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A survey is conducted to verify whether there is a connection between smokers and cardiovascular diseases. 35 over 60 persons with cardiovascular problems are smokers. Can we conclude that the majority of cardiovascular disease are smokers?
a. State the null hypothesis.
b. State the test you will use(one or two tails,Z or t)
c. Decide the level of significance (?r the conclusion level)
d. find the region of non rejection for your variable (or the region of rejection)
e. Find the value of your variable
f. decide if your null hypothesis is rejected or not
g. If we assume the proportion does not change what should be the sample size in order to reject the null hypothesis (in case it were not rejected)?
a. Determine if the problem is either a test of hypothesis, a confidence interval or something else and specify the 'key words' found in the problem that demonstrate your choice.
in a random sample of 60 refrigerators the mean repair cost was 150.00 and the standard deviation was 15.50. construct
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use the standard normal table to find the following probabilitiesa pz lt 1.27b pz gt 0.85c pz lt -2.66d p-3.15 lt z lt
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consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 175 or more of the new members are significantly overweight?
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Explain what property associated with the Central Limit Theorem you consider the most important contribution, enabling the use of the normal distribution for sample means.
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