For each data set, compute the standard deviation. What is the standard deviation of the sample of size 5? (Type an integer or decimal rounded to one decimal place as needed.)

Find the standard deviation (rounded to the nearest unit) for the data indicated.   Test Score              Frequency 90   1         80   4         70   7         60   6         50   3

Find the mean and standard deviation of the number of red-headed Scots in a randomly selected group of 155. The probability of having red hair is still 13% for Scottish people. a. Mean = b. Standard deviation (Round to 2 places)=

Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Click the icon to view the data table of IQ scores. a. Use a 0.05 significance level to test the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. What are the null and alternative hypotheses? Assume that population 1 consists of subjects with medium lead levels and population 2 consists of subjects with high lead levels. X A. Ho: H₁ H₂ H₁ H₁ H₂ c. Ho: M₁ = H₂ H₁: H₁ H₂ The test statistic is 0.56. (Round to two decimal places as needed.) The P-value is (Round to three decimal…

An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for each of the four crashes was $425, $462, 5405, $234 a . Compute the range, sample variance, and sample standard deviation cost of repair. The range is $ s2 = dollars? (Round to the nearest whole number as needed.) s= SI (Round to two decimal places as needed.)

Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling distribution. Then sketch a graph of the sampling distribution.   The mean price of photo printers on a website is ​$227 with a standard deviation of ​$69. Random samples of size 31 are drawn from this population and the mean of each sample is determined. The mean of the distribution of sample means is nothing.