill out a personality test but not according to the way they
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