It has been reported that 20.4% of incoming freshmen indicate that they will major in business or a related field.  A random sample of 400 incoming college freshmen was asked their preference, and 95 replied that they were considering business as a major.  Estimate the true proportion of freshman business majors with 98% confidence.  Does your interval contain 20.4?

Q: esearch scientist wishes to test the claim that the mean number of units taken by community college…

A: From the given information, We see that no information about the normality of the population is…

Q: A disease has a prevalence of 11%. A diagnosis has 85% probability of correctly identifying the…

A: Let D=The Person has the disease. Dc=The person doesn't have the disease. P=The person is tested…

Q: find the z-number associated with a 92% level of confidence. find the z-number associated with a…

A:

Q: Use the confidence interval to find the margin of error and the sample mean. (.228, 0.390)

A: We know that the Margin of error = (upper_limit - lower_imit )/2 and Sample mean = (upper limit +…

Q: In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length…

A: We have to find confidence Iinterval

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: Suppose the null hypothesis is not rejected. State the conclusion based on the results of the test.…

A: Test is that whether the mean proce has increased.

Q: A researcher is interested to find out the proportion of registered nurses in Manitoba who are more…

A: Given that the sample of 89 from the records of members of Manitoba Nursing Association and she…

Q: cognitive psychologist has recently developed a test to measure the emotional intelligence of…

A: Given,mean(μ)=95standard deviation(σ)=10

Q: Dr. Smith is investigating whether squeezing a stress ball throughout the day improves job…

A: μ=45, n=100, x̄=50,

Q: Suppose there are 5 students in a room. The mean age is 20.0 years, and the median age is 19. If the…

A: From the provided information, There are 5 students in a room. The mean age is 20.0 Years. The…

Q: Suppose a professor wants to know if students in her statistics class have a good grasp of basic…

A: Given: Sample size n=6 Sample mean x¯=∑i=1nXin=62+92+75+68+83+956=79.167 Sample standard deviation…

Q: In 2009, it was estimated that 63% of Americans supported the death penalty. In 2014, a Rasmussen…

A: sample size(n)=943 No. of Americans supported the death penalty(x)=536 population proportion=0.63

Q: Suppose there are 30 students in a class. the18 male students in the class have a mean score of 72,…

A:

Q: A survey was conducted that asked 984 people how many books they had read in the past year. Results…

A: Sample size is, Sample mean is, Sample standard deviation is, Confidence level is The objective is…

Q: Which one of the following is the correct way to report the results of a t test? The mean math-test…

A: Given Information:  The mean math-test score for the 12th grade students (M = 82.7, SD = 4.9)   The…

Q: Determine the probability of seeing a Z score of -5.28 or one with a larger absolute value.

A: Z = -5.28 P( Z > -5.28) = 1 – P(Z < -5.28) = 1 – 0 = 1 P(Z < -5.28) = 0 (From Excel…

Q: Use the five-step procedure to test the research hypothesis that the mean weight in men in the…

A: H0 : ? =191 H1 : ? >191

Q: Nabisco claims that Chip Ahoy Cookies have an x ̅=28.67 chocolate chips per cookie with a SD=2.67.…

A: The formula for calculating standard error is  SE = σ/√n

Q: A confidence interval for the population mean was constructed and found to be (34.6, 66.6). What is…

A: The estimated statistic from the samples, which is assumed to be representative of the population…

Q: Suppose the null hypothesis is rejected. State the conclusion based on the results of the test.…

A: According to the provided data, it is supposed that the null hypothesis is rejected. The null and…

Q: Convert the estimate and your confidence interval to Percents. Discuss reasons the estimate might be…

A: We have to convert the estimate and confidence interval into the percentage.

Q: A survey was conducted that asked 1005 people how many books they had read in the past year. Results…

A: Given,sample meaan(x¯)=14.3sample standard deviation(s)=16.6sample size(n)=1005degrees of…

Q: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the median be…

A: Solution-: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the…

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: According to a polling organization, 24% of adults in a large region consider themselves to be…

A: The hypothesized proportion is 0.24.

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: Suppose that the mean score of a class of 34 students was 78. The 19 male students in the class had…

A: Basic formulas for mean has applied.

Q: Suppose there are 5 students in a room. The mean age is 20.0 years, and the median age is 19. If the…

A: When the observations are 5 the mean and median of the data set areMean = 20.0 years Median= 19…

Q: A survey was conducted that asked 972 people how many books they had read in the past year. Results…

A: From the provided information, Sample size (n) = 972 Sample mean (x̅) = 14.1 Standard deviation (s)…

Q: A golf pro claims that his mean golf score is 63. A sportswriter wants to test the claim that his…

A: A golf pro claims that his mean golf score is 63. A sportswriter wants to test the claim that his…

Q: Suppose that the mean score of a class of 35 students was 74. The 18 male students in the class had…

A:

Q: Mean Score for Female Students =

A:

Q: Suppose that the mean score of a class of 28 students was 77. The 16 male students in the class had…

A: The mean score of the 28 students was 77. This means that on an average each student scored a total…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.