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Statistics Questions
Statistics Questions
P(73
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient
Suppose a teacher recorded the attendance of her students in a recent statistics class because she wanted to investigate the linear relationship between the number of classes a nest and their final grades the company table shows these data for random stud
Male baby probability
Problem 1 In 2012, 71% of student graduating from a four-year college had student loan debt. 1. We randomly sample college graduates from four-year universities an determined the proportion in the sample with student loans. For which of the following sa
In 2011, the national percent of low-income working families had an approximately normal distribution with a mean of 31.3% and a standard deviation of 6.2% (The Working Poor Families Project, 2011). . .
What is the correlation coefficient r?
Computer output for fitting a simple linear model is given below. State the value of the sample slope for this model and give the null and alternative hypotheses for testing if the slope in the population is different from zero. Identify the p-value and u
Statistics
Assume that a simple random sample has been selected and test the given claim. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. Listed below are brain volumes in cm3
Hoekema et al. (A-3) studied craniofacial morphology of patients diagnosed with obstructive sleep apnea syndrome (OSAS) in healthy male subjects. One of the demographic variables the researchers collected for all subjects was the Body Mass Index (BMI, cal
The probability that the sample proportion surviving for at least 3 years will be less than71 % is?(Round to four decimal places as needed.)
scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 11. use the emperical rule to determine the following. what percentage of people has an IQ score less than 67 and greater than 133
probability and statistics
probability and statistics
STAT
Find the area of the shaded region. The graph depicts the standard normal distribution with mean 0 and standard deviation 1
How does changing the sample size affect confidence intervals? Explain
Two of the questions asked in the survey of customers are shown below.
If the null hypothesis is not rejected here, what is the answer then?
Which of the following statements is true?
Help needed: Probability of polar bears
Statistics question
Probability question
NHTSA crash tests.
Please Type your answer: In 2018, the average water consumption per capita in Inland X for the year was 93.5 gallons. Assume that the water consumption per capita in Inland X follows a normal and symmetrical distribution with a mean of 93.5 gallons and a
Travelocity would like to test if the average roundtrip airfare between New York and London is less than $1,400. A random sample of 30 flights between New York and London was selected and the airfare was recorded. Assume that the standard deviation for th
Entertainment Software Association would like to test if the average age of "gamers" (those that routinely play video games) is more than 30 years old. A random sample of 33 gamers was selected and their ages were recorded. Assume that the standard deviat
A golfer claims that his average golf score at the course he plays regularly is less than 90. A random sample of 35 rounds of golf was selected and the scores were recorded. Assume that the standard deviation for the population of scores for this golfer i
Fill Rate???
Coefficient of variation,A sample of blood pressure measurements is taken for a group of adults, and those values (mm Hg) are listed below. The values are matched so that 10 10
Coefficients of variation
The probability that an individual is left-handed is 0.190 . In a class of 34students, what is the probability of finding five left-handers? Round the answer to the nearest thousandth
On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of 120 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual.
According to Nielsen Media Research, the average number of hours of TV viewing per household per week in the United States is 50.4 hours. Suppose the standard deviation is 11.8 hours and a random sample of 42 U.S. households is taken. A. What is the prob
The mean and the standard deviation of the sample of 100 bank customer waiting times are x¯ = 5.14 and s = 2.321. Calculate a t-based 95 percent confidence interval for µ, the mean of all possible bank customer waiting times using the new system. Are we 9
In an article in Accounting and Business Research, Carslaw and Kaplan investigate factors that influence “audit delay” for firms in New Zealand. Audit delay, which is defined to be the length of time (in days) from a company’s financial year-end to the da
estimating means
how to find the Z score when X is not present
Statistics
Tumor counts: A cancer laboratory is estimating the rate of tumorigenesis in two strains of mice, A and B. They have tumor count data for 10 mice in strain A and 13 mice in strain B. Type A mice have been well studied, and information from other laborator
Tumor counts: A caTumor counts: A cancer laboratory is estimating the rate of tumorigenesis in two strains of mice, A and B. They have tumor count data for 10 mice in strain A and 13 mice in strain B. Type A mice have been well studied, and information fr
Probability
vanishing games
What decision should he make according to the maximax decision rule?
A random sample of size n = 85 is taken from a finite population of size N = 479 with mean μ = 253 and variance σ2 = 436. [You may find it useful to reference the z table.] a-1. Is it necessary to apply the finite population correction factor? Yes No
TLC
unbiased estimator
Advanced Business Statistics
The following table contains information on matched sample values whose differences are normally distributed. (You may find it useful to reference the appropriate table: z table or t table)
Statistic Question
FIND THE P VALUE
Statistics Regression
Probability & Statistics Question
Given 11 different integers from 1 to 20. Prove that at least two of them are exactly 5 apart. pigeonhole principle.
Engineers must consider the diameters of heads when designing helmets.
Assume a binomial probability distribution has p = 0.70 and n = 400.
A sleep researcher hypothesizes that sleep is related to feelings of tiredness. Below are partial SPSS results with an α of 0.05 of the analysis for a sample of participants at a sleep center.
Overproduction of uric acid in the body
An agricultural experiment designed to assess differences in yields of corn for four different varieties, using three different fertilizers, produced the results (in tonnes per acre) shown in the following table.
The Zagat Restaurant Survey provides food, decor, and service ratings for some of the top restaurants across the United States. For 27 restaurants located in a certain city, the average price of a dinner, including one drink and tip, was $48.60. You are l
Consider a binomial experiment with n = 20 and p = 0.80. (Round your answers to four decimal places.)
The University Secretary wants to determine how University grade point average, GPA (highest being 4.0) of a sample of students
Chi squad
Please solve question 2
Hypothesis testing
statistics
HELP PLEASE DUE ASAP
Attendance and grades
Health Improvement Program for Employees
The first sample mean distribution is based on samples of size n=100 and the second is based on sample of size n=225. Which sample mean distribution has the smaller standard error? Why?
How do you find the quartiles of a box and whisker plot?
Statistics
Class Widthe
the annual per capita consumption of ice cream (in pounds) in the united states can be approximated by the normal distribution, as shown in the figure to the right.
Aggregate Planning
a. If the Pearson’s correlation of likeability and numbers of movements replicated is r = +.25 is there enough evidence to conclude that the greater the number to mirrored moves the greater the likelihood that you will like the person? Use α = .05, two-t
Explain the formation of the distribution curve (Frequency Distribution and Histogram) by adding the Tolerance and Control Limits.
The wedding date for a couple is quickly approaching, and the wedding planner must provide the caterer an estimate of how many people will attend the reception so that the appropriate quantity of foo...
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