Which is a condition that must be met before using a Normal model for a sampling distribution of proportions? We must expect more than 10 successes and more than 10 failures. The samples were chosen to give the best data. O The outcomes within each sample are not independent.

Q: 1.A distribution of sample means with scores of 35 were taken from a skewed population.  The…

A: 1) We know that if the distribution of the population is skewed then the distribution of sample…

Q: you have data on smoking status in males (n= 20) and females (n= 15 and want to see if males smoke…

A: We have to determine which statement is true for given situation.Sample sizes n1=20 ,n2=15

Q: Suppose you select a random sample of N=81, and find X = 50, and s = 9.9. Determine the 99%…

A: Given Mean=50 Standard deviations=9.9 n=81

Q: With a sample size n=250. Use the pooled data to test whether the distribution of the percent wound…

A: The hypotheses used for testing the goodness of fit are, H0: The data follows normal distribution.…

Q: find the margin of error for a sample mean, given n=16, s=4, Xbar=17. for a 95% confidence interval.

A: The margin of error for sample mean is given by,

Q: Determine and o from the given parameters of the population and sample size. p= 87, o = 13, n= 35 口

A: The mean of the sampling distribution of the sample mean is given by:

Q: You assume equal variances in a two-sample t-test. n1 = 12 and d.f. = 18. What is n2?

A: It is given that n1 =12 and df =18.

Q: Determine the sample size for a on-line survey with a variability of 30% and a 95% confidence…

A: Sample size n=z2(p*q)/e2

Q: Determine the minimum sample size needed if we want to estimate the population percent of students…

A:

Q: If a researcher were to increase a sample size from n = 30 participants to n = 80 participants, what…

A: Increase power

Q: For the population of college students, the number of hours spent studying per week is normally…

A: We have to find out if there is possibility of type 2error.

Q: When comparing two independent samples with continuous outcomes, an investigator would compare the…

A: Given problem Given that   When comparing two independent samples with continuous outcomes, an…

Q: The number of successes and the sample size are given for a simple random sample from a population.…

A: Obtain the value of sample proportion. The value of sample proportion is obtained below: From the…

Q: When finding the t-value, how many degrees of freedom do we have from a sample size of n=10?

A: Degrees of freedom = n-1

Q: When using the student's t distribution to test what value do you use for the degrees of freedom if…

A: It is given that the sample size is n = 32.

Q: residents who subscribe to Sporting News. A random sample of  n1 = 88  urban residents showed that…

A: According to guidelines we solve first three subparts  when given multiple subparts.

Q: In each situation, find the value of the t-statistic for the sample mean x and give the value of…

A: The objective of this question is to calculate the t-statistic and the degrees of freedom for two…

Q: In lecture, we analyzed the simulated results of rolling five normal dice a total of 1,000 times. We…

A: Introduction: For a discrete random variable X, taking values X = x with probability mass function…

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: Katy and Bonnie decide to buy some Krispy kernel microwave popcorn they are completely bowled over…

A: Given: The sample data is as follows 3.9 2.8 3.4 4.1 3.3 Population mean μ=3.0 Sample…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: Are freshmen psychology majors more likely to change their major before they graduate compared to…

A: Given Information :   344 of the 618 freshmen psychology majors from a recent study changed their…

Q: Use the confidence interval to find the margin of error and the sample mean. (12, 20) O E = 4, X =…

A: confidence interval for mean : (12,20)

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Assume that a sample is used to estimate a population proportion p. To find the 95% confidence…

A:

Q: f n=300 and x=60, construct a 99% confidence interval estimate for the population proportion.

A: n=300 and x=60, construct a 99% confidence interval

Q: A certain population has a mean of 452 and a standard deviation of 36. Many samples of size 42 are…

A: Given Information: Mean μ=452 Standard deviation σ=36 Sample size (n) = 42. (a)  What value would…

Q: You want to survey students to see what proportion of them have taken Statistics 101. This survey…

A: Margin of error(M) = 4% = 0.04 Confidence interval = 95%

Q: What are the degrees of freedom for this test? d.f.= What is the p-value for this sample?

A: Introduction: Denote p1, p2, p3, p4, and p5 as the respective true proportions for selecting…

Q: What proportion of the distribution of sample means is greater than a z of -1

A: The standard normal variable Z follows normal distribution with mean 0 and standard deviation 1.

Q: When comparing two independent population means, if n1 = 13 and n2 = 10, degrees of freedom for the…

A: We have given that  n1 = 13,    n2 = 10  We know that the degrees of freedom for two independent…

Q: 1. Consider the golf ball example again using a completely randomized deign with a single factor…

A: We want to calculate  a) MST b) MSE c)  F Note: According to bartleby experts question answers…