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SAT Math Suppose that scores on the SAT Math test are approximately normal with a mean of 500 and a standard deviation of 100. Let X denote the score on a randomly selected student. Use the Z table to find the following values.

A national survey of graduate students is conducted to assess their consumption of coffee. The following table summarizes the data. What proportion of coffee drinkers (caffeinated and decaffeinated) is female?     Do Not Drink Coffee Drink Decaffeinated Only Drink Caffeinated Coffee Male 145 94 365 Female 80 121 430   A)0.70 B)0.50 C)0.90 D)0.546

Complete part C. C. Compute an estimate of the population parameter.  Telephone survey of 2980 adults in certain country, 27% reported they own least one gun. Researchers want to estimate the true percentage of adults in that country that own at least one gun.

1.) I want to estimate the proportion of adults who like sci-fi movies. How many people should I poll to be 96% confident that I am within 1% of the population proportion?

Please solve this question below. Thank you! 9. Challenge A bag contains 200 red and blue marbles. Three people each took samples of 25 marbles and noted the number of red marbles. Person A 17 red marbles out of 25 marbles Person B 12 red marbles out of 25 marbles Person C 20 red marbles out of 25 marbles a. Combine the samples to make one large sample. Use that sample to predict the number of red marbles in a similar bag that contains 300 marbles. b. Explain how having a fourth sample would make the estimate better.

The top 6 companies and the amount each spent on advertising in billions of dollars are as follows: Company At&T Advertising ($ billions) 3.5 Verizon Procter & Gamble L'Oreal Comcast Ford 2.4 4.1 2.1 3.7 2.7 Find the interquartile range for advertising (in $ billions). O a. 2.000 O b. None of the answers is correct OC. 1.475 Od. 1.825 O e. 1.350

11 of 16 Angela has a monthly gross income of $3,000 and her expenses are $1,200. What is her back-end ratio? II

Please solve for a. Show complete and detailed solution

A. 30 minutes Keep Me Connected! Introduction Directions: Analyze the situation below and answer the questions that follow. According to a survey, the average daily usage of social media worldwide of global internet users amounts to 142 minutes per day. Sofia conducts her own survey among her friends to find out if their time spent on social media is significantly higher than the global survey. Google Before her survey, she formulated the following claims: Claim A: The average daily usage of social media of her friends is the same as the global average usage. The average daily usage of social media of her friends is higher than the global average usage. Claim B: The table shows Sofia's friends and their respective time spent on social media. Minutes per Day Spent on Social Media 132 148 Friend's Name Allen Bryan Ellen Jake Mindie Shamsi Candice 165 157 120 144 136 Dory Mitch 160 185 Mila 173