What is the p value and 95 confidence intervals based on the picture?

Q: Identify the t -scores for a 90% confidence interval if the sample size is 25?

A: Givensample size(z)=25α=1-0.90=0.10α2=0.05

Q: í 600 people sampled, 348 had kids.

A: Given that  Sample size (n) = 600 Had kids (X) = 348   We know that  Best point estimate (p)= xn…

Q: 3. Confidence level : 99%, degree of freedom = 0, & = 0, s = 1 4. Confidence level : 99%, degree of…

A: Q4 Given that  99% confidence level  x=10 s=0.1 degrees of freedom=4 Q5 Given that  99% confidence…

Q: I want to estimate the population mean number of times people walk their dogs in a day In my…

A: Given information- Sample size, n = 5 Calculating sample mean and sample standard deviation using…

Q: Suppose we take a survey of 200 students and ask how much they study per week. The result is an…

A: From the above data  We are given that the  95% confidence interval is (10, 10.5). The population…

Q: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500…

A: The sample proportion of the sample of size n can be defined as:  Here, X = Total number of success…

Q: he confidence interval was (73, 83) What was the point estimate? What was the margin of error?

A: Given: Lower limit =73 Upper limit =83 The point estimate can be calculated as: Point estimate…

Q: The confidence interval was (36,45) What was the margin of error? What was the point estimate

A: Answer: From the given data, The confidence interval = (36,45)

Q: e confidence interval for a population mean is (240.53, 240.79). What are the sample mean and the…

A: The confidence interval for a population mean is (240.53, 240.79)WE HAVE TO FIND OUT THE MEAN AND…

Q: What is the upper bound of the confidence interval? A 98% confidence interval for the data: 25, 38,…

A: We have given data, X 25 38 62 45 61 38 21 42 31 35 The confidence level is 1-α=0.98.

Q: You are given the dataset representing the monthly salaries from a sample of thirty (30) Data…

A: Answer : sample x (x-x̄)^2 1 112276 337388320.9 2 108637 216947367.8 3 96818 8468875.824…

Q: x=111, n=194, Confidence level = 99%

A: The sample proportion of p is, p^=xn=111194=0.5722 Computation of critical value:…

Q: To construct a confidence interval, we have to make three assumptions. explain what are those…

A:

Q: You want to get a 95% confidence interval for the difference between the percentage of females with…

A:

Q: In general, when you increase the confidence level for a confidence interval using the same sample…

A: As confidence level increases critical value is going to increase .  Here they given sample…

Q: If n=160 and X = 128, construct a 90% confidence interval. Give your answers to three decimals  <…

A:

Q: For a confidence level of 99% with a sample size of 22, find the t-score. Did not see how to work…

A: The provided information is:

Q: What are confidence intervals?

A:

Q: Explain how to find the 95% confidence interval for the mean by hand using the following data set…

A: For the given sample, x¯=59.05, from the excel function, =AVERAGE(J2:J21)s=4.6394, from the excel…

Q: What do Confidence intervals tell us

A: Confidence interval

Q: What happens to the spread of an interval if you increase the confidence level from 90% to 99%?

A:

Q: I need help with creating a confidence interval using gender as a healthcare variable

A: Here, we can can use the sample proportions relating to a particular gender type to find the effect…

Q: A researcher surveyed 80 randomly selected Certified Public Accountants in each of the cities in…

A: The 2*4 contingency table is given. There are two categorical variables are Free Work and Cities. We…

Q: Suppose we take a survey of 400 students and ask how much they study per week. The result is an…

A: The 100 (1 – α)% confidence interval provides an interval estimation of the required population…

Q: 980 adults to learn about their gym membership. The results showed that 574 of the respondents lack…

A: The random variable X follows normal distribution. We have to construct 95% confidence interval for…

Q: the difference P-P2 when x 40, n, = 80, x, = 20, and n, nce in 60. Round the answer to at least…

A: Given : n1 = 80 x1 = 40 n2 = 60 x2 = 20 confidence level,c=0.8

Q: Here are some ratings on a scale of 1-10. Use confidence interval of 99% confidence. What is the…

A: Given data, 8, 7, 3, 10, 4, 4, 8, 8, 7, 8, 3, 8 n=12 Sample mean and sd is x=6.5 s=2.35

Q: What happens to the width of a confidence interval as the significance level, a, decreases?

A: There is two things Significance level: which is the prefixed probability of type I error before any…

Q: List below are the speeds (mi/h) measured from the southbound traffic on I-280, the speed limit is…

A: Given data is62,61,61,57,61,54,59,58,59,69,60,67

Q: Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What…

A: Given: Mean = 2.8 Median = 3.2

Q: please answer these all questions

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

Q: What is the difference between confidence interval for proportion and confidence interval for mean

A: Confidence interval: Point estimation provide a single value and nothing can be said about the…

Q: Why are confidence intervals important and what do they mean to a study?

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…