Solution:
Sample average can be calculated as
=(52+47+30+37+44+56+35+26+39+39+26+28)/12
Average = 459/12 = 38.25
Solution(b)
Confidence interval can be calculated as
Xbar +/- zalpha/2 *S/sqrt(n)
38.25 +/- 1.65*9.67/sqrt(12)
38.25 +/- 4.61141
So 90% confidence interval is
33.6385 to 42.861
The following data represents the age in weeks at which babies start crawling based on a...
The following data represents the age (in weeks) at which babies first crawl based on a random sample of 12 mothers conducted by essential baby. Assume that this population is normally distributed. Here’s the data 52 30 44 35 39 26 47 37 56 26 39 28 Construct 95% confidence interval for the mean age at which a baby first crawls. What is the parameter, assumptions, interval and conclusion?
The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and sequals9.930 weeks. Construct and interpret a 99% confidence interval for the population standard deviation of the age (in weeks) at which babies first crawl. 55 31 43 35 39 26 48 37 53 27 39 27
The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and s=10.247 weeks. Construct and interpret a 99% confidence interval for the population standard deviation of the age (in weeks) at which babies first crawl. 51 31 44 34 39 26 49 37 58 27 38 28
The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. 52 30 44 35 47 37 56 26 37 39 44 52 Mean=41.58 StDev=9.22 (a) Construct a 95% confidence interval for the mean age at which a baby first crawls. Select the correct choice below and fill in any answer boxes in your choice. A. (nothing,nothing) (Use ascending order. Round to one decimal place as needed.) B. A 95% confidence...
Fill out the following below: Parameter: The following data represent the age (in weeks) at which babies first crawl based on a random sample of 12 mothers conducted by Essential Baby. Assume that this population is normally distributed. Assumptions: Here is the data: 52 30 44 35 39 26 47 37 56 26 39 28 Name: Construct a 95% confidence interval for the mean age at which a baby first crawls. Interval: (Round your answers to one decimal place) Use...
The data shown below represent the age (in weeks) at which babies first crawl, based on a survey of 12 mothers. Complete parts (a) through (c) below. 355 52 30 47 37 30 47 44 58 35 Click the icon to view the table of critical correlation coefficient values for normal probability plots (a) Draw a normal probability plot to determine this reasonable to conclude the data come from a population that is normally distributed. Choose the correct answer belon...
The data shown to the right represent the age (in weeks) at which babies first crawl, based on a survey of 12 mothers. Complete parts (a) through (c) below 52 30 35 47 37 56 26 44 44 26 Click here to view the table of clic URSS Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table (a) Draw a normal probability plot to determine...
10(c) me The data shown to the right represent the age (in weeks) at which babies firstf crawl, based on a survey of 12 mothers. Complete parts (a) through (c) below.. 30 35 26 37 52 44 47 56 37 52 Tes 54 Click here to view the table of critical t-values 26 Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table, Activ k 20...
The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and s 10.048 weeks. Construct and interpret a 95% confidence interval for the population standard deviation of the age (in weeks) at which babies first crawl. 353 31 42 36 38 27 47 38 57 25 4129 Click the icon to view the table of critical values of the chi-square distribution. Select the correct choice...
The data shown below represent the age in weeks) at which babies first crawl, based on a survey of 12 mothers. Complete parts (a) through (c) below. 52 30 44 350 47 37 56 20 32 26 37 35 Click here to view the table ortical comelation coefficient les for normal robability to Click here to view.cage 1 of the standard normal distribution table. Click here to view page 2 of the standard romal distribution , Click here to view...