4, The hardness of ten steel samples was measured and the results were as follows. 1 2 8. Sample Hardness 3 4 5 7 10 90 92 95 91 98 102 97 92 95 99 Calculate the mean, median, mode, standard deviation and variance.

The commercial for the new Meat Man Barbecue claims that it takes 11 minutes for assembly. A consumer advocate thinks that the assembly time is higher than 11 minutes. The advocate surveyed 10 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 11.3 minutes. The standard deviation for this survey group was 2.6 minutes. What can be concluded at the the α= 0.05 level of significance level of significance? The null and alternative hypotheses would be: H0:  H1: The test statistic =    (please show your answer to 3 decimal places.)The p-value =    (Please show your answer to 4 decimal places.)

The number of ornaments placed on trees is recorded. The results are as follows: 26 26 22 29 24 30 26 34 21 24 20 31 20 35 32 33 26 26 29 29 Find the Mean, Median, Mode, Midrange, Variance and Standard Deviation of the data.Round to 2 decimal places if necessary. Mean:        Median:    Mode:        Midrange:    Variance:        Standard Deviation:

A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.