Sample standard Number of giraffes Sample mean deviation Take Sample Enter the values of the sample size, the point estimate of the mean, the sample standard deviation, and the critical value you need for your 95% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute". Sample size: Point estimate: Standard error: 5 Sample standard deviation: Critical values Margin of error: 0.005 = 2.947 Critical value: 10.010 = 2.602 95% confidence interval: 10.025 = 2.131 Compute 0.050 1.753 0.100=1.341 (b) Based on your sample, graph the 95% confidence interval for the population mean of all the heights of fully grown male West African giraffes. • Enter the values for the lower and upper limits on the graph to show your confidence interval.

Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A biologist reports a confidence interval of (3.9,5.5) when estimating the mean height​ (in centimeters) of a sample of seedlings.       Question content area bottom Part 1 The estimated margin of error is enter your response here   .

A sample​ mean, sample​ size, population standard​ deviation, and confidence level are provided. Use this information to complete parts​ (a) through​ (c) below.   x=35​, n=27​, σ=5 confidence level=90​%   a. Use the​ one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.   The confidence interval is from _______ to _________. ​(Type integers or decimals rounded to one decimal place as​ needed.)   b. Obtain the margin of error by taking half the length of the confidence interval.   What is the length of the confidence​ interval?   ____________ ​(Type an integer or decimal rounded to one decimal place as​ needed.)   c. Obtain the margin of error by using the formula E=zα2•σn.   Identify the critical value. zα2=____________ ​(Type an integer or decimal rounded to two decimal places as​ needed.)   What is the margin of error obtained using the methods of parts​ (b) and​(c)? _________ ​(Type an integer or decimal…

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Constructing Confidence Intervals you are given the sample mean and the population standard deviation. Use this information to construct 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. Q. Stock Prices From a random sample of 36 business days during the year 2020, the mean closing price of Apple stock was $97.17. Assume the population standard deviation is $21.77. (Source: Nasdaq)

Sample size n=25, a normal distribution with a mean of u=100. Standard divination=25   find the range of sample means what defines the middle 95% of the distribution of sample means   and find the range of sample means that defines the middle 99% of the distribution of sample means