z test on RMarkdown

[purple]

hi im trying to do a z test on R but not getting any value for z. may i pls be guided to it? thank you!

[williaml]

Can you post code, not a screenshot? This includes an example of the Babies dataset.

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…

[purple]

ok. these are variations i tried:

z.test(Babies, alternative="greater", mu=3.2627500, stdev=0.5423668)

z.test(Babies, alternative="less", mu=3.2627500, stdev=0.5423668)

z.test(Babies, alternative="two.sided", mu=3.2627500, stdev=0.5423668)

thank you!

[purple]

Babies dataset

LENGTH	HEAD	WEIGHT
47.00	32.00	2.73
48.00	35.50	3.13
49.00	36.00	3.41
53.00	41.70	3.39
53.00	35.00	3.43
49.00	33.00	3.03
50.00	36.00	3.99
50.00	34.50	3.14
49.00	32.00	3.08
58.00	37.00	4.38
58.50	36.50	3.75
53.00	35.50	3.22
57.00	35.50	4.30
47.50	32.50	2.22
49.00	33.00	3.07
45.50	32.50	2.50
50.00	35.00	3.48
51.00	34.50	2.98
47.00	35.50	2.83
47.50	36.00	3.18

[williaml]

Can you make that reproducible? You can post the output of dput(head(Babies)).

Can you also list the libraries you are using?

library(pastecs)
library(BSDA) # just guessing this one - but I don't think I am right.

Babies <- tibble::tribble(
  ~LENGTH, ~HEAD, ~WEIGHT,
       47,    32,    2.73,
       48,  35.5,    3.13,
       49,    36,    3.41,
       53,  41.7,    3.39,
       53,    35,    3.43,
       49,    33,    3.03,
       50,    36,    3.99,
       50,  34.5,    3.14,
       49,    32,    3.08,
       58,    37,    4.38,
     58.5,  36.5,    3.75,
       53,  35.5,    3.22,
       57,  35.5,     4.3,
     47.5,  32.5,    2.22,
       49,    33,    3.07,
     45.5,  32.5,     2.5,
       50,    35,    3.48,
       51,  34.5,    2.98,
       47,  35.5,    2.83,
     47.5,    36,    3.18
  )

Read the article.

[purple]

ok thank you. i figured it out already. thanks again!