Can I please have an explanation on how to answer these with a Ti-84 preferably, or excel. Thank you!

D a) 4) When the population standard deviation is not known, the sample standard deviation is used instead of the population standard deviation. Consequently, the t-score (t3) needs 2 to be used instead of the z-score. Find the t-score for the 99% condence interval with sample size of 40. Express the answer as a decimal value rounded to the nearest thousandth. The weights of one variety of watermelon, orange crisp, are normally distributed with a population mean of 8.12 kilograms and a population standard deviation of 0.94 kilograms. Find the value of the standard error for the mean, (05), for a random sample of 56 orange crisp watermelons. Express the answer as a decimal value rounded to the nearest thousandth. Shelf life of batteries is a measure of the amount of time batteries last in storage. Suppose the shelf lives of AAA alkaline batteries are normally distributed. The population standard deviation is not known. In a random sample of 60 AAA alkaline batteries, the sample mean is 113 months and the sample standard deviation is 12.3 months. Find the margin of error called the error bound for a population mean (EBM) of the 90% condence interval. Express the answer as a decimal value rounded to the nearest thousandth. The computational process to nd the 97% condence interval yielded a sample proportion of 0.38 and the error bound for a population proportion (EBP) of 0.055. What is the upper bound of the 97% condence interval? Express the answer as a decimal value rounded to the nearest thousandth. Note: the upper bound is the larger of the two values of the condence interval. 62 out of 140 respondents between the ages of eighteen to twenty~nine in a random survey from the year 2018 indicated they deleted the Facebook app from their phone. Find the point estimate, p', for this sample. Express the answer as a decimal value rounded to the nearest thousandth. In a random survey of 50 teenagers between the ages of thirteen and seventeen, only 52% uses Facebook. Find the standard deviation of the sampling distribution (the estimate standard error), O'pi. Express the answer as a decimal value rounded to the nearest thousandth. 7) Energizer claims its AA batteries have a shelf life of up to 10 years. Shehc life is the length of time batteries last in storage. In a random sample of 37 such batteries, 81% were found to have a shelf life up to 10 years. Find the margin of error called the error bound for a population proportion (EBP) of the 95% condence interval. Note: the distribution of the sample proportions is approximately normal. Express the answer as a decimal value rounded to the nearest thousandth. 3) The heart rate of runners during a marathon race is approximately normal. The table below shows the heart rates of a random sample of 12 marathon runners. Find the upper bound of the 98% condence interval for the population mean heart rate of marathon runners during a race. Express the answer as a decimal value rounded to the nearest tenth. Heart Rate Data q) In a survey of 60 randomly selected members of a movie audience, 27 of them indicated that they would watch the movie again in a theater. Find the lower bound of the 98% condence interval for the population proportion. Express the answer as a decimal value rounded to the nearest thousandth