Home Internet Access In a recent year, a study found that 76% of adults ages 18–29 had internet access at home. A researcher wanted to estimate the proportion of undergraduate college students (18–29years) with access, so she randomly sampled 190undergraduates and found that 167 had access. Estimate the true proportion with 99% confidence. Round intermediate answers to five decimal places. Round your final answer to one decimal place.

A publisher reports that 80% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 300 found that 74% of the readers owned a laptop. Determine the P-value of the test statistic. Round your answer to four decimal places.

A sample of 900 computer chips revealed that 68% of the chips fell in the first 1000 hours of their use. The companies promotional literature states that 67% of the chips fail in the first 1000 hours of their use. The quality control manager wants to test the claim that the actual percentage that fail is different from the stated percentage. Find the value of the test statistic. Round your answer to two decimals.

When you are done, click here to see a summary of your score Question with last attempt is displayed for your review only In a certain school district, it was observed that 29% of the students in the element schools were classified as only children (no siblings). However, in the special program for talented and gifted children, 130 out of 373 students are only children. The school district administrators want to know if the proportion of only children in the special program Is significantly different from the proportion for the school district. Test at the a 0.05 level of significance. What is the hypothesized population proportion for this test? P=0.34 (Report answer as a decimal accurate to 2 decimal places. Do not report using the percent symbol.) Based on the statement of this problem, how many tails would this hypothesis test have? one-tailed test two-tailed test Choose the correct pair of hypotheses for this situation: (A) (C) Ho p 0.29 0.29 (В) Но:P 0.29 Ho: p 0.29 H: p 0.29 (D)…

The data set shows the GDP per people in 24 countries, along with the proportion of person that have a linkedin social media account.   A. the covariance is ___ percentage dollars. be careful of the units. round to the nearest integer. B.  r=  ___     c. Choose the correct answer below.     A. There is no clear relationship between the GDP and LinkedIn accounts.   B. There is a strong positive relationship between the GDP and LinkedIn accounts.   C. There is a weak positive relationship between the GDP and LinkedIn accounts.   D. There is a strong negative relationship between the GDP and LinkedIn accounts.     GDP (PPP) Social Media Usage (%) 6,905 89 17,863 87 5,114 86 9,989 86 6,121 83 6,593 83 13,899 81 4,013 83 16,146 75 4,696 79 16,470 76 19,857 72 18,155 71 3,501 74 19,526 75 8,007 76 4,033 73 13,651 69 16,990 68 6,642 70 6,447 70 6,434 68 13,052 64 10,874 47

A publisher reports that 61 % of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 320 found that 55 % of the readers owned a particular make of car. Determine the P-value of the test statistic. Round your answer to four decimal places. Answer How to enter your answer (opens in new window) Tables Keypad Keyboard Shortcuts

Kelly’s batting average is .30 (they hit 3 out of every 10 pitches). Let’s assume there are 120 pitches thrown in the first 8 games. !. There is a 70% chance they should hit at least how many pitches this season? Round down for this answer.

Carmen and Rosanna are two employees in an electronics store. The store manager has put an emphasis on increasing the number of applications for the store credit card. The manager randomly selected 24 weeks for each employee and recorded the number of completed applications for each week, which is provided in the samples below. Each employee completed 21 applications in one of the weeks selected. Use Excel to calculate each employee's z-score for completing 21 applications. Round your answers to two decimal places. Carmen Rosanna11 56 1115 613 185 1114 1416 521 208 1110 97 1416 1513 1310 619 2118 95 1817 310 126 1712 1214 419 1017 8

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A study is planned to compare the proportion of teenagers (ages 13–19) who dislike anchovies with the proportion of young adults (ages 20–30) who dislike anchovies. A random sample of 41 teenagers was taken, and 78% of them disliked anchovies. A random sample of 56 young adults was also taken, and 71% of them disliked anchovies. Difference = Teenagers - Young Adults The picture below is the question. Use the information above to help.