A sample selected from a population gave a sample proportion equal to 0.60.

Q: Suppose you want to estimate the proportion of traditional college students on your campus who own…

A: Find z-critical value:

Q: A population with a mean of µ = 15 has 40 scores. What is X?

A:

Q: If you have a z-score of 4.00 and the body proportion is .99997 and the question is asking for the…

A: The z-score is given by 4.

Q: What is the standard error for the estimate of the difference in proportions in the male and female…

A:

Q: The province of Pangasinan has a population of 3,163,190. Calculate the sample size using Yamane's…

A:

Q: under the area under the normal curve between the mean and +2.

A: Given: Mean of standard normal distribution μ=0 Standard deviation of normal distribution  σ=1 Let X…

Q: A random sample of 324 residents of a community revealed that 30% were very satisfied withthe…

A: Given that, Critical values: By using the standard normal table of Z, the critical value for two…

Q: What is the formula for t RATIO FOR TWO POPULATION MEANS (TWO INDEPENDENT SAMPLES)?

A: To compare population means of two independent samples t-test is used. The null hypothesis is: The…

Q: Based on the sample, predict the number of adults in Palm City whose main source of news is…

A: In sample, number of adults whose main source of news is newspaper, X = 54 Sample size n =…

Q: What is expression for t RATIO FOR TWO POPULATION MEANS (TWO RELATED SAMPLES)?

A:

Q: On a reading examination given to 900 students, Elaine’s score of 602 was higher than the scores of…

A: Solution

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

A:

Q: A survey of 100 fatal accidents showed that in 43 cases the driver at fault was inadequately…

A: We have given that , A survey of 100 fatal accidents showed that in 43 cases the driver at fault was…

Q: A sample of n = 5 scores has a mean of X-bar = 9. What is ∑X for this sample?

A: From the provided information, Sample size (n) = 5 Mean (x̅) = 9

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A:

Q: estimate the sample size

A: An estimate of sample size: The appropriate sample size for estimating the mean of a variable from…

Q: A survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone. Determine a…

A: Given that, In a survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone.

Q: 3. Suppose that you randomly picked 100 iPhones and calculated the average battery life for these…

A: The objective is to guess the average battery life of 100 iPhones.

Q: A matched-subjects experiment produced at statistic with a df of 13. How many subjects participated…

A:

Q: A sample with a mean of  8 has ∑ x = 72. How many scores are in the sample?

A:

Q: What does the test of a single proportion entail?

A: The One-Sample Proportion Test is used to assess whether a population proportion (P1) is…

Q: The workers at drug factory took a random sample of 800 drug tablets and found that 40 of them were…

A:

Q: What percentage ) What percentage of the people do not smoke? of the people do not exercise…

A: The data is given by   Smoke Do not smoke Total Exercise regularly 4 21 25 Do not exercise…

Q: The theater owner wants to sample 250 customers out of the 3500 in attendance. This will be a 1 in k…

A: Population is the set of all objects of interest. Sample is s subset of the population. It is not…

Q: What is formula for t RATIO FOR A SINGLE POPULATION MEAN?

A:

Q: The coefficient of variation for the systolic measurements is ___ %? The coefficient of variation…

A: Solution: The systolic and Diastolic measurements for a group of 10 adults are given. The…

Q: When computing a 95% CI for a population mean, the ____ is used as the point estimate.

A: Given that  When computing a 95% CI for a population mean, the ____ is used as the point estimate.…

Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

A:

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Margin of Error- In the theory of probability and statistics, there is a inverse relation between…

Q: Why must the sum of all fs in a sample equal N?

A: Every datum in a sample is assigned to a category/class depending on its value. For a given dataset,…

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A: Obtain the sample size of a preliminary estimate for p with 0.40. The formula of sample size is,…

Q: A researcher reports an F-ratio with df = 3, 56 from an independent-measures research study.  How…

A: An F-ratio is determined using sum of square for between groups with degree of freedom of between…

Q: 2 Considering the 5800 enrollees in the College of Education, a researcher would like to make a…

A:

Q: How large a sample must she select if she desires to be 98% confident that the true mean is within 4…

A: HERE GIVEN , population standard deviation  = 6 ounces  confidence level = 98%  MOE  = 4

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

A:

Q: A coffee owner wanted to determine how much caffeine was in each cup of coffee being served. A…

A: Given information: The data represents the amount of caffeine present in each cup of coffee that is…

Q: In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164…

A:

Q: When estimating the population proportion, how large a sample is needed to be 95% confident that the…

A: Here  sample proportion = 42/120= 0.35

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

A:

Q: 2. On a placement examination, August scored lower than 1210 of 12,860 students who took the exam.…

A: Given information: On a placement examination, 12860 students appeared. Among these 12860 students,…

Q: Wildlife biologist inspects 153 deer taken by hunters and find 32 of them carrying Lyme disease…

A: According to the provided information, n=153x=32p=xn=32153=0.209

Q: With no preliminary estimate of the proportion known, how many young adults would you survey to…

A: It is given that margin of error (E) is 0.10 and the confidence level is 0.99.

Q: According to the Distribution of Z table, ______ % of area is above a Z value of 0.82?

A: The normal curve is very helpful to know the area is below, above and between a Z value. If we can…

Q: A sample size of _is needed.?

A: Here use formula of margin of error

Q: You would like to be 99.9 confident that your estimate is within 2% of the true population…

A:

Q: Suppose you want to investigate the proportion of households in Muscat governorate that have fire…

A: Given information: The investigator is specially interested to estimate the proportion of households…

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Need to find By how many times does the Sample size have to be increased to decrease the margin of…

Q: Suppose we changed the definition to the average number of dots after forty rolls. Would this…

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.