population has a mean=77 and a standard deviation =27 find the mean and standard deviation of a sampling distribution of sample means with the sample size n=81
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- The selling price of new homes in a city over a year was normally distributed with a mean of $115,000 and a standard deviation of $25,000. A random sample of 16 new home sales from this city was taken. Describe the sampling distribution of the sample mean (indicate center, spread, shape). mean = $115,000, standard deviation = $6,250, and shape = exactly normal mean = $115,000, standard deviation = $2,500, and shape = exactly normal mean = $115,000, standard deviation = $25,000, and shape = exactly normal mean = $115,000, standard deviation = $6,250, and shape = unknown mean = $115,000, standard deviation = $2,500, and shape = approximately normal by the Central Limit Theorem BO MA W P DOLength of skateboards in a skateshop are normally distributed with a mean of 32 in and a standard deviation of 0.6 in. The figure below shows the distribution of the length of skateboards in a skateshop. Calculate the shaded area under the curve.Find out mean deviation from mean by applying direct method from the following distribution: Values: 48, 50, 46, 44, 40, 42, 35, 30, 20, 15.
- Calculate the estimated standard error for the case where the sample standard deviation is 25 and the sample size 137. Answer to three decimal places if necessary, you may round up or down.Ages of pennies have a mean of 10.44 years and standard deviation of 8.6 years. Suppose we take a sample of 100 pennies from a bank. What is the standard deviation of the sampling distribution of the sample mean of the ages of these pennies? (round answers to 2 decimal places)A reading class can read an mean of 175 words per minute and a population standard deviation of 20 words per minutes. The top 3% of the class is to receive a special award for a random sample of 49 students. What is the minimum average number of words per minute a student would need to read in order to get the award for a random sample of 49 students? Assume the data is normally distributed.
- Acorns in the northern Atlantic regions of the U. S. have an average volume of 3.75 cubic centimeters, with a standard deviation of .85 centimeters. If we were to collect 1000 samples of 300 randomly-selected acorns, describe the sampling distribution for the sample mean of acorn volumes. Round to the nearest hundredth (two decimal places) if necessary. Shape: Center: Spread:Exam For a group of 200 candidates, the mean and standard deviation of scores were found to be 40 and 15 respectively. Later on it was discovered that the scores 43 and 35 were misread as 34 and 53 respectively. Find the corrected mean and standard deviation corresponding to the correct figures. SSL V LETICIDAL 200The number of violent crimes committed in a day possesses a distribution with a mean of 2.1 crimes per day and a standard deviation of 5 crimes per day. A random sample of 100 days was observed, and the mean number of crimes for the sample was calculated. Describe the sampling distribution of the sample mean.