Sample proportion is 18%. Population proportion is 13%. Sample Size is 400. Calculated value of test statistic Z is a. -2.97 b. 2.97 c. 4.97 d. -4.97

Q: island has 12 fur seal rookies(breeding places). To estimate the fur seal pup population in Rookery…

A:

Q: legally purchase alcohol in the State of Oregon (students who are 21 or over). If we want the margin…

A: Given that  Margin of error =E =5% =0.05 90% confidence interval.  NOTE:- According to bartleby…

Q: Abel Alonzo, Director of Human Resources, is exploring employee absenteeism at the Harrison Haulers…

A: Proportionate stratified sampling.

Q: How do they compare? O The average endotoxin concentration in farm homes is more than double the…

A: The mean is calculated as          x¯=1n∑i=1nxiThe median is the middle value after the values or…

Q: From the sample statistics, find the value of p1 - p2, the point estimate of the difference of the…

A:

Q: The ff. are the heights of students in centimeter. 110cm, 115 cm, 125 cm, 13 cm. Suppose samples of…

A: If a repeated sample of same size is drawn from the population and sample mean is calculated for…

Q: f the population mean is 12.45 what is the mean of the sampling distribution of its mean

A: Given data,  population mean is 12.45

Q: Running heart rate - Jose is a physician who is researching to what extent running affects heart…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: When you have means from two different samples, it is best to conduct? a. one sample t-test b.…

A: The correct option is, b. independent samples t-test. Explanation:One sample t-test is used to test…

Q: Hi I need help answering these questions for normal distribution, thank you.

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: Thirty-seven percent of all Americans drink bottled water more than once a week (Natural resources…

A: Suppose you select a sample of 190 st: It is given that the people 37% and the sample size n is 190.…

Q: true proportion of voters in favor of a referendum is unknown period a random sample of 200 voters…

A: Formula : Point estimate = p̂= x/n

Q: A researcher wishes to estimate the proportion of all adults who own a cell phone. He takes a random…

A: Given data, Sample n=2000 Who owns cell phone x=1650 Population of interest p=?

Q: A researcher would like to determine the proportion of cities that has a semiautomated waste…

A: Obtain the sample size of a no preliminary estimate for p.   The formula of sample size is, Use…

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: In a 70-item test, Ronnel got a score of 50 which is in the third quartile. This means that:   A. He…

A:

Q: Let x be the average number of employees in a group health insurance plan, and let y be the average…

A:

Q: 14 The standard error of the sample proportion is, a 0.0243         b 0.0233         c 0.0224…

A: Standard error explain the spread of the data from the population parameter. Standard error is the…

Q: From the sample statistics, find the value of p1 - p2, the point estimate of the difference of the…

A: From the provided information,

Q: Outline the four steps that allow us to use sample data to answer questions about an unknown…

A: Four steps of hypothesis testing: Step 1: create a null and alternate hypothesis. For all…

Q: A sample of 50 people are selected at random from a population and it is found that 12 people in…

A: Given a sample of 50 people are selected at random from a population and it is found that 12 people…

Q: Brenda is calculating a two-sample t-statistic.  What value should she plug in for se?   Group of…

A: It is given that Brenda is calculating a two-sample t-statistic.

Q: A company gives the percentage of defective products as 6% or less. Use the sample below to…

A: Given: p0=0.06n=50x=5 The significance level is taken as 0.05.

Q: An apple orchard's workers pick 12,500 apples in the month of October. A sample of 300 of these…

A: To find: The best estimate of the percent of apples picked at the orchard in October that are…

Q: Thirty-two percent of all Americans drink bottled water more than once a week (Natural resources…

A: Obtain the probability that the sample proportion will be within 0.02 of the population proportion…

Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…

A: Givenx=19n=308p^=19308=0.0617α=0.05

Q: Running heart rate - Jose is a physician who is researching to what extent running affects heart…

A: In this case, the claim to be tested: "The percentage of individuals with age between 18 and 25…

Q: PLEASE make sure that your answer is right.  You are a Quality Control Engineer. You sample 4…

A: n=sample size=4, sample mean x̄=230  Population standard deviations σ=5

Q: A researcher is interested in the relationship between socioeconomic status (SES) and rates of…

A: Please see below

Q: .Taggart Vanetten ran the Marathon in 151 minutes what is his percentile ?what does it mean in the…

A: Given, Data is provided in this table: Sum of minutes in data: 7196 Total no. of values : 40

Q: The FDA conducted a study to determine whether corn in a certain region contained unhealthy levels…

A: Given, sample size n=23 The table below shows the required calculation- Pesticide level (x) x-x2…

Q: (a) Find (the mean of the sampling distribution of the sample proportion). HA =0 (the standard…

A: Given : Population proportion of the winning scratchers , p = 0.45 Sample size , n = 8 p^ represents…

Q: A population consist of numbers 3,6,9,12, and 20 and the sample size n=3 (apply the 8 steps ,upload…

A: Population Numbers are 3 6 9 12 20 From the given population samples are prepared with size 3…

Q: Heights of 20-year-old men vary approximately according to a normal distribution with μ=176.9 cm and…

A: From the provided information, Height of 20-year-old men vary approximately normal with mean (µ) =…

Q: Explain with example t Test for Two Population Means: Independent Samples (EPO Experiment).

A: Two samples are said to be independent if the sample values selected from one population are not…

Q: 4. The proportion of senior male students’ height is significantly higher than that of senior female…

A: Since we know that  One talied test is a test in which area of the distribution in only one side i.e…

Q: Never Married People The percentage of males 18 years and older who have never married is 30.4. For…

A: Let p1: Proportion of men Let p2: Proportion of women Population proportion of men=P1=0.304…

Q: Talk about situations in which we use independent samples t-test vs. paired samples t-test?

A: Our aim is to find when we use  independent samples t-test and  paired samples t-test.

Q: B. Below is the number of students taking up statistics from each department. A seminar will be…

A: 1] p=50%=0.5 2] margin of error=E=0.03

Q: Thirty-five percent of all Americans drink bottled water more than once a week (Natural resources…

A: Assume,  p^ denotes the sample proportion of people who drink bottled water more than once a week.…

Q: Never Married People The percentage of males  18  years and older who have never married is  30.4…

A: From the provided information, For Men: p1=0.304n1=250x1=73 For Women: p2=0.236n2=200x2=50 The level…

Q: In the example from lecture concerning making community service a requirement, suppose the…

A: Given that  Sample sizes n1 =360 , n2=400 Favorable cases x1=180 , x2=168

Q: A sample of 1000 observations taken from population-1 gave x, =290 . Another 1 sample of size 1200…

A: We have given that,  For population:- 1 N1 = 1000, X1= 290, For population:- 2 N2 = 1200, X2 = 396…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month.…

A: Givensample size = 563 tankers number of ships did not have spills = 445  number of ships have…

Q: A controversial bill is being debated in the state legislature. Representative Williams wants to…

A: We have, ME = z critical * Sqrt[ p1*(1-p1)/n1 + p2*(1-p2)/n]

Q: A population has u=100 σ=20. If you select a single score from this population, on the average, how…

A: Given that u=100 σ=20.  Empirical Rule: The percentage of values lies between one standard…

Q: :The coefficient of skewness by Karl Pearson and Professor Bowley are considered as Relative…

A: Explanation: The coefficient of skewness: Skewness gives an idea about the shape of the curve.…