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Quick Start Batteries make 12 volt car batteries. The adverage life of a quiz start battery is normally distributed, with a mean of 45 months and a standard deviation of 8 months. if a random sample of 600 batteries is selected, how many batteries would weigh last more than 48 months?
if you sample 100 people and 20 turn out to be over 65 inches tall, you get $20. Which is better: a sample of size 100 or a sample of size 1,000? Choose one and explain. Does the law of averages relate to the answer you give?
What is an example of two variables that are likely to be correlated because they are both changing over time?
Critically discuss the main differences between descriptive and inferential statistics? Provide an example of either type of statistics either from a recent study you heard about or a made up study you'd be interested in learning about.
James Burke claims that about 70% of all single men would welcome a women taking the initiative in asking for a date. A random sample of 20 single men were asked if they would welcome a women taking the initiative in asking for a date.
Do you know if there is any differences in the densities of a product at certain temperatures. Here is the data that I received. Tell me if there is any difference.
Whenever the calculated value of t is equal to or greater than the tabled value of t, for a given number of degrees of freedom, then
Find the midrange for the following group of data items: what is the midrange rounded to the nearest tenth?
How many degrees of freedom must researcher use in her t-test critical value supposing that variances are equal?
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
A coin is flipped three times.a. Draw a tree diagram that represents all possibleoutcomes. b. Identify all branches that represent the event"exactly one head occurred.
Suppose you want an 85 percent confidence level. What value would you use to multiply the standard error of the mean?
Suppose that 30% of all adults in Ohio support the increase. The probability that at least 800 people support the increase is?
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