sangriaalpaca386Lv1in Statistics·18 Feb 2019In a certain liberal arts college with about 10,000 students, 56% are males. If two students from this college are selected at random, what is the probability that they are of the same gender?
rosejellyfish111Lv1in Statistics·17 Feb 2019Use the given minimum and maximum data entries, and the number of classes, to find the class width, the lower class limits, and the upper class limits. minimum=16maximum= 126classes = 8
rubyhare675Lv1in Statistics·14 Feb 2021A blood bank asserts that a person with type O blood and a negative Rh factor (Rh−) can donate blood to any person with any blood type. Their data show that 49% of people have type O blood and 19% of people have Rh− factor; 52% of people have type O or Rh− factor. Part (a) Find the probability that a person has both type O blood and the Rh− facto
salmonotter163Lv1in Statistics·17 Feb 2019a person is asked to shuffle a standard deck of cards, draw one card, look at it, and place is back into the deck. if this procedure is repeated, find the probability of drawing the ace of spades on the 5th draw.
ultramarinemosquito763Lv1in Statistics·15 Feb 2019Scores on an exam follow an approximately normal distribution with a mean of 76.4 and a standard deviation of 6.1. What is the minimum score you would need to be in the top 7%?
tanmanatee28Lv1in Statistics·14 Feb 2019 A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is 15 . a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place.( , ) b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.( , ) c. What is the effect of a larger sample size on the interval estimate? Larger sample provides a - Select your answer - larger smaller Item 5 margin of error.
lavenderalligator777Lv1in Statistics·13 Feb 2021A headline read, “More than half of Americans Say Federal Taxes Too High.” The headline was based on a random sample of 1026 adult Americans in which 534 stated the amount of federal tax they have to pay is too high. a. State the null and alternative hypotheses. b. Check whether np0(1-p0) is greater or equal to 10. c. Manually calculate the test statistic. d. Find p-value.
burgundyhound873Lv1in Statistics·14 Feb 2021How do I calculate the frequency and proportion using R program?
burgundymule219Lv1in Statistics·14 Feb 2019Find the area in a standard Normal curve to the left of 1.02 by using the normal table
coralcod415Lv1in Statistics·15 Feb 2019Im not sure how to approahc a question like this, what are steps you could follow to solve this?
magentawildebeest913Lv1in Statistics·15 Feb 2019In a large class, there were 274 students who wrote both the midterm and the final exam. The standard deviation of the midterm grades was 13, and that of the final exam was 16. The correlation between the grades on the midterm and the final was 0.6. Based on the least squares regression line fitted to the data of the 274 students, if a student scored 19 points below the mean on the midterm, then how many points below the mean on the final would you predict her final exam grade to be? The predicted final exam grade is below the mean on the final. (Round your answer to one decimal place, but do not round in intermediate steps.)
OC userin Statistics·24 Nov 2018mo (5) A microbial population doubles in size every six days. How many days does it take to triple in size? (Your answer will be in terms of logarithms!) t/
OC userin Statistics·26 Nov 201821 2:11 + + 7. When does the system 2ac2 = 612 + ax3 = -8.02 + 4ax3 = 0 0 have a nontrivial solution? 0 A) When a = 0 or a = 2. B) For any real number a. C) When a=0. D) When a = 0 or a = -2.