Recent content by aprilryan

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    MHB Margin of error and point estimate together

    Hey all I have one last question for you. I just need clarification on point estimate and margin of error as I have to find both in a problem. Let's say the endpoints are 5.9 and 8.1. When I do a margin of error problem, I subtract the mean of 7 from 8.1 right? When I do point estimate do I add...
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    MHB Empirical rule calculator command

    I haven't listened to Rush in a long time. Will give them a listen! A math helper who likes Rush is always a plus! Thanks again!
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    MHB Empirical rule calculator command

    Basically I subtract the mean 95-2 and also add 95+2 to get between 75 and 112 right? It's much clearer now thanks! Love the profile pic by the way!
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    MHB Empirical rule calculator command

    I just had a quick question. One problem says, "about 68% of the data will fall between what values?" Will I use the binompdf or normalcdf command on the TI-83 calculator? I can't remember. Thanks!
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    MHB How Does Cigarette Consumption Relate to Heart Disease Deaths?

    Sure! I got 0.607.
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    MHB How Does Cigarette Consumption Relate to Heart Disease Deaths?

    Nevermind I got i!
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    MHB How Does Cigarette Consumption Relate to Heart Disease Deaths?

    I just need a little assistance on the last two questions. I place per capita and death in L1 and L2 but I am lost. Country Per Capita Cigarette Consumption 3900...
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    MHB Need help on how to input invnorm and normalcdf using large numbers

    I got it now! Thanks!
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    MHB Need help on how to input invnorm and normalcdf using large numbers

    Well, I checked the answer key and for part b it says the answer is $15,564. Thanks again.
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    MHB Need help on how to input invnorm and normalcdf using large numbers

    The answer for a is .3824. The answer for b is 66800.21 (which I can sense is wrong). Yes, could you please check the answers for me? Thanks again.
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    MHB Need help on how to input invnorm and normalcdf using large numbers

    Hi, I'm a little unsure how to input large numbers into the TI-83 calculator using invNorm and normalcdf. Here's the question to the problem: A study of VCR owners found that their annual household incomes are normally distributed with a mean \$41,182 and a standard deviation of \$19,990...
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    MHB Binomial Experiments: Find Probability of x=5, x>=6, x<4

    Yes, it was .60. Thanks, I've got this one figured out!
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    MHB Binomial Experiments: Find Probability of x=5, x>=6, x<4

    Hi all, I'm a bit confused on this problem in my book. "Specify the values of n, p, and q and list the possible values of the random variable x. Sixty percent of U.S. adults trust national newspapers to present the news fairly and accurately. You randomly select nine U.S. adults. Find the...
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    MHB What is the expected outcome of a pick 3 lotto if a ticket costs $\$2$?

    Ok I think I got it. Took a while to process everything. This would be the setup, correct? .001 * 1000 + 1 * 2
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    MHB What is the expected outcome of a pick 3 lotto if a ticket costs $\$2$?

    Do I multiply .001 times 1000? Sorry can someone break it down step by step? I still don't get it.