In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation in statistical polling is the margin of error - the largest (reasonble) error that the poll could have. For example, a poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% (72% minus 4% to 72% plus 4%). In a (made-up) poll, the proportion of people who like dark chocolate more than milk chocolate was 32% with a margin of error of 2.2%. Describe the conclusion aboutp using an absolute value inequality. The answer field below uses the symbolic entry option in Mobius. That lets you type in a vertical bar | to represent absolute values. Also, when you type in < and then =, the symbolic entry option will automatically convert that to <. In the same way, if you type in > and then =, the symbolic entry option will automatically convert that to 2. Be sure to use decimal numbers in your answer (such as using 0.40 for 40%).

We'd like to know the percentage of people living in California who owns a cell phone. How many people in California must be surveyed in order to be 95% confident that the sample proportion is in error by no more than 4 percentage points?

A marketing company is interested in the proportion of people that will buy a particular product. Match the vocabulary word with its corresponding example

Please answer questions below Below is a sample of 64 responses of a survey of Ward 3 residents in Washington, D.C.     The survey asked "Do you support the statehood of Washington, D.C.?"       "Yes" was recorded as "1" and "No" was recorded as "0" in the table.                           Statehood?   a. What is the sample proportion of residents who support DC statehood?   1                   1                   1                   1                   0                   1   b.  If the population proportion of residents who support DC statehood is 0.7,  1   what is the standard error of the proportion?       0                   0                   0                   1                   1   c. Is the sampling distribution of the proportion normally distributed?   0                   1                   1                   0                   1   d.  What is the probability of a sample proportion being greater than    1   the value of…

In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation in statistical polling is the margin of error - the largest (reasonble) error that the poll could have. For example, a poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% (72% minus 4% to 72% plus 4%). In a (made-up) poll, the proportion of people who like dark chocolate more than milk chocolate was 44% with a margin of error of 2.2%. Describe the conclusion about p using an absolute value inequality. The answer field below uses the symbolic entry option in Mobius. That lets you type in a vertical bar | to represent absolute values. Also, when you type in and then =, the symbolic entry option will automatically convert that to >.

A programmer plans to develop a new software system.  In planning for the operating system that he will use, hee needs to estimate the percentage of computers that use a new operating system.  How many computers must be surveryed in order to be 90% confident that his estimate is in error by no more than one percentage point.   Complete part (a) through (c) below. a. n= b  Assummer  that a recent survey suggests that about 86% of computers use a new operating system. c. Does the additional survey information from part (b) have much of an effect on the sample size that is required?

a researcher wants to find the proportion.  what size sample should be obtained in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 3%.  Round to nearest whole number

Please answer D, E, and F.

If the proportion of Hs is .45 out of 200 flips, what is the p-value?

If the proportion of Hs is .45 out of 50 flips, what is the p-value? Round to three places.