For this sample data, x = 23. 3 years and s = 3.4 years. Test the null hypothesis that this distribution of frequencies follows a normal distribution pattern, using the 1 percent level of significance.

Q: for the following distribution -1,5,6. what is the sample variance?

A: Given data -1,5,6

Q: Assume that the hay fever rate in each age group has an approximately normal distribution. Do the…

A: Given : Claim : The age group over 50 has a lower rate of hay fever.

Q: Carry out an appropriate statistical test to determine if the variable D follows a Normal…

A: Consider, the mean and standard deviation values for the given values: Consider, the expected…

Q: Which describes a normal distribution with mean μ and variance o²?

A: here use basic of normal distribution curve

Q: Do men score the same on average compared to women on their statistics finals? Final exam scores of…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: For the standard normal curve, what percentage of data is located between ¥-2 0 and ¥+20?

A: Note: Thank you for the question. Since notations are not clear to us, we have considered it as μ-2σ…

Q: given a normal distribution curve, what is the area below a z-score of -1.2?

A: Given that, The z-score value is -1.2.

Q: If a distribution is normal with μ = 10 and σ = 5, what is the z score of 20?

A:

Q: For a normal distribution, the first quartile corresponds with the 25th percentile.   A.) True B.)…

A:

Q: For any normal distribution, about 68 % of the data lie within one standard deviation of the mean.…

A: The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical…

Q: For the above distribution (-1,0,1), what is the sample variance?

A: Use the given data to form the excel table:

Q: The data are shown below. IQ Scores Younger Sibling 88 107 107 113 78 100 113 108 103 100 Older…

A: Younger (X)  Older (Y) d = X-Y     88 101 -13     107 112 -5 Mean (d) -5.2 107 111 -4 SD (d)…

Q: In a normal distribution with mean 3 and variance 49, what are the upper and lower limit scores for…

A: The given information is that the scores distributed normally with mean 3 and variance is 49. The…

Q: Under which circumstance below is the median likely to be a better measure of central tendency than…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: Suppose the random variable xx has a normal distribution with μ=300μ=300 and σ=30σ=30. Find the…

A: Given: μ=300, σ=30.

Q: Assuming a normal distribution, for a sample with M-40 and s=4, about 95% of the individuals will…

A: 32 and 48

Q: The relative standard deviation for an .8 unknown sample that gave a S/N ratio of 6 * is 1.0 0.2 0.4…

A: Given : Relative standard deviation = 0.8 Sn = 6

Q: . Carry out an appropriate statistical test to determine if the variable D follows a Normal…

A: Consider, the mean and standard deviation values for the given values: L U Midpoint, x f x*f…

Q: in a normal distribution with mean 3 and variance 49 What are the upper and lower scores for the…

A: We have given that a normal distribution with mean 3 and variance 49.

Q: If a distribution is normal with μ = 60 and σ = 15, what is the z score of 40?

A:

Q: given a standardized normal distribution with a mean of 0 and a standard deviation of 1 as in table…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: Do men score lower on average compared to women on their statistics finals? Final exam scores of ten…

A: According to our policy we can answer only first the three sub part for remaining please repost the…

Q: Do men score the same on average compared to women on their statistics finals? Final exam scores of…

A: In this study the test is conducted about average of men score is same as the women indicating that…

Q: Given a normal distribution with μ=45 and σ=5​   For this​ distribution, 9​% of the values are…

A:

Q: Do men score lower on average compared to women on their statistics finals? Final exam scores of…

A: The random variable exam scores follows normal distribution. There are two independent samples which…

Q: A random sample of size 25 with mean 30 and variance 49 is selected from a normal distribution. A…

A: Given that, Sample size (n) = 25 Sample mean = 30 Sample variance = 49

Q: The sampling distribution of Pis closely related to the normal distribution. True or False

A: Here we will use Basics of sampling distribution

Q: What is the probability of randomly selecting a zscore less than z = - 1.25 from a normal…

A:

Q: Do men score higher on average compared to women on their statistics finals? Final exam scores of…

A: The objective is to test whether men score higher on average compared to women on the statistics…

Q: For a normal distribution with a mean of μ = 120 and σ = 20 What range of scores would form the…

A: Solution

Q: given that the sample mean=105, pop standard deviation=27, n=44, a=0.01 what is the critical s-score

A: Note: In this question it has mentioned that we have to find the s – score but it seems that it is a…

Q: Use the standand normal distribution table to determine the percent of data less than z = 0.59.

A: from the normal distribution table For zscore= 0.59

Q: A z-score that is 6 points below the mean corresponds to a z = -2.00. What is the populations'…

A:

Q: for a normal distribution with a mean of 7 and a stanard deviation of 6, the value 10 has a z value…

A: It is given that mean and standard deviation are 7 and 6, respectively.

Q: Which of the following histograms could be modeled by a normal distribution?

A: Given ,  The above graph is the right skewed. Therefore it is not the symmetric distribution. Hence…

Q: Under what circumstances is the distribution of sample means guaranteed to be a normal distribution?

A: A population includes all members from a specified group, all possible outcomes or measurements that…

Q: Do the poor spend less time in the shower than the rich? The results of a survey asking poor and…

A: From the given information, we have the t-test statistic value as -2.501 and the p-value as 0.0157.…

Q: For a normal distribution with a mean of μ=85and a standard deviation of σ=20, find the proportion…

A:

Q: Do men score lower on average compared to women on their statistics finals? Final exam scores of…

A: From the provided data we compute the mean and standard deviations using the AVERAGE and STDEV.S…

Q: Find the range, the standard deviation, and the variance for the given samples. round non-integer…

A: According to question given2.4, 4.1, 4.4, 3.4,2.8, 3.1

Q: Do the poor spend the same amount of time in the shower as the rich? The results of a survey asking…

A: H0: Means are same H1: Means are different F-statistic value = 11.19005 P-value = 0.00293 Data…

Q: following results. Do the populations have different variances at 5% level of significance?

A:

Q: In a normal distribution with mean 3 and variance 49, what are the upper and lower limit scores for…

A: Solution: Let X be the random variable. From the given information, the distribution is normal with…

Q: An opinion poll asks a simple random sample of   1500 adults how they view the state of the economy.…

A: According to the provided information, a survey is done on a random sample (n) of 1500 adults and…

Q: Do men score lower on average compared to women on their statistics finals? Final exam scores of…

A: The data shows the scores for mean and women on the statistics subject.

Q: Find the range, the standard deviation, and the variance for the given samples. Round non-integer…

A: The range of a set of observations is defined as the difference between the maximum and minimum…

Q: The number of 911 calls in Butte, Montana, has a Poisson distribution with a mean of 10.0 calls a…

A: The Poisson distribution:A discrete random variable X is said to have a Poisson distribution with…

Q: Do the poor spend less time in the shower than the rich? The results of a survey asking poor and…

A: The t-test statistic is, t=x¯1-x¯2s12n1+s22n2where,x¯1, x¯2=sample meanss1, s2=sample standard…

Q: What proportion of a normal distribution corresponds to z scores greater than -0.82?   Question 10…

A: According to the given information, we have Z score = -0.82 (Right tailed)