Help with these from my chapter 18 assignment please

In a clinical trial, 25 out of 854 patients taking a prescription drug daily complained of flulike symptoms. Suppose that it is known that 2.5% of patients taking competing drugs complain of flulike symptoms. Is there sufficient evidence to conclude that more than 2.5% of this drug's users experience flulike symptoms as a side effect at the a =0.1 level of significance? Because npo (1 - Po) = 10, the sample size is 5% of the population size, and the sample the requirements for testing the hypothesis satisfied. (Round to one decimal place as needed.)A certain drug can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reux. The manufacturer of the drug claims that more than 91% of patients taking the drug are healed within 8 weeks. In clinical trials, 206 of 222 patients suffering from acid reux disease were healed after 8 weeks. Test the manufacturer's claim at the 0: = 0.05 level of signicance. Click here to view the standard normal distribution table (page 1) Because npo (1 - p0) = V 10, the sample size is l 5% of the population size, and the sample l the requirements for testing the hypothesis V satised. Click here to view the standard normal distribution table (page 2)_. (Round to one decimal place as needed.) According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.37. Suppose a random sample of 114 traffic fatalities in a certain region results in 56 that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the a = 0.1 level of significance? Because npo (1 - Po) = 10, the sample size is 5% of the population size, and the sample the requirements for testing the hypothesis satisfied. (Round to one decimal place as needed.)In a previous poll, 29% of adults with children under the age of 18 reported that their family ate dinner together seven nights a week. Suppose that, in a more recent poll, 322 of 1195 adults with children under the age of 18 reported that their family ate dinner together seven nights a week. Is there sufficient evidence that the proportion of families with children under the age of 18 who eat dinner together seven nights a week has decreased? Use the a = 0.01 significance level. Because npo (1 - Po) = 10 and the sample size is 5% of the population size, and the sample the requirements for testing the hypothesis satisfied. (Round to one decimal place as needed.)Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. A recent survey found that 248 of 700 parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. Do parents feel differently today than they did twenty years ago? Use the a = 0.1 level of signicance. Because npo (1 - p0) = l V 10, the sample size is V 5% of the population size, and the sample V the requirements for testing the hypothesis V satised. (Round to one decimal place as needed.) Two professors at a local college developed a new teaching curriculum designed to increase students' grades in math classes. In a typical developmental math course, 57% of the students complete the course with a letter grade of A, B, or C. In the experimental course, of the 16 students enrolled, 12 completed the course with a letter grade of A, B, or C. Is the experimental course effective at the a = 0.025 level of significance? Complete parts (a) through (9). (a) State the appropriate null and alternative hypotheses. Ho: versus H1 : (Type integers or decimals. Do not round.)Previously, 5% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is less than 5% today. She randomly selects 120 pregnant mothers and finds that 3 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.1 level of significance. What are the null and alternative hypotheses? Ho: versus H1 : (Type integers or decimals. Do not round.)For every football game there is a team that is expected to win by a certain number of points. In betting parlance, this is called the spread. If point spreads are accurate, we would expect about half of all games played to result in the favored team winning (beating the spread) and about half of all games to result in the team favored to not beat the spread. The accompanying data represent the results of 45 randomly selected games where a 0 indicates the favored team did not beat the spread and a 1 indicates the favored team beat the spread. Do the data suggest that sport books establish accurate spreads? a Click the icon to view the spread results. Because npo (1 - p0) = V 10, the sample size is l 5% of the population size, and the sample l the requirements for testing the hypothesis V satised. (Round to one decimal p ace as needed.) 0 0 1 -4 4200 - 0 oo -0 -200 0 O -O0 0 - -0 0 1 O-0 - -420 0 1 1 1 1 1 0