比较抽样与自助法的均值
为便于计算，上一练习得到的分布已放入 tibble 中。sampling_distribution 的 sample_mean 列包含 mean_popularity_2000_samp，bootstrap_distribution 的 resample_mean 列包含 mean_popularity_2000_boot。
spotify_population、spotify_sample、sampling_distribution 和 bootstrap_distribution 已可用；已加载 dplyr。
本练习是课程的一部分
R 中的抽样
交互式实操练习
通过完成这段示例代码来试试这个练习。
# Calculate the true population mean popularity
pop_mean <- ___
# Calculate the original sample mean popularity
samp_mean <- ___
# Calculate the sampling dist'n estimate of mean popularity
samp_distn_mean <- ___
# Calculate the bootstrap dist'n estimate of mean popularity
boot_distn_mean <- ___
# See the results
c(pop = pop_mean, samp = samp_mean, sam_distn = samp_distn_mean, boot_distn = boot_distn_mean)