A random sample of 100 packs of apples with a professed weight of 1kg was found to have mear 1020g and standard deviation 12g. a) Find a 95% confidence interval for the mean weight of all such packs of apples. b) Does the interval include 1kg? Can you think of a reason (which any retailer would be able- to tell you) why you might expect the interval not to include 1kg? c) What confidence level would have resulted in the interval just about including 1kg?

Q: Here are summary statistics for randomly selected weights of newborn girls: n= 232, *= 32.2 hg,…

A: Given n=232 Mean=32.2 Standard deviations=7.4

Q: The average height of students at a random place from an SRS of 12 students gave a standard…

A: The sample size is 12 and sample standard deviation is 2.5.

Q: fitness of 514 adults (aged 25 to 35) were sampled and their heart rates measured immediately after…

A: Given that  Sample size n =514 Sample mean=1427 Population standard deviation =325

Q: A researcher is interested in finding a 98% confidence interval for the mean number of times per day…

A: Given Mean =X-bar=26.5 Standard deviations=S=19.7 n=97

Q: A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company.…

A: Given information Standard deviation σ= 2.10 Confidence interval = 0.95 Significance level(α) = 1-…

Q: Out of sample of 500 people, 25% exercise daily. What is the confidence interval for the population…

A: Given Information:    n=500  p=0.25 q=1-p=1-0.25=0.75α=0.05

Q: Suppose that the population of the number of hours slept by all college students the night before…

A: The sample size is 19, sample mean is 6.818, and sample standard deviation is 2.017.

Q: On average, Americans spent $940 dollars on holiday gifts in 2019, with a standard deviation of…

A: Here, we have given that on average , Americans spent $ 940 dollars on holiday gifts in 2019, with…

Q: A college admissions officer takes a simple random sample of 96 entering freshmen and computes their…

A: We have to find out lower confidence interval...

Q: 2. In a random sample of 87 college students, the average number of GroupMe messages handled in one…

A:

Q: 7) Part a and b please.

A: To find the 95% confidence interval for the mean weight of all bags of tomatoes, we need to use the…

Q: ) Which distribution table will be used to find the critical value and why? A.) t-table because…

A:

Q: A sample of 50 employees is found to have a mean of $32474 and a standard deviation of $1334. A)…

A:

Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

Q: A piece of plywood is composed of five layers. The two outer layers are veneers with thickness 0.50…

A:

Q: A random sample of size 30 is taken from a normal distribution with standard deviation 9. The…

A: A random sample of size 30 is taken from a normal distribution with standard deviation 9. The sample…

Q: David's gasoline station offers 4 cents off per gallon if the customer pays in cash and does not use…

A:

Q: In a recent study of 35 ninth graders, the mean number of hours per week they played video games was…

A: Given data, n=35Mean x=16.6sd    σ=2.8

Q: in a nigh school, the average class size of nine math class was 26.1 with a standard deviation of…

A: We have given that,  Sample mean (x̄) = 26.1, standard deviation (s) = 6.21 and sample size (n) = 9…

Q: Noah wants to advertisenl how many chocolate chip cookies are in each Big Chip cookie at his bakery.…

A: Given number of chocolate chips per cookie in sample follow normal distribution.Sample size = n =…

Q: A sample of 169 observations showed an average of 15 and a standard deviation of 26. Construct the…

A: Since the population standard deviation is unknown, t distribution can be used for the computation…

Q: 13 squirrels were found to have an average weight of 790 grams with a sample standard deviation of…

A: Given that  n=13 , Mean=X̄=790 , Standard deviation=S=8.3 95% confidence interval

Q: Construct the indicated confidence interval for the difference between the two population means.…

A: Given:- The data describes the hours men and women had watched television during the previous week.…

Q: atn] Eight squirrels were found to have an average weight of 9.7 ounces with a sample standard…

A: The provided sample mean is Xˉ=9.7\bar X = 9.7 and the sample standard deviation is s=0.2s = 0.2.…

Q: Suppose that a random sample of 128 graduate-admissions personnel was asked what role scores on…

A: From the provided information, Sample size (n) = 128 From which 70 answered "very important". Sample…

Q: The average height of students in a state from an SRS of 17 students gave a standard deviation of…

A: given data   sample size(n) = 17 sample standard deviation(s)  = 2.9construct 95 % ci for σ.

Q: 1. The strength of a fiber is normally distributed with a known population standard deviation of 12…

A: Here since the population standard deviation is given we use the Z value for the computation of…

Q: Here are the summary statistics for randomly selected weights of newborn girls: n =247, x= 32.2 hg,…

A: What is the confidence interval for the population mean u ? _ hg < u< hg _ (round to one…

Q: college admissions officer takes a simple random sample of 80 entering freshmen and computes their…

A:

Q: 10 squirrels were found to have an average weight of  610  grams with a sample standard deviation of…

A: We have given that  Sample size n =10 Sample mean =610 Standard deviation =7.75

Q: A professor administers a standardized math te st to his class of 6 5 students. The m ean score…

A: The information provided- n: 65 = number of students m: 145 s: 21 99% CI is to be found.

Q: Samples of two different models of cars were selected, and the actual speed for each car was…

A: