PrasheWhy is it necessary to check that np 25 and ng 2 5?es (foO A. It is necessary to check that np 25 and ng 2 5 because, if either of the values are less than 5, the distribution may not be normally distributed, thus z, cannotbe used to calculate the confidence interval.gnmeB.debocO B. It is necessary to check that np 25 and ng 25 because the confidence intervals estimating the population proportions will overlap if these values are less than5.eailOC. It is necessary to check that np 25 and ng 2 5 to be certain that the minimum value of the sample size, n, is met.O D. It is necessary to check that np 25 and ng 2 5 because, if either of the values are less than 5, the tails on either side of the left and right endpoints are notaccounted for.extccessibleesourcepols forMultimedClick to select your answer.MacBook Airへ%23237.ERYFGKAくCVNM.commandoptcommand

We know that It is necessary to check that np≥5 and nq≥5because, if either of the values are less…

Why is it necessary to check that np 2 5 and nq 2 5? O A. It is necessary to check that np 2 5 and nq 2 5 because, if either of the values are less than 5, the distribution may not be normally distributed, thus z, cannot be used to calculate the confidence interval. OB. It is necessary to check that np 25 and nq 25 because the confidence intervals estimating the population proportions will overlap if these values are less than 5. OC. It is necessary to check that np 2 5 and ng 2 5 to be certain that the minimum value of the sample size, n, is met. OD. It is necessary to check that np 2 5 and ng 2 5 because, if either of the values are less than 5, the tails on either side of the left and right endpoints are not accounted for. or

Why is it necessary to check that np 2 5 and nq 2 5? O A. It is necessary to check that np 2 5 and nq 2 5 because, if either of the values are less than 5, the distribution may not be normally distributed, thus z, cannot be used to calculate the confidence interval. OB. It is necessary to check that np 25 and nq 25 because the confidence intervals estimating the population proportions will overlap if these values are less than 5. OC. It is necessary to check that np 2 5 and ng 2 5 to be certain that the minimum value of the sample size, n, is met. OD. It is necessary to check that np 2 5 and ng 2 5 because, if either of the values are less than 5, the tails on either side of the left and right endpoints are not accounted for. or

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

3. Assume that the distribution of the length X of male spider is N(ux,o}) and the length Y of female spiders is N(µy,o?), and X and Y are independent. Construct approximated 95% one-sided confidence intervals for o? /o? when n = m = 30, and = 0.4399 and S? = 1.4100.
5. Let p,= random sample from electrical engineering and p2=random sample from civil engineering students. 80 40 The point estimate of p, is pi= and for p2 is p2= with 90% confidence interval. Find 250 175 the interval between difference of two proportions.
Suppose that as a result of a validation study the confidence interval is calculated between A and B (B>A). Under what condition it cannot be said that the model is valid? O a. A<B O b. B>0 Ос. А>,0 O d. A<0 O e. -2A=B
Let π denote some population proportion of interest and suppose a 99% confidence interval for π is calculated to be (0.60, 0.70). Also, suppose we want to test the hypotheses H0:π=0.74 and HA:π≠0.74 . What can you say about the corresponding p-value? The corresponding p-value will be smaller than 0.01. The corresponding p-value will be smaller than 0.05 but larger than 0.01. The corresponding p-value will be larger than 0.05. I can't say anything about the corresponding p-value until I run the test.
Sal knows that parties of people on average spend 75 minutes at their restaurant. They wonder if this average is significantly different on the weekends. They found the average time spent by the 30 parties which dined there this weekend was 82 minutes with a SD of 17 minutes. Assume an alpha of .05. The lower end of the 95% confidence interval is and the higher end of the 95% confidence interval is.
Here are summary statistics for randomly selected weights of newborn girls: nequals 235 , x overbar equals32.8 hg, sequals 7.9 hg. Construct a confidence interval estimate of the mean. Use a 99 % confidence level. Are these results very different from the confidence interval 29.7 hgless than muless than35.3 hg with only 15 sample values, x overbar equals32.5 hg, and sequals 3.6 hg? What is the confidence interval for the population mean mu ? nothing hgless than muless thannothing hg (Round to one decimal place as needed.) Are the results between the two confidence intervals very different? A. No, because each confidence interval contains the mean of the other confidence interval. B. Yes, because one confidence interval does not contain the mean of the other confidence interval. C. No, because the confidence interval limits are similar. D. Yes, because the confidence interval limits are not…
If a sample of 35 employees had been selected, could we find a 95% confidence interval for the average salary of the entire company? O Yes because when I plug 35 into the calculator with the previous average of $55,000 and standard deviation of $5,000 I get a confidence interval of ($53,343.53, $56,656.47) No since 35 is less than 40.
Based on a random sample of 100 students at Community College in 95% confidence interval for U the mean age of all students at Community College is 21.2 years to 26.6 years ( 21.2<u<26.6). On the basis of this information decide whether you agree or disagree with each of the following statements explain how you decide. A. According to the confidence interval the mean age of all students at Community College cannot possibly be 23.1 years. B. The 99% confidence interval based on the sample taken above will give a smaller margin of error in the estimate of u. C. If the sample sizes decrease 240 the 95% confidence interval has a larger margin of error than the one obtained above
Q7. The 95% C.I. is calculated as 95% C.I.= X ± 1.96 and the п 99% C.I. is calculated as 99% C.I.= X ± 2.57 How will happen the Confidence Interval change when it is increased from 95% to 99% using the same sample. A. Widens with the same centre. B. Narrows with different centres. C. Same range with different centres. D. Widens with different centres. О А. А ОВ. В С. С O D. D
15. Construct the confidence interval for the population mean μ. c = 0.90, X = 9.1, a = 0.2, and n = 58 A 90% confidence interval for u is S (Round to two decimal places as needed.)
From chapter 14, review activity #19. A recent survey of 200 households showed that 8 had a single male as the head of the household. Forty years ago, a survey of 200 households showed that 6 had a single male as the head of the household. Car it be concluded that the proportion has changed, based on a 95% confidence interval? Recall the confidence interval is calculated as (-0.0261, 0.0461) A) Yes, the proportion changed since 0 is in the interval. B) Yes, the proportion changed since O is NOT in the interval. C) No, the proportion did not change since 0 is in the interval. D) No, the proportion did not change since 0 is NOT in the interval. E) We cannot determine the conclusion from the confidence interval