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GINA LOCKHART

GINA L.

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Bradley Duda verified

Numerade educator

In the following data, x is the average number of hours the student spent working on math each week and y is the final grade in a math class. | hours/week x | Grade y | | :--- | :--- | | 5 | 48 | | 8 | 70.2 | | 10 | 69 | | 11 | 79.4 | | 11 | 76.4 | | 14 | 75.6 | | 15 | 91 | | 17 | 85.8 | | 19 | 99.6 | | 19 | 100 | The line of best fit is y = 3.14 * x + 39.01. What is the predicted value for the final grade when a student spends an average of 9 hours each week on math? Grade = Round to 1 decimal place.

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Bradley Duda verified

Numerade educator

Let ( hat{y} ) represent the profit (or loss) for a certain company ( x ) years after 1975 . Based on the data shown below, a statistician calculates a linear model ( hat{y}=2.22 x+3.61 ). egin{tabular}{|c|c|} hline( x ) & ( y ) \ hline 2 & 8.46 \ hline 3 & 9.69 \ hline 4 & 11.52 \ hline 5 & 16.35 \ hline 6 & 16.18 \ hline 7 & 19.81 \ hline 8 & 20.84 \ hline end{tabular} Use the model to estimate the profit in 1980. Round to the nearest cent. The estimated profit in 1980 is ( $ )

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James Kiss verified

Numerade educator

Suppose that 52% of all voters prefer the Democratic candidate. Let X be the number of people who prefer the candidate when 43 people are surveyed at random. When choosing a type of distribution, select B for Binomial, U for Uniform or N for normal. What is the distribution of X? X ~ B( , ) Please show the following answers to 4 decimal places. What is the probability that exactly 13 voters who prefer the Democratic candidate in the survey? What is the probability that less than 13 voters who prefer the Democratic candidate in the survey? What is the probability that at most 13 voters who prefer the Democratic candidate in the survey? What is the probability that between 12 and 23 (including 12 and 23) voters who prefer the Democratic candidate in the survey?

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INSTANT ANSWER

Exactly 4 of them live in poverty. b. At most 4 of them live in poverty. 0. 982 This is not a decimal or integer value. c. At least 3 of them live in poverty. P(X ≥ 3) = 1 - P(X ≤ 2) This is not a decimal or integer value. d. Between 1 and 4 (including 1 and 4) of them live in poverty. 0. 982 This is not a decimal or integer value. I keep getting the wrong answer from you

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