Find the 0.95 confidence interval for μ

Consider a sampled population that is normally distributed, with the given information. (Give your answers correct to two decimal places.) n = 50, x bar = 77.9, and σ = 12.3

(a) Find the 0.95 confidence interval for μ. ____ to ____

(b) Are the assumptions satisfied? Explain. a) Yes, the sample size is large enough to apply the CLT. b) No, the sample size is not large enough to apply the CLT. c) not enough information

Also read:

Need these 2 questions answered. 150 words total 75 for each question. Files are attached. Need referenced if using other source materials including chapter pages and appendix table. Thank you Question 1) Keri is the owner of a new restaurant in the downtown area of her hometown. To continuously improve service, she would like to know if completed dishes are being delivered to the customer’s table within one minute of being completed by the chef. A random sample of 75 completed dishes showed that 60 were delivered within one minute of completion. Calculate the 90%, 95%, and 99% confidence interval for the true population proportion. Interpret your response within the context of the situation. Refer to Chapter 17, pp. 427-430 on calculating confidence intervals. Click here for Table A.2 from the appendix. Your response should be at least 75 words in length, unless otherwise specified. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations. Question 2) A random sample of 100 students attending a concert spent an average of $142 on their tickets with a standard deviation of $47.50. Calculate the 90%, 95%, and 99% confidence intervals for the mean amount of money spent by all students attending the concert. Interpret your response within the context of the situation. Refer to Chapter 17, pp. 427-430 on calculating confidence intervals. Click here for Table A.2 from the appendix. Your response should be at least 75 words in length, unless otherwise specified. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.
A. Construct the confidence interval for the population mean m?=0.98,
1. Construct the confidence interval for the population mean ?.C =0.90
CHAPTER 9 CONFIDENCE INTERVAL ESTIMATION
Construct a 90% confidence interval for the true proportion of checking account customers who also have savings accounts
Racism erodes confidence and self- worth in turn leading to
95% Confidnecen=61x=2.0 kgs=4.9kgQuestion: What is the confidence inte
Hypothesis Testing and Confidence Intervals