Good evening, I need answers to these questions please.

1.) Part 4? Is/Is Not?

Are you smarter than your older brother? In a study of birth order and intelligence, IQ tests were given to 18 and 19year old men to estimate the size of the difference, if any, between the mean IQs of rstbom sons and secondbom sons. The following data for 10 rstborn sons and 10 secondborn sons are consistent with the means and standard deviations reported in the article. It is reasonable to assume that the samples come from populations that are approximately normal. Can you oonclude that the mean IQ of rstborn sons is less than the mean IQ of secondbom sons? Let u] denote the mean IQ of rstborn sons and p2 denote the mean IQ of secondme sons. Use the a: 0.05 level and the Pvalue method with the 1184 Plus calculator. Fl rstborn 34 100 109 117 8'? 93 102 106 107 9D Secondbom 120 112 113 81 111 85 99 88 100 98 State the appropriate null and alternate hypotheses. Ho: "1:": H1: plp{0 This isa lefttailed 1' test. Compute the Pvalue. Round the answer to four decimal places. Part 4 of 4 State a conclusion. There (Choose one) enough evidence to conclude that the mean IQ of firstborn sons is less than the mean IQ of secondborn sonsLow-fat or Inwcarb? Are lowfat diets or lowcarb diets more effective for weight loss? A sample of 76 subjects went on a low carbohydrate diet for six months. At the end of that lime, the sample mean weight loss was 4.6 kilograms with a sample standard deviation of 7.0? kilograms. A second sample of 78 subjects went on a lowfat diet. Their sample mean weight loss was 2.6 kilograms with a standard deviation of 5.83 kilograms. Can you conclude that the mean weight loss of subjects having lowcarb diets is greater than the mean weight loss of subjects having lowfat diets? Let p] denote the mean weight lost on the lowcarb diet and p2 denote the mean weight lost on the lowfat diet. Use the 11: 0.01 level and the "Fl84 Plus calculator. State the appropriate null and alternate hypotheses. H1 : "I p2 > 0 This hypothesis test is a righttailed 1' test. Compute the Pvalue. Round the answer to four decimal places. Determine whether to reject H0. the null hypothesis H0. Part 4 of 4 State a conclusion. There (Choose one) enough evidence to conclude that the mean weight loss of subjects having low-carb diets is greater than the mean weight loss of subjects having low-fat diets.Pollution and altitude: In a random sample of 331 cars driven at lowr altitudes, 52 of them exceeded a standard of 11 grams of particulate pollution per gallon of fuel consumed. In an independent random sample of 85 cars driven at high altitudes, 23 of them exceeded the standard. l[Ian you conclude that die proporljon of highaltitude vehicles exceeding the standard differs from the proportion of lowaltitude vehicles exceeding the standard? Let p1 denote the proportion of lowaltitude vehicles exceeding the standard and p2 denote the proportion of highaltitude vehicles exceeding the standard. Use the a: 0.01 level of signicance and die Pvalue memod with the 1184 Plus calculator. State the appropriate null and alternate hypotheses. This hypothesis test is a twotailed 1' test. Find the Pvalue. Round the answer to four decimal places. Pvalue = Determine whether to reject H0- the null hypothesis H0. Part 4 of 4 State a conclusion. There (Choose one) enough evidence to conclude that the proportion of high-altitude vehicles exceeding the standard differs from the proportion of low-altitude vehicles exceeding the standard.Cholesterol: An article in the Archives ofIntemal Medicine reported that in a sample of 245 men, 70 had elevated total cholesterol levels (more than 200 milligrams per deciliter). In a sample of 170 women, 62 had elevated cholesterol levels. Can 1,rou conclude that the proportion of men with elevated cholesterol levels is less than the proportion of women with elevated cholesterol levels? Let p] denote the proportion of men with elevated cholesterol levels and p2 denote the proportion of women with elevated cholesterol levels. Use the 11: 0.05 level of signicance and the Pvalue method with the TI84 Plus calculator. State the null and alternate hypotheses. H1: p1 p2