Question

#2

sample means, and find the mean of this distribution of sample means How does it compare to the mean of the population? Exercise 2. The distribution of walking times for babies has a mean of μ-14 months and a standard deviation of σ-3 months. What is the distribution of sample means for samples of size n = 36? Exercise 3. For the problem considered in section 8.3, assume we got M15. What is the s-score, and do we eject or fail to reject Ho at the level of a = 0.05 Exercise 4. For the problem considered in section 8.3, now assume that our sample size was n-4 but we obtained the same sample mean M = 12, Using the -test, do ue reject or fail to reject Ho at the level of α = 0.05? If we commit an error, what kind of emor have we commited?

Answer 1

Xe-Sample centrral dit Jheetem JSC ( X-14) ~ N(0,1) 3 ว่า 飞= 1% ( 15-14) 3 うーー3-score- 3

score C=a).-da 24eata..than the, -critical value at- ks0.05 Suppose n=4 M.-12 12-14) 3 ー -1、33 005 We fail to rest 1h. the iLa and 196 Se nwe reject Henca wie

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